In a type of apomixis known as adventive polyembryony, embryo develops directly from the:
1. | synergids or antipodals in an embryo sac |
2. | nucellus or integuments |
3. | zygote |
4. | accessory embryo sac in the ovule |
Select the correct statement:
1. Franklin Stahl coined the term "linkage"
2. Punnett square was developed by a British scientist
3. Spliceosomes take part in translation
4. Transduction was discovered by S. Altman
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
Mycorrhizal plants have the following benefits, except:
1. | Phosphorus from the soil by means of fungi |
2. | Resistance to root borne pathogens |
3. | Tolerance to salinity, drought, and extremely low temperature |
4. | Overall increase in plant growth and development |
Which of the following statements is true?
1. | A British scientist created the conditions proposed by Oparin and Haldane in a closed flask with temperature of 800 degrees Celsius in electric discharge along with gases methane, hydrogen, ammonia and water vapour and observed the formation of amino acid. |
2. | Some similar experimental setups were also prepared by other scientists and the formation of sugar, nitrogenous bases, pigments and fats were recorded. |
3. | The processes of chemical evolution occurring elsewhere in space was concluded by the analysis of content of gaseous cloud. |
4. | The first self-replicating metabolic capsule of life arose 3 billion years back. |
The embryo does not have:
1. Embryonal axis
2. Radicle
3. One or two cotyledons
4. Seed coat
Which of the following shows the coordinated movement of cilia?
1. Trypanosoma
2. Entamoeba
3. Paramoecium
4. Plasmodium
Which of the following is not a true statement?
1. | In translation, the transfer of genetic information from a polymer of nucleotides to a polymer of amino acids takes place. |
2. | Complementarity exists between nucleotide sequences and amino acid sequences. |
3. | The basis for transcription and replication is complementarity. |
4. | A change in nucleic acid is responsible for a change in amino acid. |
Identify the incorrect statement:
1. | Tall plant produces gametes by meiosis and the dwarf plant by mitosis. |
2. | Only one allele is transmitted to a gamete. |
3. | The segregation of alleles is a random process. |
4. | Gametes will always be pure for the trait. |
Match the following and choose the correct option:
Column I | Column II | ||
(a) | Aleurone layer | (i) | without fertilization |
(b) | Parthenocarpic fruit | (ii) | Nutrition fruit |
(c) | Ovule | (iii) | Double fertilization |
(d) | Endosperm | (iv) | Seed |
Options:
(a) | (b) | (c) | (d) | |
1. | (i) | (ii) | (iii) | (iv) |
2. | (ii) | (i) | (iv) | (iii) |
3. | (iv) | (ii) | (i) | (iii) |
4. | (ii) | (iv) | (i) | (iii) |
In RNAi, the genes are silenced using :
1. dsRNA
2. ssDNA
3. ssRNA
4. dsDNA
Removal of apical dominance by decapitation is utilised for:
1. Suppressing the activity of intercalary meristem
2. Early senescence
3. Hedge making
4. Preparing weed-free lawns
Select the option with correct words for the blanks below:
A. | Histones are organised to form a unit of eight molecules called _______. |
B. | _______ constitute the repeating unit of a structure in nucleus called chromatin. |
C. | The chromatin that is more densely packed and stains dark is called ________. |
A | B | C | |
1. | Nucleosome | Chromosome | Euchromatin |
2. | Histone octamer | Nucleosome | Heterochromatin |
3. | Histone octamer | Nucleoid | Euchromatin |
4. | Nucleosome | Nucleoid | Heterochromatin |
1. | Only I is correct | 2. | Only I and III are correct |
3. | Only II is correct | 4. | Only II and III are correct |
I: | Nomenclature is critical as it allows a particular organism to be known by the same name all over the world. |
II: | Identification is critical as nomenclature or naming is only possible when the organism is described correctly and we know to what organism the name is attached to. |
Assertion (A): | Whole plants can be regenerated from any part of a plant taken out and grown in a test tube, under sterile conditions in special nutrient media |
Reason (R): | Every living plant cell is totipotent |
1. | Both (A) and (R) are True and the (R) is the correct explanation of the (A) |
2. | Both (A) and (R) are True but the (R) is not the correct explanation of the (A) |
3. | (A) is True but (R) is False |
4. | Both (A) and (R) are False |
The Earth Summit held in Rio de Janeiro in 1992 was called:
1. | for immediate steps to discontinue use of CFCs that were damaging the ozone layer |
2. | to reduce CO2 emissions and global warming |
3. | for conservation of biodiversity and sustainable utilization of its benefits |
4. | to assess threat posed to native species by invasive weed species |
Glycolysis is found in the cytoplasm of virtually all types of aerobic/anaerobic cells. In this process, glucose is converted into :
1. PEP
2. acetyl CoA
3. pyruvic acid
4. citric acid
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.
Select the wrong statement:
1. | Protista have photosynthetic and heterotrophic modes of nutrition |
2. | Some fungi are edible |
3. | Nuclear membrane is present in Monera |
4. | Cell wall is absent in Animalia |
Select the wrong statement:
1. | Mycoplasma is a wall-less microorganism |
2. | Bacterial cell wall is made up of peptidoglycan |
3. | Pili and fimbriae are mainly involved in motility of bacterial cells |
4. | Cyanobacteria lack flagellated cells |
Character | Pinus | Cycas | |
1. | Root symbiotic association | Mycorrhiza | Cynobacteria |
2. | Stem | Branched | Unbranched |
3. | Reproductive parts | Dioecious | Monoecious |
4. | Scale leaves | Fall off as branches mature | Persistent, protective |
Consider the following statements (a-d) each with one or two blanks.
1. | All solids that settle during primary treatment of sewage forms (i) and supernatant forms the (ii) . |
2. | Secondary treatment of sewage is also known as (iii) treatment. |
3. | A small part of the activated sludge is pumped back into the aeration tank to serve as the (iv) . |
4. | The sewage water is treated till (v) is reduced. |
(i) | (ii) | (iii) | (iv) | (v) | |
1. | Primary sludge | Flocs | DO | ||
2. | Effluent | Biological | Inoculum | BOD | |
3. | Primary sludge | Flocs | Inoculm | DO | |
4. | Effluent | Primary sludge | Flocs | BOD |
Select the incorrect statement with respect to C3 cycle:
1. | For one CO2 fixation, three ATPs are required |
2. | Regeneration of the CO2 acceptor molecule RuBP is not crucial for the continuation of the cycle |
3. | The first stable product is PGA |
4. | Carboxylation is the most crucial step |
Some stages of development of a dicot embryo are given below:-
a. | Proembryo |
b. | Globular stage |
c. | Heart shape |
d. | Mature embryo |
The correct sequence of the given stages is:
1. | a, b, c, d |
2. | c, d, b, a |
3. | a, c, d, b |
4. | b, d, c, a |
DNA and RNA differ by:-
1. Nitrogen bases and sugars
2. Nitrogen bases and phosphate groups
3. Number of C-atoms in sugars
4. Sugar and phosphate groups
1. | Isocitrate – Citrate – Succinyl CoA – α ketoglutarate |
2. | Citrate – Isocitrate – Succinyl CoA – α ketoglutarate |
3. | Citrate – Isocitrate – α ketoglutarate – Succinyl CoA |
4. | Isocitrate – Citrate – α ketoglutarate – Succinyl CoA |
In Antirrhinum (Snapdragon), a red flower was crossed with a white flower and in generation, pink flowers were obtained. When pink flowers were selfed, the generation showed white, red and pink flowers. Choose the incorrect statement from the following:
1. | Law of Segregation does not apply in this experiment |
2. | This experiment does not follow the Principle of Dominance |
3. | Pink colour in F1 is due to incomplete dominance |
4. | Ratio of F2 is 1/4(red):2/4(pink):1/4(white) |
The sequence that controls the copy number of the linked DNA in the vector is termed :
1. Ori site
2. Palindromic sequence
3. Recognition site
4. Selectable marker
Find the incorrect statement about cell wall:
1. determines shape of the cell
2. prevent cell from bursting and collapsing
3. selective permeable in nature
4. provides strong structural support
Identify the correct match:
1. | Coleorhiza | Dicot family |
2. | Non-albuminous seed | Thick and swollen cotyledon |
3. | Residual nucellus | maize |
4. | Residual endosperm | Pea |
Choose correct option with respect to given below inflorescence:
1. Main axis terminates in flower
2. Acropetal arrangement of flowers
3. Unlimited growth of main axis
4. More than one option is correct
1. | Liliaceae | 2. | Gramineae |
3. | Leguminosae | 4. | Rosaceae |
Which plant hormone is used to prepare weed free lawns?
1. Kinetin
2. 2,4-D
3. Zeatin
4. Dormin
I: | both male and female flowers are present on the same plant |
II: | autogamy is prevented, but not geitonogamy |
1. | Only I is true | 2. | Only II is true |
3. | Both I and II are true | 4. | Both I and II are false |
The logistic population growth is expressed by the equation:
1.
2.
3.
4.
Which one is true for collenchyma?
1. | forms the hypodermis of dicot stem |
2. | present below the epidermis in layers or patches |
3. | thickened corners due to cellulose, hemicellulose, and pectin deposition |
4. | All of the above |
Examine the figures A, B, C, and D and identify the one in which all labelings are correct?
A. | B. | ||
C. | D. |
A | B | C | D | |
1. | Laminaria | Salvinta | Male thallus of Marchantia | Cayas |
2. | Polysiphonia | Equisetum | Female thallus of Marchantia | Ginkgo |
3. | Chara | Selaginella | Sphagnum | Ginkgo |
4. | Fucus | Fern | Funaria | Pinus |
Select the incorrect statement with respect to light reaction:
1. | The primary acceptor of PS-ll is pheophytin |
2. | The splitting of water is associated with PS-ll |
3. | In PS-l, the reaction centre Chlorophyll-a has an absorption peak at 680 nm |
4. | The LHC are made up of core and antenna molecules |
Glycerol would enter the respiratory pathway after being converted to-
1. PGAL
2. DPGA
3. PGA
4. Acetyl CoA
1. | The production of plants that exhibit large variations from the parent plants. |
2. | Quickly production of mature plants. |
3. | The regeneration of whole plants from plant cells that have been genetically modified. |
4. | Storage of genetic plant material to safeguard native plant species. |
Identify the incorrect pair:
1. Lectins - Concanavalin A
2. Drugs - Ricin
3. Alkaloids - Codeine
4. Toxin - Abrin
Which stages of cell division do the following figures A and B represent respectively ?
1. Metaphase-Telophase
2. Telophase - Metaphase
3. Late anaphase – Prophase
4. Prophase – Anaphase
Which of the following hormone is responsible for cell mediated immunity?
1. Thyroxine
2. adrenaline
3. Thymosins
4. parathyroid
Read the following statements carefully:
A. | Lipid component of the plasma membrane mainly consists of phosphoglycerides. |
B. | Polar molecules can pass through the lipid bilayer of the plasma membrane, therefore they do not require carrier proteins to facilitate their transport. |
C. | The secondary wall is capable of growth and it is formed on the outer side of the cell. |
D. | Quasi-fluid nature of lipids enables the lateral movement of proteins within the overall lipid bilayer of the plasma membrane. |
E. | Middle lamella glues the different neighboring cells together. |
How many statements are incorrect?
1. | Three | 2. | Five |
3. | Four | 4. | Two |
1. | Fascia | 2. | Perimysium |
3. | Endomysium | 4. | Epimysium |
In genetic engineering, the antibiotic resistance gene are used:
1. As selectable markers
2. To select healthy vectors
3. As sequences from where replication starts
4. to keep the cultures free of infection
Which one of the following is at high risk of extinction?
1. Mammals
2. Birds
3. Amphibians
4. Echinoderms
Which of the following is true for inspiration?
1. thoracic chamber volume increases
2. Diaphragm contracts
3. pulmonary volume increases
4. All of these
Which of the following is not a part of urine formation?
1.Glomerular Filtration
2.Reabsorption
3.Secretion
4.Counter current mechanism
Match the items given in Column I with those in Column II and select the correct option given below:
Column I | Column II |
a. Tricuspid valve | i. Between left atrium and left ventricle |
b. Bicuspid valve | ii. Between right ventricle and pulmonary artery |
c. Semilunar valve | iii. Between right atrium and right ventricle |
Options:
a | b | c | |
1. | iii | i | ii |
2. | i | iii | ii |
3. | i | ii | iii |
4. | ii | i | iii |
1. | impermeable to Na+ ions and relatively more permeable to K+ ions. |
2. | impermeable to Na+ ions and K+ ions. |
3. | freely permeable to Na+ ions and relatively more impermeable to K+ ions. |
4. | freely permeable to Na+ ions and K+ ions. |
Which of the following inhibits gastric secretion?
1. Gastrin
2. Secretin
3. Cholecystokinin
4. Gastric inhibitory peptide
The structure given below is of:
1. | A purine base | 2. | Adenosine |
3. | Adenylic acid | 4. | A pyrimidine base |
Match the organism in Column-I with its excretory structure in Column-II:
Column I | Column II |
(a) Cockroach | (p) Nephridia |
(b) Earthworm | (q) Proboscis gland |
(c) Balanoglossus | (r) Kidney |
(d) Clarias | (s) Malpighian tubules |
(a | (b) | (c) | (d) | |
1. | (s) | (p) | (q) | (r) |
2. | (s) | (p) | (r) | (q) |
3. | (q) | (p) | (r) | (s) |
4. | (s) | (q) | (r) | (p) |
Pvu I restriction site is present in pBR322 at:
1. rop
2. Tetracycline Resistance gene
3. Ampicillin Resistance gene
4. Ori
1. | Anti-histamines | 2. | Steroids |
3. | Adrenaline | 4. | Antibiotics |
Which of the following is not true about Homo sapiens?
1. | Arose in 75000- 10000 years ago |
2. | Cave art developed about 18000 years ago |
3. | Agriculture came around 10000 years ago |
4. | Modern man's skull resembles more with adult chimpanzee than baby chimpanzee |
A human female with turner's syndrome:
1. has 45 chromosomes with XO
2. has one additional X-chromosome
3. exhibits male characters
4. is able to produce children with normal husband
Sertoli cells are found in:
1. ovaries and secrete progesterone
2. adrenal cortex and secrete adrenaline
3. seminiferous tubules and provide nutrition to germ cells
4. pancreas and secrete cholecystokinin
The Adenosine deaminase deficiency results into:
1. Digestive disorder
2. Addison's disease
3. Dysfunction of Immune system
4. Parkinson's disease
A | B | C | D | |
1. | Z line | A band | H zone | I band |
2. | Z line | A band | I band | H zone |
3. | M line | A band | H zone | I band |
4. | M line | H zone | A band | I band |
Method | Mode of action | ||
A | The pill | a | Prevents sperms from reaching ovum |
B | Condom | b | Prevents implantation |
C | Vasectomy | c | Prevents ovulation |
D | Copper - T | d | Semen contains no sperms |
A | B | C | D | |
1. | c | a | d | b |
2. | d | a | b | c |
3. | c | d | a | b |
4. | b | c | a | d |
Skeletal muscles appear striated due to presence of two characteristic proteins in alternating dark and light bands. Which of the following is a correct match of the protein with its light refractive property and colour?
Protein | Colour | Property | |
1. | Myosin | Light | Anisotropic |
2. | Actin | Dark | Anisotropic |
3. | Myosin | Dark | Isotropic |
4. | Actin | Light | Isotropic |
Exotic species introduced in India are:
1. Lantana Camara, Water Hyacinth
2. Water Hyacinth, Prosopis cineraria
3. Nile Perch, Ficus religiosa
4. Ficus religiosa, Lantana Camara
Which of the following is a correct statement?
1. | Every chemical reaction of metabolism is a catalysed reaction. |
2. | There is no uncatalysed metabolic conversion in the living system. |
3. | The proteins with catalytic power are called as enzymes. |
4. | All of these |
Which one of the following pairs of animals comprises ‘jawless fishes’?
1. Guppies and hag fishes
2. Lampreys and eels
3. Mackerels and Rohu
4. Lampreys and hag fishes
Which of the following components provides sticky character to the bacterial cell?
1. Cell wall
2. Nuclear membrane
3. plasma membrane
4. Glycocalyx
Disease | Causative Organisms | Mode of Infection | |
1. | Typhoid | Salmonella typhi | With inspired air |
2. | Pneumonia | Streptococcus pneumoniae | Droplet infection |
3. | Elephantiasis | Wuchereria bancrofti | infected water and food |
4. | Malaria | Plasmodium vivax | Bite of male anopheles mosquito |
Which one of the following techniques made it possible to genetically engineer living organisms?
1. Recombinant DNA techniques
2. X-ray diffraction
3. Heavier isotope labeling
4. Hybridization
The eye of an octopus and the eye of a cat show different patterns of structure, yet they perform similar function. This is an example of:
1. | Homologous organs that have evolved due to convergent evolution |
2. | Homologous organs that have evolved due to divergent evolution |
3. | Analogous organs that have evolved due to convergent evolution |
4. | Analogous organs that have evolved due to divergent evolution |
Which one of the following statements is correct?
1. | Neurons regulate endocrine activity, but not vice versa. |
2. | Endocrine glands regulate neural activity, and nervous system regulates endocrine glands. |
3. | Neither hormones control neural activity nor do the neurons control endocrine activity. |
4. | Endocrine glands regulate neural activity, but not vice versa. |
A drop of each of the following is placed separately on four slides. Which of them will not coagulate?
1. Whole blood from pulmonary vein
2. Blood plasma
3. Blood serum
4. Sample from the thoracic duct of lymphatic system
Structure | Location | Function | |
1. | Cerebellum | Midbrain | Controls respiration and gastric secretions |
2. | Hypothalamus | Forebrain | Controls body temperature, urge for eating and drinking |
3. | Blind spot | Near the place where optic nerve leaves the eye | Rods and cones are present but inactive here |
4. | Eustachian tube | Anterior part of internal ear | Equalizes air pressure on either side of tympanic membrane |
Column I | Column II | ||
(a) | Glycosuria | (i) | Accumulation of uric acid in joints |
(b) | Gout | (ii) | Mass of crystallised salts within the kidney |
(c) | Renal calculi | (iii) | Inflammation in glomeruli |
(d) | Glomerulonephritis | (iv) | Presence of glucose in urine |
Codes:
(a) | (b) | (c) | (d) | |
1. | (ii) | (iii) | (i) | (iv) |
2. | (i) | (iii) | (ii) | (iv) |
3. | (iii) | (ii) | (iv) | (i) |
4. | (iv) | (i) | (ii) | (iii) |
Trachea divides into right and left primary bronchi at the level of:
1. Seventh cervical vertebra
2. Third thoracic vertebra
3. Fifth thoracic vertebra
4. Seventh thoracic vertebra
Select the incorrect statement with respect to male reproductive system:
1. | Seminiferous tubules in the testes are a site of sperm formation |
2. | Leydig cells scattered outside the Seminiferous tubules provide nourishment to sperms |
3. | For most mammals, sperm production occurs properly only when the testes are cooler than normal body temperature |
4. | Sperms, while passing through epididymis attain motility |
Assertion (A): | The alimentary canal in frog is short. |
Reason (R): | Frog is a herbivore. |
1. | Both (A) and (R) are True and (R) explains (A) |
2. | Both (A) and (R) are True and (R) does not explain (A) |
3. | (A) is True but (R) is False |
4. | (A) is False but (R) is True |
Which of the following events happen when air is expelled from the lungs?
1. Ribs and sternum return to the original position
2. volume of thorax decreases
3. Diaphragm relaxes and arches upwards
4. All of the above
Water retention in plasma is brought about mainly by:
1. Fibrinogens
2. Serum albumins
3. Alpha globulins
4. Gamma globulins
During the follicular phase of the menstrual cycle which of the following occur?
I: | The primary follicle grows and becomes fully mature Graafian follicle |
II: | The endometrium of the uterus regenerates through proliferation |
1. Only I
2. Only II
3. I and II
4. None
The protozoans that cause malaria in humans are :
1. | Radiolarians | 2. | Dinoflagellates |
3. | Chrysophytes | 4. | Sporozoans |
Mark the correct character of the following figure:
1. Tetrapedal and having bony plates on the back
2. Tetrapedal and having a collar on the neck
3. Bipedal and have huge fearsome dagger-like teeth
4. Bipedal and have three horns on head
The invertebrates have which of the following excretory structures?
1. Simple Tubular forms
2. Complex tubular organs
3. Kidneys
4. Interstitial lamina
The ……. receive signals from …….and transmit it via …….nerve root
1. Afferent neurons, sensory organs, dorsal
2. Afferent neurons, effector organs, ventral
3. Efferent neurons, sensory organs, ventral
4. Efferent neurons, effector organs, dorsal
Which of the following hormone is related to the pigmentation of skin?
1. MSH
2. ACTH
3. LH
4. FSH
Mark the feature which is not associated with white muscle fibres:
1. | Lighter in color |
2. | These muscles have a fast rate of contraction but for a short period |
3. | They depend mainly on glycolysis for energy production and soon get fatigued |
4. | Less sarcoplasmic reticulum compared to red muscle fibres |
The first type II restriction endonuclease discovered that could cut dsDNA at specific site was:
1. EcoRI
2. SmaI
3. Hind II
4. Hind III
What is true about Bt toxin?
1. | The concerned Bacillus has antitoxins. |
2. | The inactive protoxin gets converted into active form in the insect gut |
3. | BT protein exists as active toxin in the Bacillus. |
4. | The activated toxin enters the ovaries of the pest to sterilise it and thus prevent its multiplication |
The Leydig cells as found in the human body are the secretory source of:
1. progesterone
2. intestinal mucus
3. glucagon
4. androgens
Which of the sets of diseases are completely curable if detected early?
1. Hepatitis - B, Gonorrhoea, Syphilis
2. Genital herpes, Chlamydiasis, Syphilis
3. HIV Infections, Chlamydiasis, Gonorrhoea
4. Chlamydiosis, Syphilis, Gonorrhoea
The symptoms of common cold lasts for:
1. Generally 1 day
2. Generally 2-3 days
3. Usually, At maximum 14 days
4. Usually 3-7 days
The length of E. coli DNA and the length of DNA in a human 2N cell is:
1. 1.36 mm and 2.2 m respectively
2. 1.36 mm and 2.2 mm respectively
3. 1.3 ìm and 2.2 ìm respectively
4. 1.36 cm and 2.2 cm respectively
The compound Y in the above sequence of reactions is:
1. 1-Phenylethene
2. 2-Phenyl-2-propanol
3. Acetophenone
4. Benzaldehyde
The d-electron configuration of [Ru(en)3]Cl2 and [Fe(H2O)6]Cl2, respectively are :
1. t2g6 eg0 and t2g4 eg2
\(2.~ t_{2 g}^{4} e_{g}^{2}~ and ~t_{2 g}^{4} e_{g}^{2}\\ 3.~ t_{2 g}^{3} e_{g}^{3} ~and~ t_{2 g}^{4} e_{g}^{2}\\ 4.~ t_{2 g}^{4} e_{g}^{2} ~and~ t_{2 g}^{3} e_{g}^{3}\)
Assertion (A): | Chlorine is an electron-withdrawing group, yet it exhibits ortho- and para-directing behavior in electrophilic aromatic substitution. |
Reason (R): | Inductive effect of chlorine destabilises the intermediate carbocation formed during the electrophilic substitution, however due to the more pronounced resonance effect, the halogen stabilises the carbocation at ortho and para positions. |
1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
3. | (A) is True but (R) is False. |
4. | (A) is False but (R) is True. |
The reaction of NO with at 250 K gives :
1. | N2O5 | 2. | NO2 |
3. | N2O | 4. | N2O3 |
1. | 1.45 atm | 2. | 5.07 atm |
3. | 3.4 atm | 4. | 4 atm |
The major product of the following chemical reaction is :
\( \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CN} \xrightarrow[\text { (3) } \mathrm{Pd} / \mathrm{BaSO}_4, \mathrm{H}_2]{\text { (1) } \mathrm{H}_3 \mathrm{O}^{+},\Delta ~~(2) \mathrm{SOCl}_2} ?\)
1. | CH3CH2CH3 | 2. | CH3CH2CH2OH |
3. | (CH3CH2CO)2O | 4. | CH3CH2CHO |
Which combination among the following, when mixed in equal volumes, will result in the formation of a buffer solution?
1. | 0.1 mol dm–3 NH4OH and 0.1 mol dm–3 HCl |
2. | 0.05 mol dm–3 NH4OH and 0.1 mol dm–3 HCl |
3. | 0.1 mol dm–3 NH4OH and 0.05 mol dm–3 HCl |
4. | 0.1 mol dm–3 CH3COONa and 0.1 mol dm–3 NaOH |
One mole of sugar is dissolved in three moles of water at 298 K. The relative lowering of vapour pressure is:
1. | 0.25 | 2. | 0.15 |
3. | 0.50 | 4. | 0.33 |
In both DNA and RNA, heterocyclic base and phosphate ester linkages are at:
1. | C5' and C1' respectively of the sugar molecule |
2. | C1' and C5' respectively of the sugar molecule |
3. | C2' and C5' respectively of the sugar molecule |
4. | C5' and C2' respectively of the sugar molecule |
To neutralize 20 mL of 0.1 M aqueous solution of phosphorus acid \((H_3PO_3) \) completely, the volume of 0.1 M aqueous KOH solution required is:
1. | 10 mL | 2. | 20 mL |
3. | 40 mL | 4. | 60 mL |
The increasing order of the first ionization enthalpies of the elements B, P , S and F (lowest first) is :
1. | F < S < P < B | 2. | P < S < B < F |
3. | B < P < S < F | 4. | B < S < P < F |
The molality of a urea solution in which 0.0100 g of urea,
1. | 0.555 m | 2. | |
3. | 33.3 m | 4. |
The final product (III) obtained in the reaction sequence is:
1. | 2. | ||
3. | 4. | None of the above |
Energy of H-atom in the ground state is –13.6 eV. Hence, it can be concluded that the energy in the second excited state will be:
1. –6.8 eV
2. –3.4 eV
3. –1.51 eV
4. –4.53 eV
H2 gas is absorbed on the metal surface like gold, tungsten, etc. This follows ________ order reaction:
1. Third
2. Second
3. Zero
4. First
SN1 reaction is feasible in:
1. | |
2. | |
3. | |
4. |
The major product A in the following reaction is:
1. | |
2. | |
3. | |
4. | None of the above |
For the reaction:
Fe3O4 (s) + Al (s) → Fe (s) + Al2O3 (s)
The correct statement(s) in the equation is(are):
a. | Stoichiometric coefficient of Fe is 9. |
b. | Aluminium is oxidized |
c. | Ferrous ferric oxide (Fe3O4) is oxidize |
d. | Aluminium is reduced. |
1. a, c
2. a, b
3. b, c
4. c, d
The incorrect statement about H2SO4 is:
1. | It is used in the fertilizer industry. |
2. | It is used in the manufacture of pigments, paints, and detergents. |
3. | It is used in the manufacture of storage batteries. |
4. | It is a weak dehydrating agent. |
Incorrect match among the following is:
1. | Tetraamminediaquacobalt(III) chloride |
[Co(H2O)2(NH3)4]Cl3 |
2. | Ammine bromidochloridonitrito-N-platinate(II) |
[Pt(NH3)BrCl(NO2)]- |
3. | Dichloridobis (ethane−1,2−diamine) platinum(IV)nitrate |
[PtCl2(en)2](NO3)2 |
4. | Iron(III) hexacyanoferrate(II) | Fe2[Fe(CN)6]3 |
Match the oxide given in Column I with its property given in Column II:
Column I | Column II | ||
(i) | (a) | Neutral | |
(ii) | (b) | Basic | |
(iii) | (c) | Acidic | |
(iv) | (d) | Amphoteric |
Which of the following options is correct?
(i) | (ii) | (iii) | (iv) | |
1. | (b) | (a) | (d) | (c) |
2. | (c) | (b) | (a) | (d) |
3. | (a) | (d) | (b) | (c) |
4. | (b) | (d) | (a) | (c) |
The basic structural unit of silicates is:
1. | 2. | ||
3. | 4. |
1. | [Ne]3d1-10 4s2 | 2. | [Ar]3d1-10 4s1-2 |
3. | [Kr]4d1-10 5s1-2 | 4. | [Xe]5d1-10 5s1-2 |
1. | 2. | ||
3. | 4. |
1. | A | 2. | B |
3. | C | 4. | D |
The product(s) formed from the following reaction is/are:
1. | RCOOH only |
2. | RCH2COOH only |
3. | |
4. | RCOOH and RCH2COOH |
1. | 3,5,6-Trimethyloctane | 2. | 1,2,3,6-Tetramethylheptane |
3. | 3,4,6-Trimethyloctane | 4. | None of the above |
1. | 5 | 2. | 10 |
3. | 0.1 | 4. | 0.5 |
a. | \(Mn^{2+}\) shows the characteristic green color in the flame test |
b. | Only \(Cu^{2+}\) shows the formation of a precipitate by passing \(H_2S\) in acidic medium |
c. | Only \(Mn^{2+}\) shows the formation of precipitate by passing \(H_2S\) in faintly basic medium |
d. | \(Cu^{2+} / Cu\) has higher reduction potential than \(Mn^{2+}/Mn\) (measured under similar conditions) |
Mg is present in:
1. | Chlorophyll | 2. | Haemoglobin |
3. | Vitamin-B12 | 4. | Vitamin-B |
From the given options, the compound that has a planar structure is:
1. XeF4
2. XeOF2
3. XeO2F2
4. XeO4
An organic compound neither reacts with neutral ferric chloride solution nor with Fehling solution. It however, reacts with Grignard reagent and gives a positive iodoform test. The compound is:
1. | 2. | ||
3. | 4. |
The molecular geometry of SF6 is octahedral. The geometry of SF4 (including lone pair(s)) of electrons is:
1. Trigonal bipyramidal
2. Square planar
3. Tetrahedral
4. Pyramidal
The major product [B] in the following reaction is:
1. | 2. | ||
3. | 4. | \(CH_2=CH_2 \) |
6.023 × 1022 molecules are present in 10 g of substance ‘x’. The molarity of a solution containing 5 g of substance ‘x’ in 2L solution is:
1. 0.00025
2. 2.5
3. 0.025
4. 25
The variation of molar conductivity with the concentration of an electrolyte (X) in an aqueous solution is shown in the given figure.
The electrolyte X is:
1. | CH3COOH | 2. | KNO3 |
3. | HCl | 4. | NaCl |
For 1 molal aqueous solution of the following compounds, which one will show the highest freezing point ?
1. [Co(H2O)6]Cl3
2. [Co(H2O)5Cl]Cl2.H2O
3. [Co(H2O)4Cl2]Cl.2H2O
4. [Co(H2O)3Cl3].3H2O
The solubility product of Pbl2 is 8.0 × 10–9 . The solubility of lead iodide in 0.1 molar solution of lead nitrate is x × 10–6 mol/L. The value of x is:
(Rounded off to the nearest integer)
1. 154
2. 423
3. 282
4. 141
Sucrose hydrolysis in an acidic solution into glucose and fructose follows the first-order rate law with a half-life of 3.33 h at 25°C. After 9 h, the fraction of sucrose remaining is f. The value of \(log(\frac{1}{f})\) is A×10-2 . The value of A is:
(Rounded off to the nearest integer) [Assume : ln 10 = 2.303, ln 2 = 0.693]
1. 78
2. 81
3. 85
4. 75
The reaction of cyanamide, NH2CN(s) with oxygen was run in a bomb calorimeter and U was found to be –742.24 kJ mol–1 . The magnitude of (KJ) for the reaction
NH2CN(s) + \(\frac{3}{2}\)O2(g) → N2(g) + O2(g) + H2O(l) is-
[Assume ideal gases and R = 8.314 J
1. 741 KJ
2. 745 KJ
3. 720 KJ
4. 734 KJ
The number of 𝜎 and 𝜋-bonds in the molecule of tetracyanoethylene is:
1. 9𝜎 and 9𝜋
2. 5𝜎 and 9𝜋
3. 9𝜎 and 7𝜋
4. 5𝜎 and 8𝜋
Lattice energy of an ionic compound depends upon:
1. Charge on the ion and size of the ion
2. Packing of ions only
3. Size of the ion only
4. Charge on the ion only
Ph − C ≡ C − CH3 \(\xrightarrow[]{Hg^{2+}/H^{+}}\) A
In the above reaction, the structure of the product (A) is:
1. | 2. | ||
3. | 4. |
The increasing order of stability of the following free radicals is:
1. | \({({CH}_3})_2 \dot{{C}}H<{({CH}_3})_3 \dot{{C}}<{({C}_6 {H}_5})_2 \dot{{C}}H <{({C}_6 {H}_5})_3 \dot{{C}}\) |
2. | \(({{C}_{6} {H}_{5})}_{3} \dot{{C}}<({{C}_{6} {H}_{5})}_{2} \dot{{C}} {H}<({{CH}_{3})}_{3} \dot{{C}}<({{CH}_{3})}_{2} \dot{{C}}H\) |
3. | \(({{C}_{6} {H}_{5})}_{2} \dot{{C}} {H}<({{C}_{6} {H}_{5})}_{3} \dot{{C}}<({{CH}_{3})}_{3} \dot{{C}} <({{CH}_{3})}_{2} \dot{{C}}H \) |
4. | \(({{CH}_{3})}_{2} \dot{{C}} {H}<({{CH}_{3})}_{3} \dot{{C}}<({{C}_{6} {H}_{5})}_{3} \dot{{C}} <({{C}_{6} {H}_{5})}_{2} \dot{{CH}}\) |
Moment of inertia (M.I.) of four bodies, having same mass and radius, are reported as:
\(I_1\) | M.I. of thin circular ring about its diameter |
\(I_2\) | M.I. of circular disc about an axis perpendicular to the disc and going through the centre |
\(I_3\) | M.I. of solid cylinder about its axis |
\(I_4\) | M.I. of solid sphere about its diameter |
Then:
1. \(I_1+I_3<I_2+I_4\)
2. \(I_1+I_2= I_3+\frac{5}{2}I_4\)
3. \(I_1=I_2=I_3>I_4\)
4. \(I_1=I_2=I_3<I_4\)
1. | \(+\)ve X-direction with frequency \(1\) Hz and wavelength \(\lambda=0.2~\text{m}\) |
2. | \(-\)ve X-direction with amplitude \(0.25\) m and wavelength \(\lambda=0.2~\text{m}\) |
3. | \(-\)ve X-direction with frequency \(2\) Hz |
4. | \(+\)ve X-direction with frequency \(\pi\) Hz and wavelength \(\lambda=0.2~\text{m}\) |
1. | zero |
2. | unity |
3. | infinity |
4. | may have any finite non-zero value |
1. | only inside the pipe |
2. | only outside the pipe |
3. | both inside and outside the pipe |
4. | neither inside nor outside the pipe |
1. | increased |
2. | decreased |
3. | unchanged |
4. | fluctuating with time: first increasing and then decreasing |
1. | zero voltage | 2. | zener voltage |
3. | inverse voltage | 4. | critical voltage |
1. | 2. | ||
3. | 4. |
1. | created at the position of maxima. |
2. | destroyed at the position of minima. |
3. | conserved but redistributed. |
4. | all of the above. |
1. | It is correct both dimensionally as well as numerically. |
2. | It is neither dimensionally correct nor numerically. |
3. | It is dimensionally correct but not numerically. |
4. | It is numerically correct but not dimensionally. |
1. | \(8\%\) | 2. | \(9\%\) |
3. | \(10\%\) | 4. | \(11\%\) |
1. | \(0.4\%\) | 2. | \(0.6\%\) |
3. | \(0.8\%\) | 4. | \(1.0\%\) |
1. | \(0.12~\text{N}\) | 2. | \(0.48~\text{N}\) |
3. | \(1.2~\text{N}\) | 4. | \(4.8~\text{N}\) |
1. | zero. |
2. | equal to the weight of liquid displaced. |
3. | equal to the weight of the body in air. |
4. | equal to the weight of the immersed body. |
Two satellites \(A\) and \(B\) of masses \(200\) kg and \(400\) kg are revolving around the earth at height of \(600\) km and \(1600\) km respectively. If \(T_A\) and \(T_B\) are the time periods of \(A\) and \(B\) respectively, then the ratio \(\frac{T_A}{T_B}\) is:
[Given : radius of earth = \(6400\) km, mass of earth = \(6\times 10^{24}\) kg]
1. \(\left ( \frac{7}{8} \right )^{3}\)
2. \(\left ( \frac{7}{8} \right )^{3/2}\)
3. \(\left ( \frac{7}{8} \right )^{2/3}\)
4. \(\left ( \frac{7}{8} \right )^{1/3}\)
A body \(A\) is projected vertically upwards. Another body \(B\) of the same mass is projected at an angle of \(60^{\circ}\) with the horizontal. If both the bodies attain the same maximum height, the ratio of the initial kinetic energy of body \(A\) to that of body \(B\) is:
1. \(\frac{3}{4}\)
2. \(\frac{\sqrt{3}}{2}\)
3. \(\frac{1}{\sqrt{2}}\)
4. \(\frac{1}{2}\)
1. | There are definitely no "non-conservative" forces acting in this situation |
2. | At least one of the forces in this situation is "conservative" in nature |
3. | Work done by the "internal" forces would be \(-30\) joules |
4. | Work done by the "internal" forces would be \(-40\) joules |
1. | aluminum, boron, or selenium |
2. | aluminum, boron, or indium |
3. | phosphorus, antimony, or arsenic |
4. | cobalt, aluminum, or selenium |
1. | they have equal currents through them. |
2. | the resistances of both the bulbs are same. |
3. | the resistance of the bulb of \(40\) watts is more. |
4. | the resistance of the bulb of \(100\) watts is more. |
1. | increases. |
2. | decreases. |
3. | remains constant. |
4. | depends on the sense of rotation. |