Which of the following are found in extreme saline conditions?
1. Archaebacteria
2. Eubacteria
3. Cyanobacteria
4. Mycobacteria
Which one of the following statements is correct with reference to enzymes?
1. Holoenzyme= Apoenzyme+Coenzyme
2. Coenzyme= Apoenzyme+Holoenzyme
3. Holoenzyme= Coenzyme+ CO-factor
4. Apoenzyme=Holoenzyme+Coenzyme
A decrease in blood pressure/volume will not cause the release of?
1. Atrial natriuretic factor
2. Aldosterone
3. ADH
4. Renin
Which cells of "Crypts of Lieberkühn" secrete antibacterial lysozyme?
1. Paneth cells
2. Zymogen cells
3. Kupffer cells
4. Argentaffin cells
Which of the following are not polymeric?
1. | Proteins | 2. | Polysaccharides |
3. | Lipids | 4. | Nucleic acids |
Functional megaspore in an angiosperm develops into:
1. | Endosperm | 2. | Embryo sac |
3. | Embryo | 4. | Ovule |
Myelin sheath is produced by:
1. Astrocytes and Schwann cells
2. Oligodendrocytes and Osteoclasts
3. Osteoclasts and Astrocytes
4. Schwann cells and Oligodendrocytes
Attractants and rewards are required for:
1. Entomophily
2. Hydrophily
3. Cleistogamy
4. Anemophily
Receptor sites for neurotransmitters are present on:
1. Pre-synaptic membrane
2. Tips of axons
3. Post-synaptic membrane
4. Membrane of synaptic vesicles
Coconut fruit is a:
1. Berry
2. Nut
3. Capsule
4. Drupe
Adult human RBCs are enucleated. Which of the following statement(s) is/ are the most appropriate explanation for this feature?
a. | They do not need to reproduce |
b. | They are somatic cells |
c. | They do not metabolize |
d. | All their internal space is available for oxygen transport |
1. Only (a)
2. (a),(c) and (d)
3. (b) and (c)
4. Only (d)
Capacitation occurs in:
1. Epididymis
2. Vas deference
3. Female reproductive tract
4. Rete testis
Asymptote in a logistic growth curve is obtained when:
1. K = N
2. K > N
3. K < N
4. The value of 'r' approaches zero
Artificial selection to obtain cows yielding higher milk output represents:
1. | Directional, as it pushes the mean of the character in one direction |
2. | Disruptive, as it splits the population into two, one yielding higher output and the other lower output |
3. | Stabilizing followed by disruptive, as it stabilizes the population to produce higher-yielding cows |
4. | Stabilizing selection, as it stabilizes this character in the population |
Select the mismatch:
Column I | Column II | |
1. | Rhodospirillum | Mycorrhiza |
2. | Anabaena | Nitrogen fixer |
3. | Rhizobium | Alfalfa |
4. | Frankia | Alnus |
Good vision depends on adequate intake of carotene rich food.
Select the best option from the following statements:
i. | Vitamin A derivatives are formed from carotene |
ii. | The photopigments are embedded in the membrane discs of the inner segment |
iii. | Retinal is a derivative of Vitamin A |
iv. | Retinal is a light-absorbing part of all the visual photopigments |
1. (i),(iii) and (iv)
2. (i) and (iii)
3. (ii), (iii) and (iv)
4. (i) and (iv)
The DNA fragments separated on an agarose gel can be visualized after staining with:
1. Acetocarmine
2. Aniline blue
3. Ethidium bromide
4. Bromophenol blue
The hepatic portal vein drains blood to the liver from:
1. Stomach
2. Kidneys
3. Intestine
4. Heart
The vascular cambium normally gives rise to:
1. Primary Phloem
2. Secondary xylem
3. Periderm
4. Phelloderm
Thalassemia and sickle cell anaemia are caused due to a problem in globin molecule synthesis. Select the correct statement:
1. | Both are due to a quantitative defect in globin chain synthesis |
2. | Thalassemia is due to less synthesis of globin molecules |
3. | Sickle cell anemia is due to a quantitative problem of globin molecules |
4. | Both are due to a qualitative defect in globin chain synthesis |
The genotypes of a husband and wife are IAIB and IAi respectively. Among the blood types of their children, how many different genotypes and phenotypes are possible?
1. 3 genotypes; 4 phenotypes
2. 4 genotypes; 3 phenotypes
3. 4 genotypes; 4 phenotypes
4. 3 genotypes; 3 phenotypes
Which of the following facilitates opening of stomatal aperture?
1. | Decrease in turgidity of guard cells |
2. | Radial orientation of cellulose microfibrils in the cell wall of guard cells |
3. | Longitudinal orientation of cellulose microfibrils in the cell wall of guard cells |
4. | Contraction of outer wall of guard cells |
In Bougainvillea thorns are the modifications of:
1. Adventitious root
2. Stem
3. Leaf
4. Stipules
Which one of the following is related to Ex-situ conservation of threatened animals and plants?
1. Biodiversity hot spots
2. Amazon rainforest
3. Himalayan region
4. Wildlife safari parks
Root hairs develop from the region of:
1. Elongation
2. Root cap
3. Meristematic activity
4. Maturation
A disease caused by an autosomal primary non-disjunction is:
1. Klinefelter's Syndrome
2. Turner's Syndrome
3. Sickle Cell Anemia
4. Down's Syndrome
The water potential of pure water is:
1. Less than zero
2. More than zero but less than one
3. More than one
4. Zero
Which of the following options gives the correct sequence of events during mitosis?
1. | Condensation, nuclear membrane disassembly, arrangement at the equator, centromere division, segregation, telophase |
2. | Condensation, crossing over, nuclear membrane disassembly, segregation, telophase |
3. | Condensation, centromere division, segregation, arrangement at the equator, telophase |
4. | Condensation, nuclear membrane disassembly, crossing over, segregation, telophase |
The process of separation and purification of expressed protein before marketing is called:
1. Downstream processing
2. Bioprocessing
3. Post-product processing
4. Upstream processing
A temporary endocrine gland in the human body is:
1. | Corpus cardiacum | 2. | Corpus luteum |
3. | Corpus allatum | 4. | Pineal gland |
Which of the following is made up of dead cells?
1. Collenchyma
2. Phellem
3. Phloem
4. Xylem parenchyma
An example of colonial alga is:
1. | Volvox | 2. | Ulothrix |
3. | Spirogyra | 4. | Chlorella |
Column I | Column II | ||
(a) | Gonorrhea | (i) | HIV |
(b) | Syphilis | (ii) | Neisseria |
(c) | Genital Warts | (iii) | Treponema |
(d) | AIDS | (iv) | Human Papilloma-Virus |
1. | a-(iii) b-(iv) c-(i) d-(ii) | a-(iv) b-(ii) c-(iii) d-(i) | |
3. | a-(iv) b-(iii) c-(ii) d-(i) | a-(ii) b-(iii) c-(iv) d-(i) |
The function of copper ions in copper releasing IUDs is to
1. | inhibit gametogenesis |
2. | make uterus unsuitable for implantation |
3. | inhibit ovulation |
4. | suppress sperm motility and fertilizing capacity of sperms |
Which of the following in sewage treatment removes suspended solids?
1. Secondary treatment
2. Primary treatment
3. Sludge treatment
4. Tertiary treatment
An important characteristic that Hemichordates share with Chordates is:
1. Ventral tubular nerve cord
2. Pharynx with gill slits
3. Pharynx without gill slits
4. Absence of notochord
The final proof for DNA as the genetic material came from the experiments of:
1. Hershey and chase
2. Avery, McLeod and McCarty
3. Har Gobind Khorana
4. Griffith
Among the following characters, which one was not considered by Mendel in his experiments on pea?
1. Trichomes-Gladular or non-gladular
2. Seed-green or yellow
3. Pod-inflated or constricted
4. Stem-Tall or Dwarf
Plants which produce characteristic pneumatophores and show vivipary belong to:
1. Halophytes
2. Psammophytes
3. Hydrophytes
4. Mesophytes
The pivot joint between atlas and axis is a type of:
1. Cartilaginous joint
2. Synovial joint
3. Saddle joint
4. Fibrous joint
With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?
1. | Increasing atmospheric CO2 concentration up to 0.05% can enhance the CO2 fixation rate |
2. | C3 plants respond to higher temperatures with enhanced photosynthesis while C4 plants have much lower temperature optimum |
3. | Tomato is a greenhouse crop that can be grown in CO2 enriched atmosphere for higher yield |
4. | Light saturation for CO2 fixation occurs at 10% of full sunlight |
DNA fragments are:
1. Negatively charged
2. Neutral
3. Either positively charged depending on their size
4. Positively charged
Which of the following components provides sticky character to the bacterial cell?
1. Nuclear membrane
2. Plasma membrane
3. Glycocalyx
4. Cell Wall
Which of the following options best represents the enzyme composition of pancreatic juice?
1. Amylase, pepsin, trypsinogen, maltase
2. Peptidase, amylase, pepsin, rennin
3. Lipase, amylase, trypsinogen, pro carboxypeptidase
4. Amylase, peptidase, trypsinogen, rennin
Which among these is the correct combination of aquatic mammals?
1. Dolphin, Seals, Trygon
2. Whales, Dolphin, Seals
3. Trygon, Whales, Seals
4. Seals, Dolphin, Sharks
Fruit and leaf drop at early stages can be prevented by the application of:
1. Ethylene
2. Auxins
3. Gibberellic acid
4. Cytokinins
Select the correct route for the passage of sperms in male frogs:
1. | Testes → Vasa efferentia → Kidney → Seminal Vesicle→ Urinogenital duct → Cloaca |
2. | Testes → Vasa efferentia → Bidder's canal → Uretar→ Cloaca |
3. | Testes → Vasa efferentia → Kidney → Bidder's canal → Urinogenital duct → Cloaca |
4. | Testes → Bidder's canal→ Kidney→ Vasa efferentia→ Urinogenital duct→ Cloaca |
In case of a couple where the male is having a very low sperm count, which technique will be suitable for fertilization?
1. | Gamete intracytoplasmic fallopian transfer |
2. | Artificial insemination |
3. | Intracytoplasmic sperm injection |
4. | Intrauterine transfer |
Which ecosystem has the maximum biomass?
1. Grassland ecosystem
2. Pond ecosystem
3. Lake ecosystem
4. Forest ecosystem
Lungs are made up of air-filled sacs, the alveoli. They do not collapse even after forceful expiration, because of:
1. Inspiratory Reserve Volume
2. Tidal Volume
3. Expiratory Reserve Volume
4. Residual Volume
Presence of plants arranged into well-defined vertical layers depending on their height can be seen best in:
1. Tropical Rain Forest
2. Grassland
3. Temperate Forest
4. Tropical Savannah
Which of the following statements is correct?
1. | The descending limb of loop of Henle is impermeable to water. |
2. | The ascending limb of loop of Henle is permeable to water. |
3. | The descending limb of loop of Henle is permeable to electrolytes. |
4. | The ascending limb of loop of Henle is impermeable to water. |
Alexander Von Humboldt described for the first time:
1. Laws of limiting factor
2. Species-Area relationships
3. Population Growth equations
4. Ecological Biodiversity
Zygotic meiosis is characteristic of?
1. Fucus
2. Funaria
3. Chlamydomonas
4. Marchantia
If there are 999 bases in an RNA that codes for a protein with 333 amino acids, and the base at position 901 is deleted such that the length of the RNA becomes 998 bases, how many codons will be altered?
1. 11
2. 33
3. 333
4. 1
Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by:
1. Bee
2. Wind
3. Bat
4. Water
Transplantation of tissues/organs fails often due to non-acceptance by the patient's body. Which type of immune-response is responsible for such rejections?
1. Cell-mediated immune response
2. Hormonal immune response
3. Physiological immune response
4. Autoimmune response
Life cycles of Ectocarpus and Fucus respectively are:
1. Diplontic, Haplodiplontic
2. Haplodiplontic, Diplontic
3. Haplodiplontic, Haplontic
4. Haplontic, Diplontic
A gene whose expression helps to identify transformed cell is known as:
1. | Vector | 2. | Plasmid |
3. | Structural gene | 4. | Selectable marker |
A dioecious flowering plant prevents both:
1. Autogamy and geitonogamy
2. Geitonogamy and xenogamy
3. Cleistogamy and xenogamy
4. Autogamy and xenogamy
Which statement is wrong for Krebs' cycle?
1. | There is one point in the cycle where FAD+ is reduced to FADH2 . |
2. | During conversion of succinyl CoA to succinic acid, a molecule of GTP is synthesized. |
3. | The cycle starts with condensation of acetyl group (acetyl CoA) with pyruvic acid to yield citric acid. |
4. | There are three points in the cycle where NAD+ is reduced to NADH + H+. |
Phosphoenol pyruvate (PEP) is the primary CO2 acceptor in:
1. C4 plants
2. C2 plants
3. C3 and C4 plants
4. C3 plants
During DNA replication, Okazaki fragments are used to elongate:
1. | The lagging strand towards the replication fork. |
2. | The leading strand away from the replication fork. |
3. | The lagging strand away from the replication fork. |
4. | The leading strand towards the replication fork. |
Which of the following RNA should be most abundant in an animal cell?
1. | t-RNA |
2. | m-RNA |
3. | mi-RNA |
4. | r-RNA |
GnRH, a hypothalamic hormone, needed in reproduction, acts on:
1. | Anterior pituitary gland and stimulates secretion of LH and FSH. |
2. | Posterior pituitary gland and stimulates secretion of oxytocin and FSH. |
3. | Posterior pituitary gland and stimulates secretion of LH and relaxin. |
4. | Anterior pituitary gland and stimulates secretion of LH and oxytocin. |
What is the criterion for the movement of DNA fragments on agarose gel during gel electrophoresis?
1. The smaller the fragment size, the farther it moves
2. Positively charged fragment move to farther end
3. Negatively charged fragments do not move
4. The larger the fragment size, the farther it moves
Hypersecretion of Growth Hormone in adults does not cause further increase in height, because?
1. | Epiphyseal plates close after adolescence. |
2. | Bones lose their sensitivity to Growth Hormone in adults. |
3. | Muscle fibres do not grow in size after birth. |
4. | Growth Hormones become inactive in adults. |
DNA replication in bacteria occurs:
1. Within nucleolus
2. Prior to fission
3. Just before transcription
4. During S phase
Which one from those given below is the period for Mendel's hybridization experiments?
1. | 1840-1850 | 2. | 1857-1869 |
3. | 1870-1877 | 4. | 1856-1863 |
Viroids differ from viruses in having;
1. | DNA molecules without protein coat |
2. | RNA molecules with protein coat |
3. | RNA molecules without protein coat |
4. | DNA molecules with protein coat |
MALT constitutes about _______ percent of the lymphoid tissue in the human body.
1. | 20% | 2. | 70% |
3. | 10% | 4. | 50% |
Which of the following is correctly matched for the product produced by them?
1. Methanobacterium: Lactic acid
2. Penicillium notatum: Acetic acid
3. Saccharomyces cerevisiae: Ethanol
4. Acetobacter aceti: Antibiotics
Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen?
1. Pseudomonas
2. Mycoplasma
3. Nostoc
4. Bacillus
Which of the following represents order of Horse’?
1. Perissodactyla
2. Caballus
3. Ferus
4. Equidae
Frog’s heart when taken out of the body continues to beat for some time.
Select the best option from the following statements.
(a) Frog is a poikilotherm.
(b) Frog does not have any coronary circulation.
(c) Heart is "myogenic" in nature
(d) Heart is autoexcitable
1. Only (d)
2. (a) and (b)
3. (c) and (d)
4. Only (c)
Homozygous pure lines in cattle can be obtained by:
1. Mating of unrelated individuals of same breed.
2. Mating of individuals of different breed.
3. Mating of individuals of different species.
4. Mating of related individuals of same breed.
Identify the wrong statement in the context of heartwood:
1. It is highly durable
2. It conducts water and minerals efficiently
3. It comprises dead elements with highly lignified walls
4. Organic compounds are deposited in it
Anaphase Promoting Complex (APC) is protein degradation machinery necessary for proper mitosis of animal cells. If APC is defective in a human cell, which of the following is expected to occur?
1. Chromosomes will be fragmented
2. Chromosomes will not segregate
3. Recombination of chromosome arms will occur
4. Chromosomes will not condense
Which of the following cell organelles is responsible for extracting energy from carbohydrates to form ATP?
1. Ribosome
2. Chloroplast
3. Mitochondrion
4. Lysosome
Mycorrhizae are the example of:
1. Amensalism
2. Antibiosis
3. Mutualism
4. Fungistasis
Out of ‘X’ pairs of ribs in humans only 'Y' pairs are true ribs. Select the option that correctly represents values of X and Y and provides their explanation:
1. | X=12, Y=5 True ribs are attached to vertebral column and sternum on the two ends. |
2. | X=24, Y=7 True ribs are dorsally attached to vertebral column but are free on ventral side. |
3. | X=24, Y=12 True ribs are dorsally attached to vertebral column but are free on ventral side. |
4. | X=12, Y=7 True ribs are attached dorsally to vertebral column and ventrally to the sternum. |
In the case of Poriferans, the spongocoel is lined with flagellated cells called:
1. Oscula
2. Choanocytes
3. Mesenchymal cells
4. Ostia
Which one of the following statements is not valid for aerosols?
1. They alter rainfall and monsoon patterns
2. They caused increased agricultural productivity.
3. They have negative impact on agricultural land.
4. They are harmful to human health.
A baby boy aged two years is admitted to play school and passes through a dental check-up. The dentist observed that the boy had twenty teeth. Which teeth were absent in the boy?
1. Canines
2. Pre-molars
3. Molars
4. Incisors
Select the mismatch
1. Cycas - Dioecious
2. Salvinia - Heterosporous
3. Equisetum - Homosporous
4. Pinus - Dioecious
The morphological nature of the edible part of coconut is:
1. Cotyledon
2. Endosperm
3. Pericarp
4. Perisperm
Double fertilization is exhibited by:
1. Algae
2. Fungi
3. Angiosperms
4. Gymnosperms
Spliceosomes are not found in cells of;
1. Fungi
2. Animals
3. Bacteria
4. Plants
The association of histone H1 with a nucleosome indicates:
1. DNA replication is occurring
2. The DNA is condensed into a chromatin fibre
3. The DNA double helix is exposed
4. Transcription is occurring
The region of Biosphere Reserve which is legally protected and where no human activity is allowed is known as
1. Buffer Zone
2. Transition Zone
3. Restoration Zone
4. Core Zone
A gas that can readily
decolorize an acidified KMnO4 solution is:
1.
2.
3.
4.
The mechanism of a hypothetical reaction
X2 + Y2 → 2XY is given below:
(i) X2 → X + X (Fast)
(ii) X + Y2 ⇄ XY + Y (slow)
(iii) X + Y → XY (Fast)
The overall order of the reaction will be:
1. 2
2. 0
3. 1.5
4. 1
The element Z = 114 has been discovered recently. Family/group and electronic configuration from which it will belong are:
1. Carbon family and [Rn] 5f14 6d10 7s2 7p2
2. Oxygen family and [Rn] 5f14 6d10 7s2 7p4
3. Nitrogen family and [Rn] 5f14 6d10 7s2 7p6
4. Halogen family and [Rn] 5f14 6d10 7s2 7p5
The heating of phenylmethyl ether with HI produces-
1. Iodobenzene
2. Phenol
3. Benzene
4. Ethyl chloride
The correct order of acidity among the following is:
1. | \(CH \equiv CH > CH_3 - C \equiv CH \) \( > CH_2 = CH_2 > CH_3 - CH_3\) |
2. | \(CH \equiv CH > CH_2 = CH_2 \) \( > CH_3 - C \equiv CH > CH_3 - CH_3\) |
3. | \(CH_3 - CH_3 > CH_2 = CH_2 \) \( > CH_3 - C \equiv CH > CH \equiv CH \) |
4. | \( CH_2 = CH_2 > CH_3 - CH_3 \) \( > CH_3 - C \equiv CH > CH \equiv CH\) |
The equilibrium of three reactions with their respective equilibrium constants are given below,
\( \begin{array}{lc} \mathrm{N}_2+3 \mathrm{H}_2 \rightleftharpoons 2 \mathrm{NH}_3 & \mathrm{~K}_1 \\ \mathrm{~N}_2+\mathrm{O}_2 \rightleftharpoons 2 \mathrm{NO} & \mathrm{K}_2 \\ \mathrm{H}_2+\frac{1}{2} \mathrm{O}_2 \rightleftharpoons \mathrm{H}_2 \mathrm{O} & \mathrm{K}_3 \end{array} \)
The equilibrium constant (K) of the following reaction will be :
1. \( \frac{K_{2}K_{3}^{3}}{K_{1}}\)
2. \( \frac{K_{2}K_{3}}{K_{1}}\)
3. \( \frac{K_{2}^{3}K_{3}}{K_{1}}\)
4. \( \frac{K_{3}^{3}K_{1}}{K_{2}}\)
The most acidic compound among the following is:
1. | 2. | ||
3. | 4. |
Mark the correct increasing order of basic strength of given molecules:
(I) | (II) | (III) |
1. III < I < II
2. III < II < I
3. II < I < III
4. II < III < I
Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts are put under an electric field?
1. K
2. Rb
3. Li
4. Na
The most suitable method used for the separation of 1:1 mixture of ortho and para-nitrophenols is:
1. | Chromatography | 2. | Crystallization |
3. | Steam distillation | 4. | Sublimation |
HgCl2 and I2 both, when dissolved in water containing ions the pair of species formed is:
1.
2.
3.
4.
Mixture of chloroxylenol and terpineol acts as:
1. Antiseptic
2. Antipyretic
3. Antibiotic
4. Analgesic
An example of a sigma bonded organometallic compound is:
1. Grignard's reagent
2. Ferrocene
3. Cobaltocene
4. Ruthenocene
A first-order reaction has a specific reaction rate of
10-2 sec-1. How much time will it take for 20 g of the reactant to reduce to 5 g?
1. | 138.6 sec | 2. | 346.5 sec |
3. | 693.0 sec | 4. | 238.6 sec |
Column-I | Column-II |
(A) XX’ | (i) T-shape |
(B) XX’3 | (ii) Pentagonal bipyramidal |
(C) XX’5 | (iii) Linear |
(D) XX’7 | (iv) Square Pyramidal |
(A) | (B) | (C) | (D) | |
1. | (iii) | (i) | (iv) | (ii) |
2. | (i) | (iv) | (iii) | (ii) |
3. | (iv) | (iii) | (ii) | (i) |
4. | (iii) | (iv) | (i) | (ii) |
The concentration of Ag+ ions in a saturated solution of Ag2C2O4 is 2.2 × 10-4 mol L-1.
The solubility product of Ag2C2O4 is:
1. | 2.66×10-12 | 2. | 4.5×10-11 |
3. | 5.3×10-12 | 4. | 2.42×10-8 |
In the electrochemical cell:
the emf of this Daniel cell is E1. When the concentration of ZnSO4 is changed to 1.0 M and that of CuSO4 is changed to 0.01 M, the emf changes to E2. From the following, which one is the relationship between E1 and E2 ?
(Given, \(\frac{RT}{F}\) = 0.059)
1.
2.
3.
4.
Choose the pairs of isoelectronic compounds which are isostructural:
1. TeF2, XeF2
2. IBr2-, XeF2
3. IF3, XeF2
4. BeCl2, XeF2
The IUPAC name of the compound is:
1. 5-formylhex-2-en-3-one
2. 5-methyl-4-2-en-5-el
3. 3-keto-2-methylhex-5-enal
4. 3-keto-2-methylhex-4-enal
Incorrect statement among the following is:
1. | The uncertainty principle is\(\Delta x \cdot \Delta p \geq \frac{h}{4 \pi} \) |
2. | Half-filled and fully filled orbitals have greater stability due to greater exchange energy, greater symmetry, and a more balanced arrangement. |
3. | The energy of the 2s orbital is less than the energy of the 2p orbital in the case of hydrogen-like atoms. |
4. | De-Broglie's wavelength is given by\(\lambda=\frac{h}{m v} \), where m= mass of the particle, v = group velocity of the particle. |
The incorrect statement among the following is -
1. | Density decreases in case of crystals with Schottky's defect. |
2. | NaCl(s) is insulator, silicon is semiconductor, silver is conductor, quartz is piezo electric crystal. |
3. | Frenkel defect is favoured in those ionic compounds in which sizes of cations and anions have large difference. |
4. | \(Fe_{0.98}O\) has non stoichiometric metal excess defect. |
Which of the following species has a bond angle of \(120^\circ\)?
1. \({SF}_6\)
2. \(NCl_3\)
3. \(BCl_3\)
4. \(PH_3\)
For a given reaction, ∆H = 35.5 kJ mol-1 and ∆S = 83.6 J K-1 mol-1 . The reaction is spontaneous at:
(Assume that ∆H and ∆S do not vary with temperature)
1. T > 425K
2. All temperatures
3. T > 298K
4. T<425K
In humans, the main oxygen carrier in the blood is -
1. Hemocyanin
2. Proteins
3. Haemoglobin
4. Both microorganisms and haemoglobin.
If the molality of the dilute solution is doubled, the value of molal depression constant (Kf) will be-
1. Halved
2. Tripled
3. Unchanged
4. Doubled
Which of the following is dependent on temperature?
1. | Molarity | 2. | Mole fraction |
3. | Weight percentage | 4. | Molality |
The incorrect statement among the following is:
1. | The value of the equilibrium constant is changed in the presence of a catalyst in the reaction at equilibrium |
2. | Enzymes catalyze mainly bio-chemical reactions |
3. | Coenzymes increase the catalytic activity of the enzyme |
4. | The catalyst does not initiate any reaction |
Identify A and predict the type of reaction
1. | |
2. | |
3. | |
4. |
The correct order of the stoichiometries of AgCl formed when AgNO3 in excess is treated with the complexes
CoCl3.6NH3, CoCl3.5NH3, CoCl3.4NH3 respectively is:
1. 3AgCl, 1AgCl, 2AgCl
2. 3AgCl, 2AgCl, 1AgCl
3. 2AgCl, 3AgCl, 1AgCl
4. 1AgCl, 3AgCl, 2AgCl
The correct statement regarding electrophile is :
1. | Electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from another electrophile |
2. | Electrophiles are generally neutral species and can form a bond by accepting a pair of electrons from a nucleophile |
3. | Electrophiles can be either neutral or positively charged species and can form a bond accepting a pair of electrons from a nucleophile |
4. | Electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from a nucleophile |
A gas is allowed to expand in a well insulated container against a constant external pressure of 2.5atm from an initial volume of 2.50 L to a final volume of 4.50L. The change in internal energy U of the gas in joules will be:
1. -500J
2. -505J
3. -506J
4. -508J
Mark the correct reaction among the following to convert acetamide to methenamine:
1. Hoffmann bromamide reaction
2. Stephens reaction
3. Gabriels phthalimide synthesis
4. Carbylamine reaction
With respect to the conformers of ethane, which of the following statements is true?
1. | Bond angle changes but bond length remains the same |
2. | Both bond angle and bond length change |
3. | Both bond angle and bond length remain the same |
4. | Bond angle remains the same but the bond length changes |
In which pair of ions both the species contain S-S bond?
1.
2.
3.
4.
The correct statement among the following is :
1. | Sn2+ is an oxidizing agent while Pb4+ is a reducing agent. |
2. | Sn2+ and Pb2+ both are oxidizing agents. |
3. | Sn4+ is a reducing agent while Pb4+ is an oxidizing agent. |
4. | Sn2+ is a reducing agent while Pb4+ is an oxidizing agent. |
The correct increasing order for the wavelengths of absorption in complexes of Co3+ is:
1. [Co(H2O)6]3+ < [Co(en)3]3+ < [Co(NH3)6]3 +
2. [Co(H2O)6]3+ < [Co(NH3)6]3+ < [Co(en)3]3+
3. [Co(NH3)6]3+ < [Co(en)3]3+ < [Co(H2O)6]3+
4. [Co(en)3]3+ < [Co(NH3)6]3+ < [Co(H2O)6]3+
A, X, Y, and Z in the above-mentioned reaction are:
A | X | Y | Z | |
1. | Methoxy- methane |
Ethanol | Ethanoic acid | Semicarbazone |
2. | Ethanal | Ethanol | But - 2 - enal | semicarbazone |
3. | Ethanol | Acetaldehyde | Butanone | Hydrazone |
4. | Methoxy- methane |
Ethanoic acid | Acetate | Hydrazine |
Which product is generated when cyclohexanone undergoes
aldol condensation and is subsequently heated?
1. | 2. | ||
3. | 4. |
Which of the following pairs of species have the same bond order?
1.
2.
3.
2. CO, NO
Extraction of gold and silver involves leaching with CN- ion. Silver is later recovered by:
1. Distillation
2. Zone refining
3. Displacement with Zn
4. Liquation
A 20-litre container at 400 K contains CO2 (g) at pressure 0.4 atm and an excess of SrO (neglecting the volume of solid SrO). The volume of the container is now decreased by moving the movable piston fitted in the container.
The maximum volume of the container, when the pressure of CO2 attains its maximum value will be:
(Given that: SrCO3(s) ⇋ SrO(s) + CO2(g) , Kp = 1.6 atm)
1. | 10 litre | 2. | 2 litre |
3. | 4 litre | 4. | 5 litre |
The correct statement among the following regarding [Mn(CN)6]3-is:
1. It is sp3d2 hybridized and tetrahedral.
2. It is d2sp3 hybridized and octahedral.
3. It is dsp2 hybridised and square planar.
4. It is sp3d2 hybridised and octahedral.
The reason for a greater range of oxidation states in actinoids is attributed to:
1. Actinoid contraction
2. 5f, 6d and 7s levels having comparable energies.
3. 4f and 5d levels being close in energies.
4. The radioactive nature of actinoids
Which of the following statements is not correct?
1. | Ovalbumin is a simple food reserve in egg white. |
2. | Blood proteins thrombin and fibrinogen are involved in blood clotting. |
3. | Denaturation makes the proteins more active. |
4. | Insulin maintains sugar level in the blood of the human body. |
A spring of force constant \(k\) is cut into lengths of ratio \(1:2:3\). They are connected in series and the new force constant is \(k'\). Then they are connected in parallel and force constant is \(k''\). Then \(k':k''\) is:
1. \(1:9\)
2. \(1:11\)
3. \(1:14\)
4. \(1:6\)
The ratio of resolving powers of an optical microscope for two wavelengths =4000 and is:
1. 9:4
2. 3:2
3. 16:81
4. 8:27
The two nearest harmonics of a tube closed at one end and open at the other end are \(220\) Hz and \(260\) Hz. What is the fundamental frequency of the system?
1. \(20\) Hz
2. \(30\) Hz
3. \(40\) Hz
4. \(10\) Hz
Consider a drop of rainwater having a mass of \(1~\text{gm}\) falling from a height of \(1~\text{km}\). It hits the ground with a speed of \(50~\text{m/s}\). Take \(g\) as constant with a value \(10~\text{m/s}^2.\) The work done by the
(i) gravitational force and the
(ii) resistive force of air is:
1. | \((\text{i})~1.25~\text{J};\) \((\text{ii})~-8.25~\text{J}\) |
2. | \((\text{i})~100~\text{J};\) \((\text{ii})~8.75~\text{J}\) |
3. | \((\text{i})~10~\text{J};\) \((\text{ii})~-8.75~\text{J}\) |
4. | \((\text{i})~-10~\text{J};\) \((\text{ii})~-8.75~\text{J}\) |
A physical quantity of the dimensions of length that can be formed out of \(c, G,~\text{and}~\frac{e^2}{4\pi\varepsilon_0}\)is [\(c\) is the velocity of light, \(G\) is the universal constant of gravitation and \(e\) is charge]:
\(1. ~c^2\left[G \frac{e^2}{4 \pi \varepsilon_0}\right]^{\frac{1}{2}}\\
2.~ \frac{1}{c^2}\left[\frac{e^2}{4 G \pi \varepsilon_0}\right]^{\frac{1}{2}}\\
3. ~\frac{1}{c} G \frac{e^2}{4 \pi \varepsilon_0}\\
4. ~\frac{1}{c^2}\left[G \frac{e^2}{4 \pi \varepsilon_0}\right]^{\frac{1}{2}}\)
Two rods \(A\) and \(B\) of different materials are welded together as shown in the figure. Their thermal conductivities are \(K_1\) and \(K_2.\) The thermal conductivity of the composite rod will be:
1. \(\frac{3(K_1+K_2)}{2}\)
2. \(K_1+K_2\)
3. \(2(K_1+K_2)\)
4. \(\frac{(K_1+K_2)}{2}\)
A capacitor is charged by a battery. The battery is removed and another identical uncharged capacitor is connected in parallel. The total electrostatic energy of the resulting system:
1. | decreases by a factor of \(2\) |
2. | remains the same |
3. | increases by a factor of \(2\) |
4. | increases by a factor of \(4\) |
In a common-emitter transistor amplifier, the audio signal voltage across the collector is 3V. The resistance of the collector is 3k. If the current gain is 100 and the base resistance is 2k, the voltage and power gain of the amplifier are:
1. 15 and 200
2. 150 and 15000
3. 20 and 2000
4. 200 and 1000
Thermodynamic processes are indicated in the following diagram:
Match the following:
Column-I | Column-II | ||
P. | Process I | a. | Adiabatic |
Q. | Process II | b. | Isobaric |
R. | Process III | c. | Isochoric |
S. | Process IV | d. | Isothermal |
P | Q | R | S | |
1. | c | a | d | b |
2. | c | d | b | a |
3. | d | b | a | c |
4. | a | c | d | b |
Suppose the charge of a proton and an electron differ slightly. One of them is \(-e\), the other is (\(e+\Delta e\)). If the net of electrostatic force and gravitational force between two hydrogen atoms placed at a distance \(d\) (much greater than atomic size) apart is zero, then \(\Delta e\) is of the order of? (Given mass of hydrogen \(m_h = 1.67\times 10^{-27}~\text{kg}\))
1. \(10^{-23}~\text{C}\)
2. \(10^{-37}~\text{C}\)
3. \(10^{-47}~\text{C}\)
4. \(10^{-20}~\text{C}\)
The given electrical network is equivalent to:
1. \(\mathrm{OR}\) gate
2. \(\mathrm{NOR}\) gate
3. \(\mathrm{NOT}\) gate
4. \(\mathrm{AND}\) gate
Which one of the following represents the forward bias diode?
1. | |
2. | |
3. | |
4. |
A long solenoid of diameter \(0.1\) m has \(2 \times 10^4\) turns per meter. At the center of the solenoid, a coil of \(100\) turns and radius \(0.01\) m is placed with its axis coinciding with the solenoid axis. The current in the solenoid reduces at a constant rate to \(0\) A from \(4\) A in \(0.05\) s. If the resistance of the coil is \(10\pi^2~\Omega\) then the total charge flowing through the coil during this time is:
1. \(16~\mu \text{C}\)
2. \(32~\mu \text{C}\)
3. \(16\pi~\mu \text{C}\)
4. \(32\pi~\mu \text{C}\)
Preeti reached the metro station and found that the escalator was not working. She walked up the stationary escalator in time \(t_1\). On other days, if she remains stationary on the moving escalator, then the escalator takes her up in time \(t_2\). The time taken by her to walk upon the moving escalator will be:
1. \(\frac{t_1t_2}{t_2-t_1}\)
2. \(\frac{t_1t_2}{t_2+t_1}\)
3. \(t_1-t_2\)
4. \(\frac{t_1+t_2}{2}\)
A beam of light from a source \(L\) is incident normally on a plane mirror fixed at a certain distance \(x\) from the source. The beam is reflected back as a spot on a scale placed just above the source \(L\). When the mirror is rotated through a small angle \(\theta,\) the spot of the light is found to move through a distance \(y\) on the scale. The angle \(\theta\) is given by:
1. \(\frac{y}{x}\)
2. \(\frac{x}{2y}\)
3. \(\frac{x}{y}\)
4. \(\frac{y}{2x}\)
If \(\phi_1\) and \(\phi_2\) are the apparent angles of dip observed in two vertical planes at right angles to each other, then the true angle of dip \(\phi\) is given by:
1. \(cos^2{\phi}=cos^2{\phi_1}+cos^2{\phi_2}\)
2. \(sec^2{\phi}=sec^2{\phi_1}+sec^2{\phi_2}\)
3. \(tan^2{\phi}=tan^2{\phi_1}+tan^2{\phi_2}\)
4. \(cot^2{\phi}=cot^2{\phi_1}+cot^2{\phi_2}\)
Two cars moving in opposite directions approach each other at speeds of 22 m/s and 16.5 m/s, respectively. The driver of the first car blows a horn with a frequency of 400 Hz. The frequency heard by the driver of the second car is [assume velocity of sound to be 340 m/s]:
1. 361 Hz
2. 411 Hz
3. 448 Hz
4. 350 Hz
A massless and inextensible string connects two blocks \(\mathrm{A}\) and \(\mathrm{B}\) of masses \(3m\) and \(m,\) respectively. The whole system is suspended by a massless spring, as shown in the figure. The magnitudes of acceleration of \(\mathrm{A}\) and \(\mathrm{B}\) immediately after the string is cut, are respectively:
1. | \(\frac{g}{3},g\) | 2. | \(g,g\) |
3. | \(\frac{g}{3},\frac{g}{3}\) | 4. | \(g,\frac{g}{3}\) |
A thin prism having refracting angle \(10^\circ\) is made of glass of a refractive index \(1.42\). This prism is combined with another thin prism of glass with a refractive index \(1.7\). This combination produces dispersion without deviation. The refracting angle of the second prism should be:
1. \(6^{\circ}\)
2. \(8^{\circ}\)
3. \(10^{\circ}\)
4. \(4^{\circ}\)
The acceleration due to gravity at a height \(1~\text{km}\) above the earth's surface is the same as at a depth \(d\) below the surface of the earth. Then:
1. | \(d= 1~\text{km}\) | 2. | \(d= \frac{3}{2}~\text{km}\) |
3. | \(d= 2~\text{km}\) | 4. | \(d= \frac{1}{2}~\text{km}\) |
A potentiometer is an accurate and versatile device to make electrical measurements of E.M.F. because the method involves:
1. | the potential gradients. |
2. | a condition of no current flow through the galvanometer. |
3. | a condition of cells, galvanometer, and resistances. |
4. | the cells. |
A spherical black body with a radius of \(12\) cm radiates \(450\) W power at \(500\) K. If the radius were halved and the temperature is doubled, the power radiated in watts would be:
1. \(450\)
2. \(1000\)
3. \(1800\)
4. \(225\)
The figure shows a circuit that contains three identical resistors with resistance \(R = 9.0~\Omega\) each, two identical inductors with inductance \(L = 2.0~\text{mH}\) each, and an ideal battery with emf \(\varepsilon = 18~\text{V}\). The current \('i'\) through the battery just after the switch is closed will be:
1. \(0.2~\text{A}\)
2. \(2~\text{A}\)
3. \(4~\text{A}\)
4. \(2~\text{mA}\)
Radioactive material 'A' has decay constant '8\(\lambda\)' and material 'B' has a decay constant '\(\lambda\)'. Initially, they have the same number of nuclei. After what time, the ratio of the number of nuclei of material 'A' to that of 'B' will be \(\frac{1}{e}\)?
\(1 . \frac{1}{7 \lambda}\)
\(2 . \frac{1}{8 \lambda}\)
\(3 . \frac{1}{9 \lambda}\)
\(4 . \frac{1}{\lambda}\)
The diagrams below show regions of equipotential.
A positive charge is moved from \(\mathrm{A}\) to \(\mathrm{B}\) in each diagram. Choose the correct statement from the options given below:
1. | in all four cases, the work done is the same. |
2. | minimum work is required to move \(q\) in figure (a). |
3. | maximum work is required to move \(q\) in figure (b). |
4. | maximum work is required to move \(q\) in figure (c). |
Two astronauts are floating in gravitation-free space after having lost contact with their spaceship. The two will:
1. | move towards each other. |
2. | move away from each other. |
3. | become stationary. |
4. | keep floating at the same distance between them. |
The \(x\) and \(y\) coordinates of the particle at any time are \(x=5 t-2 t^2\) and \({y}=10{t}\) respectively, where \(x\) and \(y\) are in meters and \(\mathrm{t}\) in seconds. The acceleration of the particle at \(\mathrm{t}=2\) s is:
1. | \(5\hat{i}~\text{m/s}^2\) | 2. | \(-4\hat{i}~\text{m/s}^2\) |
3. | \(-8\hat{j}~\text{m/s}^2\) | 4. | \(0\) |
One end of the string of length \(l\) is connected to a particle of mass \(m\) and the other end is connected to a small peg on a smooth horizontal table. If the particle moves in a circle with speed \(v\), the net force on the particle (directed towards the center) will be: (\(T\) represents the tension in the string)
1. \(T+\frac{m v^2}{l}\)
2. \(T-\frac{m v^2}{l}\)
3. zero
4. \(T\)
A particle executes linear simple harmonic motion with amplitude of \(3~\text{cm}\). When the particle is at \(2~\text{cm}\) from the mean position, the magnitude of its velocity is equal to that of its acceleration. Then its time period in seconds is:
1. \(\frac{\sqrt5}{2\pi}\)
2. \(\frac{4\pi}{\sqrt5}\)
3. \(\frac{4\pi}{\sqrt3}\)
4. \(\frac{\sqrt5}{\pi}\)
Two polaroids \(P_1\) and \(P_2\) are placed with their axis perpendicular to each other. Unpolarised light of intensity \(I_0\) is incident on \(P_1\). A third polaroid \(P_3\) is kept in between \(P_1\) and \(P_2\) such that its axis makes an angle \(45^\circ\) with that of \(P_1\). The intensity of transmitted light through \(P_2\) is:
1. \(\frac{I_0}{4}\)
2. \(\frac{I_0}{8}\)
3. \(\frac{I_0}{16}\)
4. \(\frac{I_0}{2}\)
The bulk modulus of a spherical object is \(B.\) If it is subjected to uniform pressure \(P,\) the fractional decrease in radius is:
1. \(\frac{B}{3P}\)
2. \(\frac{3P}{B}\)
3. \(\frac{P}{3B}\)
4. \(\frac{P}{B}\)
In an electromagnetic wave in free space, the root mean square value of the electric field is \(E_{\text{rms}} = 6~\text{V/m}\). The peak value of the magnetic field is:
1. \(2.83\times 10^{-8}~\text{T}\)
2. \(0.70\times 10^{-8}~\text{T}\)
3. \(4.23\times 10^{-8}~\text{T}\)
4. \(1.41\times 10^{-8}~\text{T}\)
A rope is wrapped around a hollow cylinder with a mass of \(3\) kg and a radius of \(40\) cm. What is the angular acceleration of the cylinder if the rope is pulled with a force of \(30\) N?
1. \(0.25 ~\text{rad/s}^2 \)
2. \(25 ~\text{rad/s}^2 \)
3. \(5 ~\text{m/s}^2 \)
4. \(25 ~\text{m/s}^2 \)
Two discs of the same moment of inertia are rotating about their regular axis passing through centre and perpendicular to the plane of the disc with angular velocities \(\omega_1\) and \(\omega_2\). They are brought into contact face to face with their axis of rotation coinciding. The expression for loss of energy during this process is:
1. \(\frac{1}{4}I\left(\omega_1-\omega_2\right)^2\)
2. \(I\left(\omega_1-\omega_2\right)^2\)
3. \(\frac{1}{8}I\left(\omega_1-\omega_2\right)^2\)
4. \(\frac{1}{2}I\left(\omega_1-\omega_2\right)^2\)
The photoelectric threshold wavelength of silver is \(3250\times 10^{-10}~\text{m}\). What will be the velocity of the electron ejected from a silver surface by the ultraviolet light of wavelength \(2536\times 10^{-10}~\text{m}\)? (Given \(h= 4.14\times 10^{-15}~\text{eVs}\) and \(c= 3\times 10^{8}~\text{m/s}\))
1. \(\approx 0.6\times 10^{6}~\text{m/s}\)
2. \(\approx 61\times 10^{3}~\text{m/s}\)
3. \(\approx 0.3\times 10^{6}~\text{m/s}\)
4. \(\approx 0.3\times 10^{5}~\text{m/s}\)
A \(250\) turn rectangular coil of length \(2.1\) cm and width \(1.25\) cm carries a current of \(85~\mu\text{A}\) and subjected to the magnetic field of strength \(0.85~\text{T}\). Work done for rotating the coil by \(180^\circ\) against the torque is:
1. \(4.55~\mu\text{J} \)
2. \(2.3~\mu\text{J} \)
3. \(1.15~\mu\text{J} \)
4. \(9.4~\mu\text{J} \)
The ratio of wavelengths of the last line of Balmer series and the last line of Lyman series is:
1. \(1\)
2. \(4\)
3. \(0.5\)
4. \(2\)
A Carnot engine having an efficiency of \(\frac{1}{10}\) as heat engine, is used as a refrigerator. If the work done on the system is \(10\) J, the amount of energy absorbed from the reservoir at a lower temperature is:
1. \(90\) J
2. \(99\) J
3. \(100\) J
4. \(1\) J
A gas mixture consists of \(2\) moles of \(O_2\) and \(4\) moles of \(Ar\) at temperature \(T.\) Neglecting all the vibrational modes, the total internal energy of the system is:
1. | \(15RT\) | 2. | \(9RT\) |
3. | \(11RT\) | 4. | \(4RT\) |
An arrangement of three parallel straight wires placed perpendicular to the plane of paper carrying the same current in the same direction is shown in the figure. The magnitude of force per unit length on the middle wire \(B\) is given by:
1. | \(\frac{\mu_0i^2}{2\pi d}\) | 2. | \(\frac{2\mu_0i^2}{\pi d}\) |
3. | \(\frac{\sqrt{2}\mu_0i^2}{\pi d}\) | 4. | \(\frac{\mu_0i^2}{\sqrt{2}\pi d}\) |
A U-tube with both ends open to the atmosphere is partially filled with water. Oil, which is immiscible with water, is poured into one side until it stands at a level of \(10~\text{mm}\) above the water level on the other side. Meanwhile, the water rises by \(65~\text{mm}\) from its original level (see diagram). The density of the oil is:
1. \(425~\text{kg m}^{-3}\)
2. \(800~\text{kg m}^{-3}\)
3. \(928~\text{kg m}^{-3}\)
4. \(650~\text{kg m}^{-3}\)
Which of the following statements are correct?
a. | centre of mass of a body always coincides with the centre of gravity of the body . |
b. | centre of gravity of a body is the point about which the total gravitational torque on the body is zero. |
c. | a couple on a body produce both translational and rotation motion in a body. |
d. | mechanical advantage greater than one means that small effort can be used to lift a large load. |
1. | (a) and (b) | 2. | (b) and (c) |
3. | (c) and (d) | 4. | (b) and (d) |
The de-Broglie wavelength of a neutron in thermal equilibrium with heavy water at a temperature \(T\) (kelvin) and mass \(m\), is:
1. \(\frac{h}{\sqrt{mkT}}\)
2. \(\frac{h}{\sqrt{3mkT}}\)
3. \(\frac{2h}{\sqrt{3mkT}}\)
4. \(\frac{2h}{\sqrt{mkT}}\)