The coconut water from tender coconut represents:
1. endocarp
2. fleshy mesocarp
3. free nuclear proembryo
4. free nuclear endosperm
The genotypes of a husband and Wife are IAIB and IAi. 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 rRNA acts as structural RNA as well as ribozyme in bacteria?
1. | 5S rRNA | 2. | 18S rRNA |
3. | 23S rRNA | 4. | 5.8S rRNA |
Baculoviruses have no negative effect over:
1. Plants, fish
2. Mammals
3. Birds, non-target insects
4. All of these
Which of the following enzyme is primarily responsible for the hydrolysis of the disaccharide, lactose into its monomeric units galactose and glucose in the Lac operon?
1. Beta-galactosidase
2. Permease
3. Transacetylase
4. Tyrosinase
Oparin of…… and Haldane of ….. proposed that the first form of life could have come from pre existing …………
1. Russia, England, non-living inorganic molecules
2. England, Russia, living organic matter
3. Russia, England, non-living organic molecules
4. England, Russia, life
If the carbon atoms fixed by producers already have passed through three species, the trophic level of the last species would be:
1. scavenger
2. tertiary producer
3. tertiary consumer
4. secondary consumer
Select the correct statement:
1. | Cholera, typhoid, tetanus are well-known diseases caused by viruses. |
2. | Dinoflagellates, euglenoids and slime moulds are placed under kingdom Monera |
3. | Members of kingdom Protista are primarily aquatic |
4. | Dinoflagellates are the chief 'producers' in the oceans |
Phyllotaxy is a:
1. Pattern of arrangement of leaves on the stem or branch
2. Pattern of arrangement of petals on the stem or branch
3. Pattern of arrangement of sepals on the flower
4. Pattern of arrangement of perianth on the flower
1. | Meristem | 2. | Anther |
3. | Embryo | 4. | Internode |
In Mendel's experiments with garden pea, round seed shape (RR) was dominant over wrinkled seeds (rr), yellow cotyledon (YY) was dominant over green cotyledon (yy). What are the expected phenotypes in the F2 generation of the cross RRYY x rryy?
1. | Only round seeds with green cotyledons |
2. | Only wrinkled seeds with yellow cotyledons |
3. | Only wrinkled seeds with green cotyledons |
4. | Round seeds with yellow cotyledons and wrinkled seeds with yellow cotyledons |
The oldest known viable seeds have been reported from which of the following plants?
1. Phoenix dactylifera
2. Nelumbium species
3. Lupinus arcticus
4. Cedrus deodara
Nomenclature is:
1. | assigning a single name to an organism valid all over the world. |
2. | defining properties of an organism. |
3. | localizing the area of abundance for that organism. |
4. | assigning three sets of name applicable at different levels of classification. |
Expressed Sequence Tags (ESTs) refers to:
1. Novel DNA sequence
2. Genes expressed as RNA
3. Polypeptide expression
4. DNA polymorphism
The organelles that are included in the endomembrane system are:
1. | Golgi complex, Mitochondria, Ribosomes and Lysosomes |
2. | Golgi complex, Endoplasmic reticulum, Mitochondria and Lysosomes |
3. | Endoplasmic reticulum, Mitochondria, Ribosomes and Lysosomes |
4. | Endoplasmic reticulum, Golgi complex, Lysosomes and Vacuoles |
What type of ecological pyramid would be obtained with the following data?
Secondary consumer: 120 g
Primary consumer: 60 g
Primary producer: 10 g
1. Inverted pyramid of biomass
2. Pyramid of energy
3. Upright pyramid of numbers
4. Upright pyramid of biomass
Agarose extracted from sea weeds finds use in:
1. Spectrophotometry
2. Tissue Culture
3. PCR
4. Gel electrophoresis
Why photorespiration does not take place in C4 plants?
1. | do not contain RuBisCo. |
2. | have a mechanism that increases the concentration of CO2 at the enzyme site. |
3. | Cells do not allow oxygen to accumulate in them. |
4. | Cells are impermeable to oxygen. |
Mark a, b, c, and d:
1. Metaxylem, protoxylem, cortex, trichome
2. Endodermis, cortex, protoxylem, root hair
3. Endodermis, cortex, metaxylem, root hair
4. Pericycle, cortex, metaxylem, trichome
Match the organisms in column I with habitats in column II.
Column I | Column II | ||
(a) | Halophiles | (i) | Hot springs |
(b) | Thermoacidophiles | (ii) | Aquatic environment |
(c) | Methanogens | (iii) | Guts of ruminants |
(d) | Cyanobacteria | (iv) | Salty areas |
Select the correct answer from the options given below:
(a) | (b) | (c) | (d) | |
1. | (iv) | (i) | (iii) | (ii) |
2. | (i) | (ii) | (iii) | (iv) |
3. | (iii) | (iv) | (i) | (ii) |
4. | (ii) | (iv) | (iii) | (i) |
Select the correct group of biocontrol agents:
1. Nostoc, Azospirillium, Nucleopolyhedrovirus
2. Bacillus thuringiensis. Tobacco mosaic virus, Aphids
3. Trichoderma, Baculovirus, Bacillus thuringiensis
4. Oscilatoria, Rhizobium, Trichoderma
Pinus seed cannot germinate and establish without fungal association. This is because:
1. its seeds contain inhibitors that prevent germination.
2. its embryo is immature.
3. it has an obligate association with mycorrhizae.
4. it has a very hard seed coat.
Consider the following four statements A, B, C and D and select the right option for two correct statements:
(A) | In vexillary aestivation, the large posterior petal is called standard, two lateral ones are wings and two small anterior petals are termed keel |
(B) | The floral formula for Lillaceae is |
(C) | In pea flower the stamens are monadelphous |
(D) | The floral formula for Solanaceae is |
The correct statements are:
1. | (A) and (C) |
2. | (A) and (B) |
3. | (B) and (C) |
4. | (C) and (D) |
Which one of the following statements is not true?
1. | Pollen grains of some plants cause severe allergies and bronchial afflictions in some people |
2. | The flowers pollinated by flies and bats secrete foul odour to attract them |
3. | Honey is made by bees by digesting pollen collected from flowers |
4. | Pollen grains are rich in nutrients, and they are used in the form of tablets and syrups |
Select the two correct statements out of the four (a-d) given below about lac operon:
(a) | Glucose or galactose may bind with the repressor and inactivate it |
(b) | In the absence of lactose the repressor binds with the operator region |
(c) | The z-gene codes for permease |
(d) | This was elucidated by Francois Jacob and jacque Monod |
The correct statements are:
1. | (a) and (c) |
2. | (b) and (d) |
3. | (a) and (b) |
4. | (b) and (c) |
In some Camellia cultivars, a cross between a red homozygous flower and a white homozygous flower will produce offspring that have red and white spots as shown in the given diagram. This can best be explained by:
1. Incomplete dominance
2. Co-dominance
3. Pleiotropy
4. Variable expressivity
I. | Exine is made up of sporopollenin |
II. | Generative cell is bigger than the vegetative cell |
III. | Generative cell divides meiotically to produce male gametes |
I: | Majority of flowering plants use a range of animals as pollinating agents. |
II: | Birds except sunbirds and humming birds are common pollinators. |
III: | Bats also pollinate some plants. |
IV: | Among the animals, insects, particularly bees are the dominant biotic pollinating agents. |
V: | No known reptile is a pollinating agent for any plant. |
1. | 2 | 2. | 3 |
3. | 4 | 4. | 5 |
Statement I: | Agro-chemical based agriculture is not a suitable method for increasing food production worldwide in the future. |
Statement II: | Agrochemicals are often too expensive for farmers in the developing world. |
1. | Glycolysis | 2. | Fermentation |
3. | Krebs cycle | 4. | Electron transport |
1. | Cytochrome bc1 complex | 2. | Cytochrome b6f complex |
3. | Cytochrome c oxidase | 4. | Cytochrome c |
1. | Pleiotropy | 2. | Plasticity |
3. | Convergence | 4. | Saltation |
1. | straight line | 2. | rectangular hyperbola |
3. | parabola | 4. | concave up curve |
The classification of bacteria into Gram positive and Gram negative had been possible due to:
1. difference in cell envelopes
2. differences in staining procedure
3. differences in decolorising process
4. All of the above
Transfer of pollen grains from the anther of one flower to the stigma of another flower of the same plant is called as:
1. | Xenogamy | 2. | Autogamy |
3. | Geitonogamy | 4. | Cleistogamy |
Which of the following is mis-matched pair?
1. Belladonna - Medicine - Solanaceae
2. Asparagus - Vegetable - Liliaceae
3. Trifolium - Ornamental plant - Fabaceae
4. Tobacco - Fumigatory - Potato family
Choose the incorrect match:-
1. Diatoms - Silicated cell wall
2. Gonyaulax - Soap box-like cell wall
3. Albugo - Parasite on mustard
4. Euglenoids - Mixotrophic nutrition
The rise in respiration rate of fruit is called?
1. | Respiratory quotient | 2. | Respiratory climactic |
3. | Respiratory incision | 4. | Respiratory succulence |
When does the growth rate of a population, following the logistic model, equal zero?
1. When N/K is exactly one
2. When N nears the carrying capacity of the habitat
3. When N/K equals zero
4. When dearth rate is greater than birth rate
The process which makes major difference between C3 and C4 plants is:
1. | glycolysis | 2. | Calvin cycle |
3. | photorespiration | 4. | respiration |
Which among the following pteridophytes has compact structure strobili formed by sporophylls as well as it shows heterospory?
[A] | [B] | [C] |
1. | [A] | 2. | [B] |
3. | [C] | 4. | All the above |
Consider the statements a, b, c and d with respect to fermentation by yeast and select the correct choice:
a. | Production of and ethanol |
b. | Complete oxidation of glucose |
c. | The reducing agent is NADH + |
d. | It is achieved under anaerobic condition |
1. | a & b are incorrect |
2. | b is incorrect |
3. | a & c is incorrect |
4. | all are incorrect |
Match Column-I with Column-II.
Column I | Column II | ||
(a) | Protein | (i) | C=C double bonds |
(b) | Unsaturated fatty acid | (ii) | Phosphodiester bonds |
(c) | Nucleic acid | (iii) | Glycosidic bonds |
(d) | Polysaccharides | (iv) | Peptide bonds |
Choose the correct answer from the options given below:
(a) | (b) | (c) | (d) | |
1. | (ii) | (i) | (iv) | (iii) |
2. | (iv) | (iii) | (i) | (ii) |
3. | (iv) | (i) | (ii) | (iii) |
4. | (i) | (iv) | (iii) | (ii) |
If you are provided with root-tips of an onion in your class and are asked to count the chromosomes, which of the following stages can you most conveniently look into?
1. Telophase
2. Anaphase
3. Prophase
4. Metaphase
1. | Heart wood does not conduct water but it gives mechanical support to the stem. |
2. | Autumn wood or late wood has a large number of xylary elements having vessels with wider cavities. |
3. | Phloem fibers are generally absent in the primary phloem |
4. | Gymnosperms lack sieve tubes and companion cells |
1. | Pollination by wind is more common amongst abiotic pollinations. |
2. | Wind-pollination is quite common in grasses. |
3. | Almost all gymnosperms are pollinated by wind. |
4. | Almost all angiosperms are pollinated by wind. |
Assertion (A): | Seed is the basis of our agriculture. |
Reason (R): | Seeds are normally the products of sexual reproduction in angiosperms. |
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 |
1. | Only I | 2. | Only II |
3. | Both I and II | 4. | Neither I nor II |
Which of the following statements is wrong?
1. | Bones and cartilages are specialised connective tissues |
2. | Skeletal system consists of a framework of less than hundred bones and cartilages |
3. | Bones have a hard matrix due to calcium salt deposition |
4. | Cartilages have a pliable matrix due to chondroitin salts |
Which of the following statements is not related to centriole?
1. | Made up of nine evenly spaced peripheral fibrils of tubulin protein |
2. | Spindle fibres that give rise to spindle apparatus during cell division in plant cells |
3. | The central part of the proximal region is called the hub |
4. | It forms the basal body of eukaryotic flagella |
Which one of the following represents a palindromic sequence in DNA?
1. | 5' - GAATTC - 3' | 3' - CTTAAG - 5' |
2. | 5' - CCAATG - 3' | 3' - GAATCC - 5' |
3. | 5' - CATTAG - 3' | 3' - GATAAC - 5' |
4. | 5' - GATACC - 3' | 3' - CCTAAG - 5' |
The hepatic portal system is:
1. Between digestive tract and hypothalamus
2. Between digestive tract and liver
3. Between liver and hypothalamus
4. Between liver and pituitary
The network of peritubular capillaries is formed by:
1. Efferent Arteriole
2. Afferent Arteriole
3. Efferent Arteries
4. Afferent Arteries
The number of correct statements amongst the given statements is:
I. | Amino acids are substituted methanes. |
II. | The R group in serine is hydroxyl-methyl. |
III. | Arachidonic acid has 20 carbon atoms including carboxyl carbon. |
IV. | Glycerol is trihydroxypropane. |
V. | Lecithin is a phospholipid. |
1. 2
2. 3
3. 4
4. 5
Consider the following statements:
I. | Somatic neural system relays impulses from CNS to skeletal muscles. |
II. | Autonomic neural system transmits impulses from CNS to involuntary organs and smooth muscles |
III. | Unmyelinated nerve fibres are commonly found in spinal and cranial nerves |
1. | I and II only |
2. | I and III only |
3. | II and III only |
4. | I, II, and III |
Which of the following hormone is known as emergency hormone?
1. Adrenaline
2. Nor-adrenaline
3. Catecholamines
4. All of these
Vertebral column is formed in place of:
1. Dorsal nerve cord
2. Ventral nerve cord
3. Outgrowth of cranium
4. Notochord
The normal E. coli cells have:
1. Kanamycin
2. Tetracycline
3. Ampicillin
4. No resistance
Which of the following was the novel insight of Darwin in his theory?
1. | Variations are heritable and make resource utilisation better for few will enable only those to reproduce and leave more progeny. |
2. | Population size will grow exponentially if everybody reproduced maximally. |
3. | Natural resources are limited yet populations are stable in size except for seasonal fluctuations. |
4. | Members of populations vary in characteristics. |
Given is the diagrammatic sectional view of the ovary. Identify the labelled parts (i), (ii), (iii) and (iv)
(i) | (ii) | (iii) | (iv) | |
1. | Tertiary follicle | Corpus luteum | Graafian follicle | Primary follicle |
2. | Graafian follicle | Corpus luteum | Tertiary follicle | Primary follicle |
3. | Corpus luteum | Graafian follicle | Tertiary follicle | Primary follicle |
4. | Graafian follicle | Tertiary follicle | Secondary follicle | Primary follicle |
During sickle cell anemia:
1. | Double base pairs are changed in the gene |
2. | Glutamic acid is substituted by valine |
3. | Single base substitution at the third codon of the beta-globin gene from GUG to GAG |
4. | Individuals with HbSHbA show diseased phenotype |
Select the correct statement about biodiversity:
1. | The desert areas of Rajasthan and Gujarat have a very high level of desert animal species as well as numerous rare animals. |
2. | Large scale planting of Bt cotton has no adverse effect on biodiversity. |
3. | Western Ghats have a very high degree of species richness and endemism. |
4. | Conservation of biodiversity is just a fad pursued by developed countries. |
The two polypeptides of human insulin are linked together by:
1. Hydrogen bonds
2. Phosphodiester bond
3. Covalent bond
4. Disulphide bridges
Which of the following represents the prokaryotic cell?
1. bacteria, blue-green algae, mycoplasma, PPLO
2. bacteria, blue-green algae, microbes, chlorella
3. bacteria, blue-green algae, slime moulds and Diatoms
4. bacteria, blue-green algae only
All the ribs are attached to:
1. Sternum
2. Vertebral column
3. Clavicle
4. ilium
First discovered restriction endonuclease that always cuts DNA molecule at a particular point by recognizing a specific sequence of six base pairs is:
1. EcoR1
2. Adenosine deaminase
3. Thermostable DNA polymerase
4. Hind II
The development of P.americana is:
1. Holometabolous
2. Paurometabolous
3. Hemimetabolous
4. Ametabolous
Which one of the following statement is true regarding Angina?
1. Heart stops beating
2. more common in children
3. Does not affect the blood flow
4. No enough oxygen is reaching to heart muscles
In a child of 15 years age, plasma calcium level is diagnosed below optimum level. Which organ is malfunctioning?
1. Thyroid gland
2. Liver
3. Parathyroid
4. Posterior lobe of pituitary
Refer to the given figure of nephron.
Identify A, B, C, and D and select the correct option regarding them:
1. | A- Glomerulus-a tuft of capillaries formed by afferent arteriole. |
2. | B-PCT-reabsorption of HCO3- and selective secretion of H+ and K+ occurs here. |
3. | C-DCT-almost all glucose, amino acids, water, Na+, K+, and uric acid are absorbed here. |
4. | D-collecting duct extends from the cortex of the kidney to the inner parts of the medulla. A large amount of water is secreted in this region. |
Chemosensitive area of respiratory centre medulla is affected by:
1. less and ions
2. less and ions
3. excess and H+ ions
4. excess and H+ ions.
Artificial insemination means:
1. | transfer of sperms of a healthy donor to a test-tube containing ova |
2. | transfer of sperms of husband to a test tube containing ova |
3. | artificial introduction of sperms of a healthy donor into the vagina |
4. | introduction of sperms of healthy donor directly into the ovary |
Which of the following is true about compounds present in acid insoluble pool?
1. | They have molecular weight ranging from 10,000 Daltons and above except lipids |
2. | They are called as Macromolecules |
3. | They are called as Biomacromolecules |
4. | All of the above |
Five events in the transmission of nerve impulse across the synapse:
A. | Opening of specific ion channels allows the entry of ions, a new action potential is generated in the post-synaptic neuron |
B. | Neurotransmitter binds to the receptor on post-synaptic membrane. |
C. | Synaptic vesicle fuses with pre-synaptic membrane, neurotransmitter releases into synaptic cleft |
D. | Depolarization of pre-synaptic membrane |
E. | Arrival of an action potential at the axon terminal |
In which sequence do these events occur?
1. | E → D → C → B → A |
2. | A → B → C → D → E |
3. | A → B → D → C → E |
4. | E → D → C → A → B |
One example of animals having a single opening to the outside that serves both as mouth as well as anus is–
1. Asterias
2. Ascidia
3. Fasciola
4. Octopus
Select the correct statement from the ones given below:
1. | Morphine is often given to persons who have undergone surgery as a pain killer |
2. | Chewing tobacco lowers blood pressure and heart rate |
3. | Cocaine is given to patients after surgery as it stimulates recovery |
4. | Barbiturates when given to criminals make them tell the truth |
De Vries gave his mutation theory on organic evolution while working on:
1. Oenothera lamarckiana
2. Drosophila melanogaster
3. Pisum sativum
4. Althea rosea
What happens during fertilisation in humans after many sperms reach close to the ovum?
1. | Only two sperms nearest the ovum penetrate zona pellucida. |
2. | Secretion of acrosome helps one sperm enter cytoplasm of ovum through zona pellucida. |
3. | All sperms except the one nearest to the ovum lose their tails. |
4. | Cells of corona radiata trap all the sperm except one. |
I: | is a fungal infection of the skin. |
II: | is typically caused by Trichoderma, Macrosporum, or Epicoccum |
1. | muscle fiber | 2. | sarcomere |
3. | myofilament | 4. | myofibril |
1. | poliomyelitis | 2. | myasthenia gravis |
3. | multiple sclerosis | 4. | Duchenne muscular dystrophy |
The volume of air involved in breathing movements can be estimated by using:
1. ECG
2. Sphygmomanometer
3. Spirometer
4. Barometer
Which of the following is not a correct statement?
1. | Marey's law states that heart rate is inversely related to the systemic B.P. |
2. | Amount of blood received by brain is 750 ml per minute |
3. | Lub is the louder sound produced due to sudden opening of AV valves at the beginning of ventricular systole |
4. | For safe blood transfusion, recipient's serum should not contain antibodies against donor's antigen |
The production of urea and uric acid is because of:
1. | Conservation of water |
2. | Terrestrial adaptation |
3. | Terrestrial adaptation for conservation of water |
4. | Advancement of organism in comparison to all water animals |
The mammary glands of female undergo differentiation:
1. Just after parturition
2. During Gestation
3. After a few hours of parturition
4. Puberty
Bilaterally symmetrical animals can be acoelomate, pseudocoelomate, or coelomate. Study the diagrammatic representation of body cavity and the animal illustrated in diagrams A to D.
A. | Triploblastic acoelomate solid mesoderm |
||
B. | Pseudocoelomate partially open coelom, formed by retention of embryonic blastocoel |
||
C. | Coelomate, body cavity lined by mesoderm | ||
D. | Diploblastic acoelomate |
How many of the above illustrations are correct?
1. Four
2. Three
3. Two
4. One
Which of the following is not a salient observation drawn from human genome project?
1. | Chromosome 1 has most genes |
2. | More than 50% of the genome codes for proteins |
3. | Dystrophin is the largest human gene |
4. | The function for over 50% of the discovered genes are unknown |
The early-stage human embryo distinctly possesses:
1. gills
2. gill slits
3. external ear (pinna)
4. eyebrows
Which of the following is not a correct pair of animals representing convergent evolution?
1 Anteater and Numbat
2 Lemur and Flying phalanger
3 Bobcat and Tasmanian cat
4 Wolf and Tasmanian wolf
Which of the following is not true for cerebrum?
1. | Forms the major part of the human brain |
2. | A deep cleft divides transversely into two halves |
3. | Cerebral hemispheres are longitudinal halves |
4. | The hemispheres are connected by a tract of nerve fibres called corpus callosum |
Given ahead is an incomplete table about certain hormone, their source glands and one major effect of each on the body in humans. Identify the correct option for the three blanks A, B and C:
Gland | Secretion | Effect on Body |
A | Oestrogen | Maintenance of secondary sexual characters |
Alpha cells of islets of Langerhans | B | Raises blood sugar level |
Anterior pituitary | C | Oversecretion leads to gigantism |
Options: | A | B | C |
1. | Placenta | Insulin | Vasopressin |
2. | Ovary | Insulin | Calcium |
3. | Placenta | Glucagon | Calcitonin |
4. | Ovary | Glucagon | Growth hormone |
The following diagram represents the right pectoral girdle and upper arm. The letters a, b, c and d represent which bones?
Options: | (a) | (b) | (c) | (d) |
1. | Acromion process | Humerus | Radius | Ulna |
2. | Clavicle | Humerus | Radius | Ulna |
3. | Clavicle | Humerus | Ulna | Radius |
4. | Clavicle | Femur | Radius | Ulna |
Among animals, which of the following is the most species-rich taxonomic group?
1. Insects
2. Molluscs
3. Crustacean
4. Other animal groups
Fertilisation in humans is practically feasible only if:
1. | the ovum and sperms are transported simultaneously to ampullary-isthmic junction of the fallopian tube |
2. | the ovum and sperms are transported simultaneously to ampullary-isthmic junction of the cervix |
3. | the sperms are transported into cervix within 48 hrs of release of ovum in uterus |
4. | the sperms are transported into vagina just after the release of ovum in fallopian tube |
MTP was legalised in India in:
1. 1971
2. 1951
3. 1981
4. 1923
By inhaling aerosols released by an infected person causes spread of which disease certainly?
1. Malaria
2. Pneumonia
3. Plague
4. Filariasis
The reagent used for the separation of acetaldehyde from acetophenone is:
1. NaHSO3
2. C6H5NHNH2
3. NH2OH
4. NaOH and I2
The one that is not expected to show isomerism is :
1. [Ni(NH3)4(H2O)2]2+
2. [Ni(NH3)2Cl2]
3. [Pt(NH3)2Cl2]
4. [Ni(en)3]2+
In the following reaction the reason why meta-nitro product also formed is:
1. Low temperature
2. –NH2 group is highly meta-directive
3. Formation of anilinium ion
4. –NO2 substitution always takes place at meta-position
The number of bonds in perchloric acid is:
1. 4
2. 5
3. 2
4. 3
B reacts with hydroxylamine but does not give Tollen's test. A and B are respectively:
1. 1,1-Dichlorobutane and 2-Butanone
2. 2,2-Dichlorobutane and Butanal
3. 1,1-Dichlorobutane and Butanal
4. 2,2-Dichlorobutane and 2-butanone
A gas absorbs a photon of 355 nm and emits at two wavelengths. If one of the emissions is at 680 nm, the other is at:
1. 1035 nm
2. 325 nm
3. 743 nm
4. 518 nm
The first and second dissociation constants of an acid H2A are 1.0 × 10–5 & 5.0 × 10–10 respectively. The overall dissociation constant of the acid will be :
1. | 5.0 × 10–5 | 2. | 5.0 × 1015 |
3. | 5.0 × 10–15 | 4. | 0.2 × 105 |
The major product obtained when glucose reacts with bromine water among the following is:
1. Gluconic acid
2. Glyceraldehyde
3. Sorbitol
4. Saccharic acid
The ion having the highest value of ionic radius among the following is:
1. Li+
2. B3+
3. O2-
4. F-
\(6.02\times10^{20}\) molecules of urea are present in 100 mL of its solution. The concentration of urea solution is:
(Avogadro constant, \(N_A=6.02\times10^{23}~mol^{-1}\))
1. 0.001 M
2. 0.01 M
3. 0.02 M
4. 0.1 M
Solution A contains 7 g/L of
1. Solution A is greater than B
2. Both have the same osmotic pressure
3. Solution B is greater than A
4. Cannot be determined
1,2-dibromocyclohexane on dehydrohalogenation gives:
1. | 2. | ||
3. | 4. | None of these |
C4H10O gives white precipitate within 5 min with concentrated hydrochloric acid in the presence of anhydrous zinc chloride.
The alcohol can be:
1. | 2. | ||
3. | 4. |
Half-life of substance A following first order kinetics is 5 days. Starting with 100g of A, the amount left after 15 days will be:
1. 25 g
2. 50 g
3. 12.5 g
4. 6.25 g
The most stable ion is :
1. [Fe(OH)5]3-
2. [FeCl6]3-
3. [Fe(CN)6]3-
4. [Fe(H2O)6]3+
The oxidation number of Cl in CaOCl2 (bleaching powder) is:
1. zero, since it contains Cl2
2. -1, since it contains Cl-
3. +1, since it contains ClO-
4. +1 and -1 since it contains ClO- and Cl-
For the reaction equilibrium, \(\mathrm{N}_{2} \mathrm{O}_{4}(g) \rightleftharpoons 2 \mathrm{NO}_2(g) \), the concentrations of N2O4 and NO2 at equilibrium are 4.8 \(\times\) 10-2 and 1.2 \(\times\) 10-2 mol L-1 respectively. The value of Kc for the reaction is:
1. 3.3 \(\times\) 102 mol L-1
2. 3 \(\times\) 10-1 mol L-1
3. 3 \(\times\) 10-3 mol L-1
4. 3 \(\times\) 103 mol L-1
The radius of La3+ (Atomic number of La =57) is 1.06 Å. Which one of the following given values will be closest to the radius of Lu3+ (Atomic number of Lu = 71)?
1. 1.60 Å
2. 1.40 Å
3. 1.06 Å
4. 0.85 Å
Consider the following reaction:
PCl5 + H2O → A + 2HCl
The product A is :
1. H3PO2
2. H3PO4
3. POCl3
4. None of the above
Name the type of the structure of silicate in which one oxygen atom of [SiO4]4- is shared:
1. Sheet silicate
2. Pyrosilicate
3. Three dimensional silicate
4. Linear chain silicate
Statement I: | Pressure, molar heat capacity, density, mole fraction, specific heat, temperature, and molarity are intensive properties. |
Statement II: | Mass, internal energy, and heat capacity are extensive properties. |
1. | 2. | ||
3. | 4. |
1. | |
2. | |
3. | |
4. | None of the above |
1. | 2. | ||
3. | 4. |
Two half cell reactions are given below:
\(\begin{aligned} &\mathrm{Co}^{3+}+e^{-} \rightarrow \mathrm{Co}^{2+}, \mathrm{E}_{\mathrm{Co}^{2+} / \mathrm{Co}^{3+}}^{\circ}=-1.81 \mathrm{~V} \\ &2 \mathrm{Al}^{3+}+6 e^{-} \rightarrow 2 \mathrm{Al}(\mathrm{s}), \mathrm{E}_{\mathrm{Al} / \mathrm{Al}^{3+}}^{\circ}=+1.66 \mathrm{~V} \end{aligned} \)
The standard EMF of a cell with feasible redox reaction will be:
1. | +7.09 V | 2. | +0.15 V |
3. | +3.47 V | 4. | –3.47 V |
1. | |
2. | |
3. | |
4. |
(a) | \(\left(\mathrm{CH}_3\right)_2 \stackrel{\oplus}{\mathrm{C}}-\mathrm{CH}_2-\mathrm{CH}_3 \) |
(b) | \(\left(\mathrm{CH}_3\right)_3 \stackrel{\oplus}{\mathrm{C}} \) |
(c) | \(\left(\mathrm{CH}_3\right)_2 \stackrel{\oplus}{\mathrm{C}}\mathrm{H} \) |
(d) | \( \text {CH}_3 \stackrel{\oplus}{\mathrm{C}}\mathrm{H}_2\) |
(e) | \( \stackrel{\oplus}{\mathrm{C}}\mathrm{H}_3 \) |
1. | e < d < c < a < b | 2. | d < e < c < a < b |
3. | a < e < d < c < b | 4. | e < d < c < b < a |
1. | +1.77 V | 2. | +2.65 V |
3. | +0.01 V | 4. | +0.89 V |
Indicate the complex ion that shows geometrical isomerism:
1. [Cr(H2O)4 Cl2]+
2. [PT(NH3)3 Cl]
3. [Co(NH3)6]3+
4. [Co(CN)6]3-
In a cyclotrimetaphosphoric acid molecule, how many single and double bonds are present?
1. | 3 double bonds; 9 single bonds. |
2. | 6 double bonds; 6 single bonds |
3. | 3 double bonds; 12 single bunds |
4. | Zero double bonds; 12 single bonds |
In a set of the given reactions, acetic acid yielded a product C.
\(\mathrm{CH_3COOH+PCl_5\rightarrow A\xrightarrow[Anh.AlCl_3]{C_6H_6}B\xrightarrow[ether]{C_2H_5MgBr}C}\)
Product C would be:
1. | CH3CH(OH)C2H5 |
2. | CH3COC6H5 |
3. | CH3CH(OH)C6H5 |
4. |
Consider the values of reduction potential,
\(\mathrm{CO}^{3+}+e^{-} \rightarrow \mathrm{CO}^{2+} ; E^{\circ}=+1.81 \mathrm{~V}\)
\(\mathrm{~Pb}^{4+}+2 e^{-} \rightarrow \mathrm{Pb}^{2+} ; E^{\circ}=+1.67 \mathrm{~V}\)
\(\mathrm{Ce}^{4+}+e^{-} \rightarrow C e^{3+} ; E^{\circ}=+1.61 \mathrm{~V}\)
\( \mathrm{Bi}^{3+}+3 e^{-} \rightarrow \mathrm{Bi} ; E^{\circ}=+0.20 \mathrm{~V}\)
the oxidizing power of the species will increase in the order of:
1. | \(C o^{3+}<C e^{4+}<B i^{3+}<P b^{4+}\) |
2. | \(\mathrm{Co}^{3+}<P b^{4+}<C e^{4+}<B i^{3+}\) |
3. | \(C e^{4+}<P b^{4+}<B i^{3+}<C o^{3+}\) |
4. | \(B i^{3+}<C e^{4+}<P b^{4+}<C o^{3+}\) |
The shape/structure of [XeF5]– and XeO3F2, respectively, are :
1. Pentagonal planar and trigonal bipyramidal
2. Trigonal bipyramidal and pentagonal planar
3. Octahedral and square pyramidal
4. Trigonal bipyramidal and trigonal bipyramidal
An organic compound 'A' (C9H10O) when treated with conc. HI undergoes cleavage to yield compounds 'B' and 'C'. 'B' gives a yellow precipitate with AgNO3 whereas 'C' tautomerizes to 'D'. 'D' gives a positive iodoform test. 'A' could be:
1. | |
2. | |
3. | |
4. |
Complex A has a composition of H12O6Cl3Cr . If the complex on treatment with concentrated H2SO4 loses 13.5% of its original mass, the correct molecular formula of A is :
[ Given: atomic mass of Cr = 52 amu and Cl =35 amu]
1. [Cr(H2O)5Cl]Cl2H2O
2. [Cr(H2O)6]Cl3
3. [Cr(H2O)3Cl3]3H2O
4. [Cr(H2O)4Cl2]Cl2H2O
The rate constant (k) of a reaction is measured at different temperatures (T), and the data are plotted in the given figure. The activation energy of the reaction in kJ mol–1 is:
(R is gas constant)
1. 2R
2. R
3. 1/R
4. 2/R
If a compound AB dissociates to the extent of 75% in an aqueous solution, the molality of the solution which shows a 2.5 K rise in the boiling point of the solution is:
(Rounded-off to the nearest integer) [Kb = 0.52K kg mol–1]
1. 3
2. 5
3. 7
4. 2
For the reaction A(g)(B)(g), the value of the equilibrium constant at 300 K and 1 atm is equal to 100.0. The value of rG for the reaction at 300 K and 1 atm in J mol–1 is – xR, where x is:
(R = 8.31 J mol–1 K–1 and ln 10 = 2.3)
1. 1400
2. 1380
3. 1360
4. 1340
Which pair of oxides are acidic in nature?
1.
2.
3.
4.
The average S–F bond energy in kJ mol–1 of SF6 is:
[The values of standard enthalpy of formation of
SF6(g), S(g), and F(g) are –1100, 275, and 80 kJmol–1 respectively.]
1. 309 kJ mol–1
2. 313 kJ mol–1
3. 305 kJ mol–1
4. 318 kJ mol–1
The optically active alkane with the lowest molecular weight is :
1. | |
2. | |
3. | |
4. |
Propyne on passing through a red hot iron tube gives:
1. | 2. | ||
3. | 4. | None of these |
The decreasing order of nucleophilicity among the given nucleophiles is:
(A) | (B) | ||
(C) | (D) |
1. (C), (B), (A), (D)
2. (B), (C), (A), (D)
3. (D), (C), (B), (A)
4. (A), (B), (C), (D)
A slender uniform rod of mass \(M\) and length \(l\) is pivoted at one end so that it can rotate in the vertical plane (see figure). There is negligible friction at the pivot. The free end is held vertically above the pivot and then released. The angular acceleration of the rod when it makes an angle \(\theta\) with the vertical is:
1. \(\frac{3g}{2l}\sin\theta\)
2. \(\frac{2g}{3l}\sin\theta\)
3. \(\frac{3g}{2l}\cos\theta\)
4. \(\frac{2g}{3l}\cos\theta\)
Given below are two statements:
Assertion (A): | Angular momentum of an isolated system of particles is conserved. |
Reason (R): | The net torque on an isolated system of particles is zero and the rate of change of angular momentum equals the torque. |
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. |
1. | two extra protons and two extra electrons. |
2. | two extra protons but no extra electrons. |
3. | two extra neutrons but no extra electrons. |
4. | two extra neutrons and two extra electrons. |
1. | increase in temperature and decrease in pressure |
2. | decrease in temperature and increase in pressure |
3. | decrease in temperature and decrease in pressure |
4. | increase in temperature and increase in pressure |
1. | half-integral multiple of the least amount of charge |
2. | zero |
3. | square of the least amount of charge |
4. | integral multiple of the least amount of charge |
1. | \(1.33\times10^8\) | 2. | \(0.75\times10^{-8}\) |
3. | \(12\times10^{-8}\) | 4. | \(14\times10^{-8}\) |
1. | light passing from water to air |
2. | light passing from glass to diamond |
3. | light passing from water to glass |
4. | light passing from air to glass |
For the myopic eye, the defect is cured by:
1. convex lens
2. concave lens
3. cylindrical lens
4. toric lens
1. | in forward biasing, the diode resistance is \(R\). |
2. | in reverse biasing, the diode resistance is \(R\). |
3. | in forward biasing, the diode resistance is zero. |
4. | in reverse biasing, the diode resistance is zero. |
1. | are at very high temperatures |
2. | move with high velocities |
3. | have kinetic energies similar to those of surrounding molecules |
4. | are at rest |
1. | 2. | ||
3. | 4. |
1. | no current flows in the circuit |
2. | current flows anticlockwise |
3. | current flows clockwise |
4. | current only flows through \(D_2\) and not through \(D_1\) |
1. | \(20~\Omega\) | 2. | \(4.8~\Omega\) |
3. | \(10~\Omega\) | 4. | \(5~\Omega\) |
A satellite is revolving in a circular orbit at a height \(h\) from the earth's surface (radius of earth \(R\); \(h<<R\)). The minimum increase in its orbital velocity required, so that the satellite could escape from the earth's gravitational field is close to: (Neglect the effect of the atmosphere.)
1. \(\sqrt{2gR}\)
2. \(\sqrt{gR}\)
3. \(\sqrt{\frac{gR}{2}}\)
4. \(\sqrt{gR}\left(\sqrt{2}-1\right)\)
An object moves at a constant speed along a circular path in a horizontal \(XY\) plane with its centre at the origin. When the object is at \(x=-2~\text{m}\), its velocity is \(-(4~\text{m/s})\hat j\). What is the object's acceleration when it is at \(y = 2~\text{m}\)?
1. \(-(8~\text{m/s}^2)\hat j\)
2. \(-(8~\text{m/s}^2)\hat i\)
3. \(-(4~\text{m/s}^2)\hat j\)
4. \(-(4~\text{m/s}^2)\hat i\)
1. | the angle of the prism |
2. | the shape of the prism |
3. | refractive index of the prism |
4. | height of prism |
1. | It will continue in its position |
2. | It will move up |
3. | It will move down |
4. | It will execute vertical oscillations |
1. | \(100 g~\text{N}\) | 2. | zero |
3. | \(100\sqrt{2}g~\text{N}\) | 4. | \(\frac{100}{\sqrt{2}}g~\text{N}\) |
1. | takes place |
2. | does not take place |
3. | may or may not take place |
4. | depends on frequency |