Which one of the following shows isogamy with non-flagellated gametes?
1. Sargassum
2. Ectocarpus
3. Ulothrix
4. Spirogyra
Five kingdom system of classification suggested by R.H. Whittaker is based on:
1. Complexity of body organisation
2. Mode of reproduction
3. Mode of nutrition
4. All of the above
Which one of the following fungi contains hallucinogens?
1. Morchella esculenta
2. Amanita muscaria
3. Neurospora sp.
4. Ustilago sp.
Archaebacteria differ from eubacteria in:
1. | Cell membrane structure | 2. | Mode of nutrition |
3. | Cell shape | 4. | Mode of reproduction |
Which one of the following is wrong about Chara?
1. upper oogonium and lower round antheridium
2. Globule and nucule present on the same plant
3. Upper antheridium and lower oogonium
4. Globule is male reproductive structure
Which of the following is responsible for peat formation?
1. Marchantia
2. Riccia
3. Funaria
4. Sphagnum
Placenta and pericarp are both edible portions in:
1. Apple
2. Banana
3. Tomato
4. Potato
When the margins of sepals or petals overlap one another without any particular direction, the condition is termed as:
1. Vexillary
2. Imbricate
3. Twisted
4. Valvate
You are given a fairly old piece of dicot stem and a dicot root. Which of the following anatomical structures will you use to distinguish between the two?
1. Secondary xylem
2. Secondary phloem
3. Protoxylem
4. Cortical cells
Which one of the following statements is correct?
1. | The seed in grasses is not endospermic |
2. | Mango is a parthenocarpic fruit |
3. | A proteinaceous aleurone layer is present in maize grain. |
4. | A sterile pistil is called a staminode. |
Tracheids differ from the tracheary elements in:
1. Having casparian strips
2. Being imperforate
3. Lacking nucleus
4. Being lignified
Example of an edible underground stem is:
1. Carrot
2. Groundnut
3. Sweet potato
4. Potato
Which of the following structures performs the function of mitochondria in a bacteria?
1. | Nucleoid | 2. | Ribosomes |
3. | Cell wall | 4. | Mesosomes |
The solid linear cytoskeletal elements having a diameter of 6 nm and made up of a single type of monomer are known as:
1. Microtubules
2. Microfilaments
3. Intermediate filaments
4. Lamins
The osmotic expansion of a cell kept in water is chiefly regulated by:
1. Mitochondria
2. Vacuoles
3. Plastids
4. Ribosomes
During which phase(s) of the cell cycle, amount of DNA in a cell remains at 4 C level if the initial amount is denoted as 2C:
1. G0 and G1
2. G1 and S
3. Only G2
4. G2 and M
Match the following and select the correct answer:
Column I | Column II | ||
(a) | Centriole | (i) | Infoldings in mitochondria |
(b) | Chlorophyll | (ii) | Thylakoids |
(c) | Cristae | (iii) | Nucleic acids |
(d) | Ribozymes | (iv) | Basal body of cilia or flagella |
1. A-iv, B-ii, C-i, D-iii
2. A-i, B-ii, C-iv, D-iii
3. A-i, B-iii, C-ii, D-iv
4. A-iv, B-iii, C-i, D-ii
Dr. F. Went noted that if coleoptile tips were removed and placed on agar for one hour, the agar would produce a bending when placed on one side of freshly - cut coleoptile stumps. What is the significance of this experiment?
1. | It made possible the isolation and exact identification of auxin. |
2. | It is the basis for the quantitative determination of small amounts of growth-promoting substances. |
3. | It supports the hypothesis that IAA is auxin. |
4. | It demonstrates the polar movements of auxins. |
Deficiency symptoms of nitrogen and potassium are visible first in:
1. Senescent leaves
2. Young leaves
3. Roots
4. Buds
In which one of the following processes CO2 is not released?
1. Aerobic respiration in plants
2. Aerobic respiration in animals
3. Alcoholic fermentation
4. Lactate fermentation
Anoxygenic photosynthesis is characteristic of:
1. Rhodospirillum
2. Spirogyra
3. Chlamydomonas
4. Ulva
A few normal seedlings of a tomato were kept in a dark room. After a few days, they were found to have become white-coloured like albinos, Which of the following terms will you use to describe them?
1. Mutated
2. Embolised
3. Etiolated
4. Defoliated
Which one of the following growth regulators is known as the stress hormone?
1. Abscisic acid
2. Ethylene
3. GA3
4. Indole acetic acid
Geitonogamy involves:
1. | Pollination of a flower by the pollen from another flower of the same plant. |
2. | Pollination of a flower by the pollen from another same flower. |
3. | Pollination of a flower by the pollen from a flower of another plant in the same population. |
4. | Pollination of a flower by the pollen from a flower of another plant belonging to a distant population. |
Male gametophyte with least number of cells is present in:
1. Pteris
2. Funaria
3. Lilium
4. Pinus
An aggregate fruit is one which develops from:
1. Multicarpellary syncarpous gynoecium
2. Multicarpellary apocarpous gynoecium
3. Complete inflorescence
4. Multicarpellary superior ovary
Pollen tablets are available in the market for:
1. | In vitro fertilization | 2. | Breeding programmes |
3. | Supplementing food | 4. | Ex-situ conservation |
Function of filiform apparatus is to:
1. | Recognize the suitable pollen at the stigma |
2. | Stimulate division of generative cell |
3. | Producer nectar |
4. | Guide the entry of the pollen tube |
Non- albuminous seed is produced in:
1. Maize
2. Castor
3. Wheat
4. Pea
Which of the following shows coiled RNA strand and capsomeres?
1. | Poliovirus | 2. | Tobacco mosaic virus |
3. | Measles virus | 4. | Retrovirus |
Which one of the following is wrongly matched?
1. | Transcription- Writing information from DNA to t-RNA |
2. | Translation- Using the information in m-RNA to make protein |
3. | Repressor protein- Binds to an operator to stop enzyme synthesis |
4. | Operon- Structural genes, operator, and promoter |
Transformation was discovered by:
1. Meseson and Stahl
2. Hershey and Chase
3. Griffith
4. Waston and crick
Fruit colour in squash is an example of:
1. Recessive epistasis
2. Dominant epistasis
3. Complementary genes
4. Inhibitory genes
Viruses have:
1. DNA enclosed in a protein coat
2. Prokaryotic nucleus
3. Single chromosome
4. Both DNA and RNA
The first human hormone produced by recombinant DNA technology is:
1. Insulin
2. Estrogen
3. Thyroxin
4. Progesterone
An analysis of chromosomal DNA using the Southern hybridization technique does not use:
1. Electrophoresis
2. Blotting
3. Autoradiography
4. PCR
In vitro clonal propagation in plants is characterized by:
1. PCR and RAPD
2. Northern blotting
3. Electrophoresis and HPLC
4. Microscopy
An alga which can be employed as food for human beings:
1. Ulothrix
2. Chlorella
3. Spirogyra
4. Polysiphonia
Which vector can clone only a small fragment of DNA?
1. Bacterial artificial chromosome
2. Yeast artificial chromosome
3. Plasmid
4. Cosmid
An example of ex-situ conservation is:
1. National park
2. Seed bank
3. Wildlife sanctuary
4. Sacred grove
A location with luxuriant growth of lichens on the trees indicates that the:
1. Trees are very healthy
2. Trees are heavily infested
3. Location is highly polluted
4. Location is not polluted
Match the following and select the correct option:
Column I | Column II | ||
(a) | Earthworm | (i) | Pioneer species |
(b) | Succession | (ii) | Detrivore |
(c) | Ecosystem service | (iii) | Natality |
(d) | Population growth | (iv) | Pollination |
1. A-(i), B-(ii), C-(iii), D-(iv)
2. A-(i), B-(ii), C-(iii), D-(iv)
3. A-(iii), B-(ii), C-(iv), D-(i)
4. A-(ii), B-(i), C-(iv), D-(iii)
A species facing extremely high risk of extinction in the immediate future is called:
1. Vulnerable
2. Endemic
3. Critically Endangered
4. Extinct
The zone of atmosphere in which the ozone layer is present is called:
1. Ionosphere
2. Mesosphere
3. Stratosphere
4. Troposphere
The organisation which publishes the Red List of species is:
1. | ICFRE | 2. | IUCN |
3. | UNEP | 4. | WWF |
Select the Taxon mentioned that represents both marine and freshwater species:
1. Echinoderms
2. Ctenophora
3. Cephalochordata
4. Cnidaria
Which one of the following living organisms completely lacks a cell wall?
1. Cyanobacteria
2. Sea- fan (Gorgonia)
3. Saccharomyces
4. Coelenterata algae
Planaria possess a high capacity of:
1. metamorphosis
2. regeneration
3. alternation of generation
4. bioluminescence
A marine cartilaginous fish that can produce electric current is:
1. Pristis
2. Torpedo
3. Trygon
4. Scoliodon
Choose the correctly matched pair:
1. Tendon-Specialized connective tissue
2. Adipose tissue-Dense connective tissue
3. Areolar tissue- Loose connective tissue
4. Cartilage- Loose connective tissue
Choose the correctly matched pair:
1. Inner lining of salivary ducts- Ciliated epithelium
2. Moist surface of buccal cavity- Glandular epithelium
3. Tubular parts of nephrons- Cuboidal epithelium
4. Inner surface of bronchioles- Squamous epithelium
In the 'S' phase of the cell cycle:
1. amount of DNA doubles in each cell.
2. amount of DNA remains the same in each cell
3. chromosome number is increased
4. amount of DNA is reduced to half in each cell.
The motile bacteria are able to move by:
1. fimbriae
2. flagella
3. cilia
4. pili
Select the option which is not correct with respect to enzyme action:
1. | Substrate binds with the enzyme at its active site. |
2. | Addition of a lot of succinate does not reverse the inhibition of succinic dehydrogenase by malonate |
3. | A non-competitive inhibitor binds the enzyme at a site distinct from that which binds the substrate |
4. | Malonate is a competitive inhibitor of succinic dehydrogenase |
Which one of the following is a non-reducing carbohydrate?
1. Maltose
2. Sucrose
3. Lactose
4. Ribose 5-phosphate
The enzyme recombinase is required at which stage of meiosis:
1. Pachytene
2. Zygotene
3. Diplotene
4. Diakinesis
The initial step in the digestion of milk in an infant is carried out by:
1. Lipase | 2. Trypsin |
3. Rennin | 4. Pepsin |
Fructose is absorbed into the blood through mucosa cells of intestine by the process called:
1. Active transport
2. Facilitated transport
3. Simple diffusion
4. Co-transport mechanism
Approximately seventy percent of carbon dioxide absorbed by the blood will be transported to the lungs:
1. | as bicarbonate ions |
2. | in the form of dissolved gas molecules |
3. | by binding to R.B.C |
4. | as carbamino-haemoglobin |
Person with blood group AB is considered as universal recipient because he has:
1. | both A and B antigens on RBC but no antibodies in the plasma |
2. | both A and B antibodies in the plasma |
3. | no antigen on RBC and no antigens in the plasma |
4. | both A and B antigens in the plasma but no antibodies |
How do parasympathetic neural signals affect the working of the heart?
1. | reduce both heart rate and cardiac output |
2. | Heart rate is increased without affecting the cardiac output |
3. | Both heart rate and cardiac output increased |
4. | Heart rate decreases but cardiac output increases |
Which of the following causes an increase in sodium reabsorption in distal convoluted tubule?
1. Increase in aldosterone levels
2. Increase in antidiuretic hormone levels
3. Decrease in aldosterone levels
4. Decrease in antidiuretic hormone levels
Select the correct matching of the types of the joint with the example in the human skeletal system:
Types of joint | Examples | |
1. | Cartilaginous joint | between frontal and parietal |
2. | Pivot joint | between third and fourth cervical vertebrae |
3. | Hinge joint | between the humerus and pectoral girdle |
4. | Gliding joint | between carpals |
1. 1
2. 2
3. 3
4. 4
Stimulation of a muscle fiber by a motor neuron occurs at:
1. the neuromuscular junction
2. the transverse tubules
3. the myofibril
4. the sarcoplasmic reticulum
Injury localized to the hypothalamus would most likely disrupt:
1. short-term memory
2. co-ordination during locomotion
3. executive functions, such as decision making
4. regulation of body temperature
Which one of the following statements is not correct?
1. | Retinal is the light-absorbing portion of visual photo pigments |
2. | In retina, the rods have the photopigments rhodopsin while cones have three different photopigments. |
3. | Retinal is a derivative of Vitamin C |
4. | Rhodopsin is the purplish protein present in rods only. |
Identify the hormone with its correct matching of source and function:
1. | Oxytocin- posterior pituitary, growth and maintenance of mammary glands. |
2. | Melatonin- pineal gland, regulates the normal rhythm of sleep-wake cycle. |
3. | Progesterone- corpus-luteum, stimulation of growth and activities of female secondary sex organs. |
4. | Atrial natriuretic factor- ventricular wall increases blood pressure. |
Fight - or - flight reaction cause activation of:
1. | the parathyroid glands, leading to increased metabolic rate. |
2. | the kidney, leading to suppression of the rennin angiotensin-aldosterone pathway. |
3. | the adrenal medulla, leading to increased secretion of epinephrine and norepinephrine |
4. | the pancreas leading to a reduction in blood sugar levels. |
The shared terminal duct of the reproductive and urinary system in the human male is:
1. Urethra
2. Ureter
3. Vas deferens
4. Vasa efferentia
The main function of mammalian corpus luteum is to produce:
1. Oestrogen only
2. progesterone
3. human chorionic gonadotropin
4. relaxin only
Select the correct option describing gonadotropin activity in a normal pregnant female:
1. | High level of FSH and LH stimulates the thickening of endometrium. |
2. | High level of FSH and LH facilitate implantation of the embryo |
3. | High level of hCG stimulates the synthesis if estrogen and progesterone |
4. | High level of hCG stimulates the thickening of the endometrium. |
Tubectomy is a method of sterilization in which:
1. small part of the fallopian tube is removed or tied up.
2. ovaries are removed surgically
3. small part of vas deferens is removed or tied up
4. uterus is removed surgically
Which of the following is a hormone-releasing intra Uterine Device (IUD)?
1. Multiload 375
2. LNG - 20
3. Cervical cap
4. Vault
Assisted reproductive technology, IVF involves the transfer of:
1. Ovum into the fallopian tube.
2. Zygote into the fallopian tube.
3. Zygote into the uterus
4. Embryo with 16 blastomeres into the fallopian tube.
A man whose father was colour blind marries a woman who had a colour blind mother and a normal father. What percentage of male children of this couple will be colour blind?
1. 25%
2. 0%
3. 50%
4. 75%
In a population of 1000 individuals, 360 belong to genotype AA, 480 to Aa and the remaining 160 to aa. Based on this data, the frequency of allele A in the population is:
1. 0.4
2. 0.5
3. 0.6
4. 0.7
A human female with Turner's syndrome:
1. has 45 chromosomes with XO
2. has one additional chromosome.
3. exhibit male character
4. is able to produce children with a normal husband.
Select the correct option:
Direction of RNA synthesis |
Direction of reading of the template DNA strand |
|
1. | 5'-3' | 3' - 5' |
2. | 3'-5' | 5' - 3' |
3. | 5' - 3' | 5' - 3' |
4. | 3' - 5' | 3' - 5' |
1. | 1 | 2. | 2 |
3. | 3 | 4. | 4 |
Commonly used vectors for human genome sequencing are:
1. | T-DNA | 2. | BAC and YAC |
3. | Expression Vectors | 4. | T/A cloning Vectors |
Forelimbs of cat, lizard used in walking; forelimbs of whale used in swimming and forelimbs of bats used in flying are an example of:
1. Analogous organs
2. Adaptive radiation
3. Homologous organs
4. Convergent evolution
Which one of the following are analogous structures?
1. Wing of Bat and Wings of Pigeon
2. Gills of Prawn and Lungs of Man
3. Thorns of Bougainvillea and Tendrils of Cucurbita
4. Flippers of Dolphin and Legs of Horse.
Which is the particular type of drug that is obtained from the plants whose one flowering branch is shown below?
1. | Hallucinogen | 2. | Depressant |
3. | Stimulant | 4. | Pain-Killer |
At which stage of HIV infection does one usually show symptoms of AIDS?
1. | Within 15 days of sexual contact with an infected person |
2. | When the infected retrovirus enters host cells |
3. | When HIV damages a large number of helper T - Plymphocytes. |
4. | When the viral DNA is produced by reverse transcriptase. |
To obtain virus-free healthy plants from a diseased one by tissue culture technique, which part/parts of the diseased plant will be taken?
1. | Apical meristem only |
2. | Palisade parenchyma |
3. | Both apical and axillary meristems |
4. | Epidermis only |
What gases are produced in anaerobic sludge digesters?
1. Methane and CO2
2. Methane, Hydrogen Sulphide and CO2
3. Methane, Hydrogen Sulphide and CO
4. Hydrogen Sulphide and CO2
Just as a person moves from Delhi to Shimla to escape the heat for the duration of hot summer, thousands of migratory birds from Siberia and other extremely cold northern regions move to:
1. Western Ghat
2. Meghalaya
3. Corbett National Park
4. Keoladeo National Park
Given below is a simplified model of phosphorus cycling in a terrestrial ecosystem with four blanks (A-D). Identify the blanks.
A | B | C | D | |
1. | Rock minerals | Detritus | Litter fall | Producers |
2. | Litter | Producers | Rock minerals | Detritus |
3. | Detritus | Rock minerals | Producers | Litter fall |
4 | Producers | Litter fall | Rock minerals | Detritus |
The extent of the global diversity of invertebrates is represented in the image below. Choose the correct combination of groups (A-D) respectively:
A | B | C | D | |
1. | Insects | Crustaceans | Other animal groups | Molluscs |
2. | Crustaceans | Insects | Molluscs | Other animal groups |
3. | Molluscs | Other animal groups | Crustaceans | Insects |
4 | Insects | Molluscs | Crustaceans | Other animal groups |
A scrubber in the exhaust of a chemical industrial plant removes:
1. Gases like sulphur dioxide
2. Particulate matter of the size 5 micrometer or above
3. Gases like ozone and methane
4. Particulate matter of the size 2.5 micrometer or less
If 20 J of energy is trapped at the producer level, then how much energy will be available to peacocks as food in the following chain?
Plant → mice → snake → peacock
1. | 0.02 J | 2. | 0.002 J |
3. | 0.2 J | 4. | 0.0002 J |
What is the maximum number of orbitals that can be identified with the following quantum numbers?
n = 3, l = 1, m = 0
1. | 1 | 2. | 2 |
3. | 3 | 4. | 4 |
Calculate the energy in corresponding to light of wavelength 45 nm:
(Planck's constant h = 6.63 × 10–34 Js: speed of light c = 3 × 108 ms–1)
1. 6.67 x 1015 J
2. 6.67 x 1011 J
3. 4.42 x 10-15 J
4. 4.42 x 10-18 J
Equal masses of H2, O2 and CH4 have been taken in a container of volume V at temperature 27 ºC in identical conditions. The ratio of the volumes of gases H2:O2 : CH4 would be:
1. 8:16:1
2. 16:8:1
3. 16:1:2
4. 8:1:2
If a is the length of the side of a cube, the distance between the body-centered atom and one corner atom in the cube will be:
1.
2.
3.
4.
Which property of colloids is not dependent on the charge on colloidal particles?
1. Coagulation
2. Electrophoresis
3. Electro-osmosis
4. Tyndall effect
Which of the following salts will give the highest pH in water?
1. KCl
2. NaCl
3. Na2CO3
4. CuSO4
The largest freezing point depression among the following O.10 m solutions is shown by:
1. | \(\mathrm{KCl}\) | 2. | \(\mathrm{C_6H_{12}O_6}\) |
3. | \(\mathrm{Al}_2(\mathrm{SO_4})_3\) | 4. | \(\mathrm{K_2SO_4}\) |
When 22.4 litres of H2(g) is mixed with 11.2 litres of Cl2(g), both at STP, the moles of HCl(g) formed is equal to:
1. 1 mol of HCl(g)
2. 2 mol of HCl(g)
3. 0.5 mol of HCl(g)
4. 1.5 mol of HCl(g)
When 0.1 mol MnO42- is oxidized the quantity of electricity required to completely oxidise MnO42-- to MnO4- is:
1. 96500 C
2. 2 x 96500 C
3. 9650 C
4. 96.50 C
The weight of silver (at.wt. = 108) displaced by a quantity of electricity which displaces 5600 mL of O2 at STP will be:
1. 5.4 g
2. 10.8 g
3. 54.0 g
4. 108.0 g
Which of the following statements is correct for the spontaneous adsorption of a gas?
1. | ∆ S is negative and therefore, ∆ H should be highly positive |
2. | ∆ S is negative and therefore, ∆ H should be highly negative |
3. | ∆ S is positive and therefore, ∆ H should be negative |
4. | -∆ S is positive and therefore, ∆ H should also be highly positive |
For the reversible reaction:
N2(g) + 3H2(g) \(\rightleftharpoons\) 2NH3(g) + heat
The equilibrium shifts in a forward direction:
1. by increasing the concentration of
2. by decreasing the pressure.
3. by decreasing the concentration of
4. by increasing pressure and decreasing temperature.
Given the reaction:
X2O4(l) → 2XO2(g)
ΔU = 2.1 kcal, ΔS = 20 cal K–1 at 300 K
The value of ΔG is:
1. 2.7 kcal
2. -2.7 kcal
3. 9.3 kcal
4. -9.3 kcal
For a given exothermic reaction, Kp and Kp’ are the equilibrium constants at temperatures T1 and T2 respectively. Assuming that the heat of reaction is constant in temperatures range between T1 and T2, it is a readily observation that:
1.
2.
3.
4.
The correct order of ionic radii is:
1.
2.
3.
4.
1.0 g of magnesium is burnt with 0.56 g O2 in a closed vessel. Which reactant is left in excess and by how much? (At. wt. Mg = 24; O = 16)
1. | Mg, 0.16 g | 2. | , 0.16 g |
3. | Mg, 0.44 g | 4. | , 0.28 g |
The pair of compounds that can exist together is:
1. FeCl3, SnCl2
2. HgCl, SnCl2
3. FeCl2, SnCl2
4. FeCl3, Kl
Be2+ is isoelectronic with which of the following ions?
1.
2.
3.
4.
A molecule among the following that has the maximum dipole moment is:
1. | \(\mathrm{CO_2}\) | 2. | \(\mathrm{CH_4}\) |
3. | \(\mathrm{NH_3}\) | 4. | \(\mathrm{NF_3}\) |
Which one of the following species has a plane triangular shape?
1. | - | 2. | |
3. | - | 4. |
The acidity of diprotic acids in aqueous solution increases in the order:
1. H2S < H2Se < H2Te
2. H2Se < H2S < H2Te
3. H2Te < H2S < H2Se
4. H2Se < H2Te < H2S
(a) H2O2 + O3 → H2O + 2O2
(b) H2O2 + Ag2O → 2Ag + H2O + O2
The role of hydrogen peroxide in the above reactions is respectively:
1. | oxidizing in (a) and reducing in (b) |
2. | reducing in (a) and oxidizing in (b) |
3. | reducing in (a) and (b) |
4. | oxidizing in (a) and (b) |
Artificial sweetener which is stable under cold conditions only is:
1. Saccharine
2. Sucralose
3. Aspartame
4. Alitame
In acidic medium, H2O2 changes Cr2O7–2 to CrO5 which has two (–O – O–) bonds.
The oxidation state of Cr in CrO5 is:
1. +5
2. +3
3. +6
4. -10
The reaction of aqueous KMnO4 with H2O2 in acidic condition gives:
1.
2.
3.
4.
Among the following complexes the one which shows zero crystal field stabilization energy (CFSE) is:
1.
2.
3.
4.
An ion that has magnetic moment 2.83 BM is:
(Atomic Number: Ti=22, Cr=24, Mn=25, Ni=28)
1.
2.
3.
4.
An anticancer agent among the following is:
1.
2. c
3. c
4.
The reason for the lanthanoid contraction is:
1. negligible screening effect of 'f' orbitals.
2. increasing nuclear charge.
3. decreasing nuclear charge.
4. decreasing screening effect.
The product (A) in the below-mentioned
reaction is:
1. | 2. | ||
3. | 4. |
The most stable diazonium salt among the following is:
1. \(CH_{3}N_{2}^{+}X^{-}\)
2. \(C_{6}H_{5}N_{2}^{+}X^{-}\)
3. \(CH_{3}CH_{2}N_{2}^{+}X^{-}\)
4. \(C_{6}H_{5}CH_{2}N_{2}^{+}X^{-}\)
D(+) glucose yields an oxime with hydroxyl amine. The structure of the oxime would be:
1. | 2. | ||
3. | 4. |
Which of the following hormones is produced under the condition of stress which stimulates glycogenolysis in the liver of human being?
1. Thyroxin
2. Insulin
3. Adrenaline
4. Estradiol
The example of a thermosetting polymer among the following options is:
1. | |
2. | |
3. | |
4. |
Which of the following organic compounds polymerizes to form the polyester Dacron?
1. Propylene and para
2. Benzoic acid and ethanol
3. Terephthalic acid and ethylene glycol
4. Benzoic acid and para
Which one of the following is not a common component of Photochemical Smog?
1. Ozone
2. Acrolein
3. Peroxyacetyl nitrate
4. Chlorofluorocarbons
In Kjeldahl’s method for estimation of nitrogen present in the soil sample, ammonia evolved from 0.75g of sample neutralized 10ml. of 1M H2SO4. The percentage of nitrogen in the soil is:
1. | 37.33 | 2. | 45.85 |
3. | 25.75 | 4. | 43.13 |
The product(s) that are formed when the given compound is treated with Br2 in the presence of FeBr3 are:
1. | 2. | and | |
3. | and |
4. | and |
When hydrolyzed with aqueous KOH, compounds that undergoes racemization are:
(i) | (ii) | CH3CH2CH2Cl | |
(iii) | (iv) |
1. | (i) and (ii) | 2. | (ii) and (iv) |
3. | (iv) only | 4. | (i) and (iv) |
Anisole is produced by which of the following set of reactants:
1. CH3CHO ; RMgX
2. C6H5OH ; NaOH ; CH3l
3. C6H5OH ; neutral FeCl3
4. C6H5 - CH3 ; CH3COCl ; AlCl3
The compound among the following that will not be soluble in
sodium hydrogen carbonate is:
1. | 2, 4, 6-Trinitrophenol | 2. | Benzoic acid |
3. | o-Nitrophenol | 4. | Benezenesulphonic acid |
1. | 2. | ||
3. | 4. |
Product Z in the above-mentioned reaction is:
1.
2.
3.
4.
Which of the following organic compounds has same hybridization as its combustion product –(CO2)?
1. Ethane
2. Ethyne
3. Ethene
4. Ethanol
If force (\(F\)), velocity (\(\mathrm{v}\)), and time (\(T\)) are taken as fundamental units, the dimensions of mass will be:
1. \( {\left[\mathrm{FvT}^{-1}\right]} \)
2. \({\left[\mathrm{FvT}^{-2}\right]} \)
3. \( {\left[\mathrm{Fv}^{-1} \mathrm{~T}^{-1}\right]} \)
4. \( {\left[\mathrm{Fv}^{-1} \mathrm{~T}\right]}\)
A projectile is fired from the surface of the earth with a velocity of \(5\) ms–1 and at an angle \(\theta\) with the horizontal. Another projectile fired from another planet with a velocity of \(3\) ms–1 at the same angle follows a trajectory that is identical to the trajectory of the projectile fired from the Earth. The value of the acceleration due to gravity on the other planet is: (given \(g=9.8\) ms–2)
1. \(3.5\) m/s2
2. \(5.9\) m/s2
3. \(16.3\) m/s2
4. \(110.8\) m/s2
A particle is moving such that its position coordinates (x, y) are (\(2\) m, \(3\) m) at time \(t=0,\) (\(6\) m,\(7\) m) at time \(t=2\) s, and (\(13\) m, \(14\) m) at time \(t=\) \(5\) s. The average velocity vector \(\vec{v}_{avg}\) from \(t=\) 0 to \(t=\) \(5\) s is:
1. \({1 \over 5} (13 \hat{i} + 14 \hat{j})\)
2. \({7 \over 3} (\hat{i} + \hat{j})\)
3. \(2 (\hat{i} + \hat{j})\)
4. \({11 \over 5} (\hat{i} + \hat{j})\)
A system consists of three masses \(m_1\), \(m_2\), and \(m_3\) connected by a string passing over a pulley \(\mathrm{P}\). The mass \(m_1\) hangs freely, and \(m_2\) and \(m_3\) are on a rough horizontal table (the coefficient of friction = \(\mu\)). The pulley is frictionless and of negligible mass. The downward acceleration of mass \(m_1\) is: (Assume \(m_1=m_2=m_3=m\) and \(g\) is the acceleration due to gravity.)
1. \(\frac{g(1-g \mu)}{9}\)
2. \(\frac{2 g \mu}{3}\)
3. \( \frac{g(1-2 \mu)}{3}\)
4. \(\frac{g(1-2 \mu)}{2}\)
The force \(\mathrm{F}\) acting on a particle of mass \(\mathrm{m}\) is indicated by the force-time graph shown below. The change in momentum of the particle over the time interval from \(0\) to \(8\) s is:
1. | \(24\) N-s | 2. | \(20\) N-s |
3. | \(12\) N-s | 4. | \(6\) N-s |
A balloon with mass \(m\) is descending down with an acceleration \(a\) (where \(a<g\)). How much mass should be removed from it so that it starts moving up with an acceleration \(a\)?
1. | \( \frac{2 m a}{g+a} \) | 2. | \( \frac{2 m a}{g-a} \) |
3. | \( \frac{m a}{g+a} \) | 4. | \( \frac{m a}{g-a}\) |
A body of mass (\(4m\)) is lying in the x-y plane at rest. It suddenly explodes into three pieces. Two pieces, each of mass (\(m\)) move perpendicular to each other with equal speeds (\(u\)). The total kinetic energy generated due to explosion is:
1. | \(mu^2\) | 2. | \(1.5~mu^2\) |
3. | \(2~mu^2\) | 4. | \(3~mu^2\) |
The oscillation of a body on a smooth horizontal surface is represented by the equation, \(X=A \text{cos}(\omega t)\),
where \(X=\) displacement at time \(t,\) \(\omega=\) frequency of oscillation.
Which one of the following graphs correctly shows the variation of acceleration, \(a\) with time, \(t?\)
(\(T=\) time period) \(a~~O~~T~~t~~\)
1. | 2. | ||
3. | 4. |
A solid cylinder of mass \(50\) kg and radius \(0.5\) m is free to rotate about the horizontal axis. A massless string is wound around the cylinder with one end attached to it and the other end hanging freely.
The tension in the string required to produce an angular acceleration of \(2\) revolutions/s2 will be:
1. \(25\) N
2. \(50\) N
3. \(78.5\) N
4. \(157\) N
The ratio of the acceleration for a solid sphere (mass \(m\) and radius \(R\)) rolling down an incline of angle \(\theta\) without slipping and slipping down the incline without rolling is:
1. \(5:7\)
2. \(2:3\)
3. \(2:5\)
4. \(7:5\)
A black hole is an object whose gravitational field is so strong that even light cannot escape from it. To what approximate radius would Earth (mass \(= 5.98\times 10^{24}~\text{kg}\)) have to be compressed to be a black hole?
1. \(10^{-9}~\text{m}\)
2. \(10^{-6}~\text{m}\)
3. \(10^{-2}~\text{m}\)
4. \(100~\text{m}\)
Dependence of intensity of gravitational field \((\mathrm{E})\) of the earth with distance \((\mathrm{r})\) from the centre of the earth is correctly represented by: (where \(\mathrm{R}\) is the radius of the earth)
1. | 2. | ||
3. | 4. |
Copper of fixed volume \(V\) is drawn into a wire of length \(l.\) When this wire is subjected to a constant force \(F,\) the extension produced in the wire is \(\Delta l.\) Which of the following graphs is a straight line?
1. \(\Delta l ~\text{vs}~\frac{1}{l}\)
2. \(\Delta l ~\text{vs}~l^2\)
3. \(\Delta l ~\text{vs}~\frac{1}{l^2}\)
4. \(\Delta l ~\text{vs}~l\)
A certain number of spherical drops of a liquid of radius \({r}\) coalesce to form a single drop of radius \({R}\) and volume \({V}\). If \({T}\) is the surface tension of the liquid, then:
1. | energy \(= 4{VT}\left( \frac{1}{{r}} - \frac{1}{{R}}\right)\) is released. |
2. | energy \(={ 3{VT}\left( \frac{1}{{r}} + \frac{1}{{R}}\right)}\) is released. |
3. | energy \(={ 3{VT}\left( \frac{1}{{r}} - \frac{1}{{R}}\right)}\) is released. |
4. | energy is neither released nor absorbed. |
Steam at \(100~^{\circ}\mathrm{C}\) is passed into \(20~\text{g}\) of water at \(10~^{\circ}\mathrm{C}\). When water acquires a temperature of \(80~^{\circ}\mathrm{C}\), the mass of water present will be:
[Take specific heat of water \(= 1~\text{cal g}^{-1}~^\circ\mathrm{C}^{-1}\) and latent heat of steam \(= 540~\text{cal g}^{-1}\)]
1. \(24~\text{g}\)
2. \(31.5~\text{g}\)
3. \(42.5~\text{g}\)
4. \(22.5~\text{g}\)
A certain quantity of water cools from \(70~^{\circ}\text{C}\) to \(60~^{\circ}\text{C}\) in the first \(5\) minutes and to \(54~^{\circ}\text{C}\) in the next \(5\) minutes. The temperature of the surroundings is:
1. \(45~^{\circ}\text{C}\)
2. \(20~^{\circ}\text{C}\)
3. \(42~^{\circ}\text{C}\)
4. \(10~^{\circ}\text{C}\)
A monoatomic gas at a pressure \(P\), having a volume \(V\), expands isothermally to a volume \(2V\) and then adiabatically to a volume \(16V\). The final pressure of the gas is: \(\left(\text{Take:}~ \gamma = \frac{5}{3} \right)\)
A thermodynamic system undergoes a cyclic process \(ABCDA\) as shown in Fig. The work done by the system in the cycle is:
1. \( P_0 V_0 \)
2. \( 2 P_0 V_0 \)
3. \( \frac{P_0 V_0}{2} \)
4. zero
The mean free path of molecules of a gas (radius \(r\)) is inversely proportional to:
1. \(r^3\)
2. \(r^2\)
3. \(r\)
4. \(\sqrt{r}\)
If \(n_1\), \(n_2\), and \(n_3\) are the fundamental frequencies of three segments into which a string is divided, then the original fundamental frequency \(n\) of the string is given by:
1. \( \frac{1}{n}=\frac{1}{n_1}+\frac{1}{n_2}+\frac{1}{n_3}\)
2. \( \frac{1}{\sqrt{n}}=\frac{1}{\sqrt{n_1}}+\frac{1}{\sqrt{n_2}}+\frac{1}{\sqrt{n_3}}\)
3. \( \sqrt{n}=\sqrt{n_1}+\sqrt{n_2}+\sqrt{n_3}\)
4. \( n=n_1+n_2+n_3\)
The number of possible natural oscillations of the air column in a pipe closed at one end of length \(85\) cm whose frequencies lie below \(1250\) Hz are:(velocity of sound= \(340~\text{m/s}\)
1. \(4\)
2. \(5\)
3. \(7\)
4. \(6\)
A speeding motorcyclist sees a traffic jam ahead of him. He slows down to 36 km/hour. He finds that traffic has eased and a car moving ahead of him at 18 km/hour is honking at a frequency of 1392 Hz. If the speed of sound is 343 m/s, the frequency of the honk as heard by him will be:
1. 1332 Hz
2. 1372 Hz
3. 1412 Hz
4. 1454 Hz
Two thin dielectric slabs of dielectric constants \(K_1\) and \(K_2\) \((K_1<K_2)\) are inserted between plates of a parallel plate capacitor, as shown in the figure. The variation of electric field \('E'\) between the plates with distance \('d'\) as measured from the plate \(P\) is correctly shown by:
1. | 2. | ||
3. | 4. |
A conducting sphere of the radius \(R\) is given a charge \(Q.\) The electric potential and the electric field at the centre of the sphere respectively are:
1. | zero and \(\frac{Q}{4 \pi \varepsilon_0 {R}^2}\) | 2. | \(\frac{Q}{4 \pi \varepsilon_0 R}\) and zero |
3. | \(\frac{Q}{4 \pi \varepsilon_0 R}\) and \(\frac{Q}{4 \pi \varepsilon_0{R}^2}\) | 4. | both are zero |
In a region, the potential is represented by \(V=(x,y,z)=6x-8xy-8y+6yz,\) where \(V\) is in volts and \(x,y,z\) are in meters. The electric force experienced by a charge of \(2\) coulomb situated at a point \((1,1,1)\) is:
1. \(6\sqrt{5}~\text{N}\)
2. \(30~\text{N}\)
3. \(24~\text{N}\)
4. \(4\sqrt{35}~\text{N}\)
Two cities are \(150~\text{km}\) apart. Electric power is sent from one city to another city through copper wires. The fall of potential per km is \(8\) volts and the average resistance per km is \(0.5~\text{ohm}\). The power loss in the wire is:
1. \(19.2~\text{W}\)
2. \(19.2~\text{kW}\)
3. \(19.2~\text{J}\)
4. \(12.2~\text{kW}\)
The figure given below shows a circuit when resistances in the two arms of the meter bridge are \(5~\Omega\) and \(R\), respectively. When the resistance \(R\) is shunted with equal resistance, the new balance point is at \(1.6l_1\). The resistance \(R\) is:
1. \(10~\Omega\)
2. \(15~\Omega\)
3. \(20~\Omega\)
4. \(25~\Omega\)
A potentiometer circuit has been set up for finding the internal resistance of a given cell. The main battery, used across the potentiometer wire, has an emf of \(2.0~\text{V}\) and negligible internal resistance. The potentiometer wire itself is \(4~\text{m}\) long. When the resistance, \(R\), connected across the given cell, has values of (i) infinity (ii) \(9.5\), the 'balancing lengths, on the potentiometer wire, are found to be \(3~\text{m}\) and \(2.85~\text{m}\), respectively. The value of the internal resistance of the cell is (in ohm):
1. \(0.25\)
2. \(0.95\)
3. \(0.5\)
4. \(0.75\)
The following figures show the arrangement of bar magnets in different configurations. Each magnet has a magnetic dipole. Which configuration has the highest net magnetic dipole moment?
1. | 2. | ||
3. | 4. |
In an ammeter, \(0.2 \%\) of the main current passes through the galvanometer. If the resistance of the galvanometer is \(G,\) the resistance of the ammeter will be:
1. | \({1 \over 499}G\) | 2. | \({499 \over 500}G\) |
3. | \({1 \over 500}G\) | 4. | \({500 \over 499}G\) |
Two identical long conducting wires \(\mathrm{AOB}\) and \(\mathrm{COD}\) are placed at a right angle to each other, with one above the other such that '\(O\)' is the common point for the two. The wires carry \(I_1\) and \(I_2\) currents, respectively.
Point '\(P\)' is lying at a distance '\(d\)' from '\(O\)' along a direction perpendicular to the plane containing the wires. What will be the magnetic field at the point \(P\)?
1. \(\frac{\mu_0}{2\pi d}\left(\frac{I_1}{I_2}\right )\)
2. \(\frac{\mu_0}{2\pi d}\left[I_1+I_2\right ]\)
3. \(\frac{\mu_0}{2\pi d}\left[I^2_1+I^2_2\right ]\)
4. \(\frac{\mu_0}{2\pi d}\sqrt{\left[I^2_1+I^2_2\right ]}\)
A thin semicircular conducting the ring \((PQR)\) of radius \(r\) is falling with its plane vertical in a horizontal magnetic field \(B,\) as shown in the figure. The potential difference developed across the ring when it moves with speed \(v\) is:
1. | zero |
2. | \(Bv\pi r^{2}/2\) and \(P\) is at a higher potential |
3. | \(\pi rvB\) and \(R\) is at a higher potential |
4. | \(2BvR\) and \(R\) is at higher potential |
Light with an energy flux of \(25\times10^4\) Wm–2 falls on a perfectly reflecting surface at normal incidence. If the surface area is \(15\) cm2, the average force exerted on the surface is:
1. \(1.25\times 10^{-6}\) N
2. \(2.50\times 10^{-6}\) N
3. \(1.20\times 10^{-6}\) N
4. \(3.0\times 10^{-6}\) N
A beam of light of \(\lambda = 600~\text{nm}\) from a distant source falls on a single slit \(1~\text{mm}\) wide and the resulting diffraction pattern is observed on a screen \(2~\text{m}\) away. The distance between the first dark fringes on either side of the central bright fringe is:
1. \(1.2~\text{cm}\)
2. \(1.2~\text{mm}\)
3. \(2.4~\text{cm}\)
4. \(2.4~\text{mm}\)
In Young's double-slit experiment, the intensity of light at a point on the screen where the path difference is \(\lambda\) is \(K\), (\(\lambda\) being the wavelength of light used). The intensity at a point where the path difference is \(\frac{\lambda}{4}\) will be:
1. \(K\)
2. \(\frac{K}{4}\)
3. \(\frac{K}{2}\)
4. zero
If the focal length of the objective lens is increased then the magnifying power of:
1. | microscope will increase but that of the telescope decrease. |
2. | microscope and telescope both will increase. |
3. | microscope and telescope both will decrease. |
4. | microscope will decrease but that of the telescope will increase. |
The angle of a prism is \(A\) One of its refracting surfaces is silvered. Light rays falling at an angle of incidence \(2{A}\) on the first surface return back through the same path after suffering reflection at the silvered surface. The refractive index \(\mu,\) of the prism, is:
1. \(2\text{sin}A\)
2. \(2\text{cos}A\)
3. \(\frac{1}{2}\text{cos}A\)
4. \(\text{tan}A\)
When the energy of the incident radiation is increased by \(20\%\), the kinetic energy of the photoelectrons emitted from a metal surface increases from \(0.5~\text{eV}\) to \(0.8~\text{eV}\). The work function of the metal is:
1. \(0.65~\text{eV}\)
2. \(1.0~\text{eV}\)
3. \(1.3~\text{eV}\)
4. \(1.5~\text{eV}\)
If the kinetic energy of the particle is increased to \(16\) times its previous value, the percentage change in the de-Broglie wavelength of the particle is:
1. \(25\)
2. \(75\)
3. \(60\)
4. \(50\)
The hydrogen gas with its atoms in the ground state is excited by monochromatic radiation of \(\lambda = 975~\mathring{\text{A}}\). The number of spectral lines in the resulting spectrum emitted will be:
1. \(3\)
2. \(2\)
3. \(6\)
4. \(10\)
The Binding energy per nucleon of \(^{7}_{3}\mathrm{Li}\) and \(^{4}_{2}\mathrm{He}\) nucleon are \(5.60~\text{MeV}\) and \(7.06~\text{MeV}\), respectively. In the nuclear reaction \(^{7}_{3}\mathrm{Li} + ^{1}_{1}\mathrm{H} \rightarrow ^{4}_{2}\mathrm{He} + ^{4}_{2}\mathrm{He} +Q\), the value of energy \(Q\) released is:
1. \(19.6~\text{MeV}\)
2. \(-2.4~\text{MeV}\)
3. \(8.4~\text{MeV}\)
4. \(17.3~\text{MeV}\)
A radioisotope 'X' with a half-life 1.4 × 109 years decays to 'Y' which is stable. A sample of the rock from a cave was found to contain 'X' and 'Y' in the ratio 1:7. The age of the rock is:
1. 1.96 x 109 years
2. 3.92 x 109 years
3. 4.20 x 109 years
4. 8.40 x 109 years
The given graph represents the \(\mathrm{V\text{-} I}\) characteristic for a semiconductor device.
Which of the following statement is correct?
1. | It is a \(\mathrm{V\text{-} I}\) characteristic for the solar cell where point \(\mathrm{A}\) represents open-circuit voltage and point \(\mathrm{B}\) short circuit current. |
2. | It is for a solar cell and points \(\mathrm{A}\) and \(\mathrm{B}\) represent open-circuit voltage and current, respectively. |
3. | It is for a photodiode and points \(\mathrm{A}\) and \(\mathrm{B}\) represent open-circuit voltage and current respectively. |
4. | It is for a LED and points \(\mathrm{A}\) and \(\mathrm{B}\) represent open circuit voltage and short circuit current, respectively. |
The barrier potential of a \(\mathrm{p\text{-}n}\) junction depends on:
(a) | type of semiconductor material |
(b) | amount of doping |
(c) | temperature |
Which one of the following is correct?
1. (a) and (b) only
2. (b) only
3. (b) and (c) only
4. (a), (b) and (c)