The layers in the walls of the microsporangium that helps in the dehiscence of anther to release the pollen include:
I. | Epidermis |
II. | Endothecium |
III. | Middle layers |
IV. | Tapetum |
1. | I and II only | 2. | I, II, and III only |
3. | II and III only | 4. | I, II, III, and IV |
Which of the following is the last step in the process of embryogenesis?
1. Attachment of spermatozoa on the surface of the corona radiate.
2. Conversion of the primary oocyte into the secondary oocyte.
3. Sperm penetration through the zona pellucida.
4. Formation of ootid.
During fertilization spermatoza does not pass through
1. Birth canal.
2. Uterine tube.
3. Infundibulum of fallopian tube.
4. Isthmus of fallopian tube.
Mark the wrong statement for uterus?
1. The shape of it like an inverted pear.
2. It is supported by a ligament attached to the pelvic wall.
3. Its inner layer is the endometrium contains a thick layer of smooth muscle.
4. It is connected to the vagina through the cervical canal.
Which the following male and female structures are
least alike in function?
1. Vas deferens — oviduct.
2. Intestritial cells — Follicle cells.
3. Spermatogonia — oogonia.
4. Seminiferous tubule — vagina.
Each pole receives half the chromosome number of the
parent cell, is true for which stage?
1. Anaphase - II
2. Anaphase - I
3. Telophase-I
4. Telophase-II
Which of the following is not true for three domain
system?
1. Divides kingdom monera into two domains.
2. Third domain includes all eukaryotic organisms.
3. It resulted in six kingdom classifications.
4. It is not phylogenetic.
Archaebacteria differ from other bacteria on the
basis of
1. Cell membrane structure.
2. Cell wall structure.
3. Presence of vacuole.
4. flagella structure.
In case of protists sexual reproduction can be by
1. Cell fusion
2. Zygote formation
3. Triple fusion
4. Both 1 and 2
Cylindrical meristem is term used for?
1. Lateral meristem.
2. Promeristem.
3. Intercalary meristem.
4. Primary meristem.
Industrial melanism cannot be explained by
A. Natural selection theory
B. Mechanism of directional selection
C. Mechanism of genetic drift
D. Mechanism of founder's effect
E. Mechanism of progressive selection
1. A, C, D and E
2. A and D only
3. C and D only
4. D and E only
Pills are very effective with lesser side effects and are well accepted by the females. They prevent conception by following means
1. Inhibit ovulation
2. Inhibit implantation
3. After quality of cervix mucus to prevent/retard entry of sperms
4. All of these
Which of the following enzyme is involved in the
isolation of genetic material like DNA from a plant cell?
I. Cellulase II. Lysozyme
III. Ribonuclease IV. Protease
1. I, II, III and IV
2. I and II only
3. I only
4. I, III and IV
Similarity between microinjection and biolistic gene
gun method is
1. Used to transform the plant host cells.
2. Used to transform the animal host cells.
3. Recombinant DNA is directly injected into
host cells.
4. Used to transform the bacterial host cells
High aspartic acid, low nitrogen, and sugar content led to provide resistance against
1. Shoot borers in Okra
2. Jassids in Flat bean
3. Aphids in rapeseed
4. Stem borers in maize
Find incorrect statement/s with respect to sewage treatment
(a) Primary treatment involves filtration and sedimentation of activated sludge
(b) ‘Flocs’ refers to masses of aerobic bacteria associated with fungal filaments to form mesh like structures
(c) Aerobic treatment continues till the BOD is reduced
(d) Aerobic bacteria kill other kind of bacteria and fungi present in the activated sludge
1. (b) & (d)
2. (a) & (c)
3. (b) & (c)
4. (a) & (d)
Scala vestibuli and scala tympani are linked with the middle ear at:
1. Oval window and round window, respectively
2. Round window and oval window, respectively
3. Oval window
4. Round window
Which of the following is incorrect with respect to parathyroid hormone (PTH)?
1. Secretion of PTH is regulated by circulating levels of calcium ions.
2. PTH acts on bones and stimulates the process of bone mineralisation.
3. PTH stimulates the reabsorption of Ca+2 by renal tubules.
4. PTH increases the absorption of Ca+2 from digested food.
ECG is a graphical representation of the electrical activity of the heart during a cardiac cycle in which the end of the T-wave marks:
1. End of ventricular systole
2. End of ventricular diastole
3. Beginning of ventricular systole
4. Both 2 & 3
Select incorrect statement with respect to logistic growth curve
1. Found in stable type of population
2. Lag phase is followed by exponential phase
3. A crash phase occurs at the end of growth
4. Population seldom grows beyond the carrying capacity of the area
Which of the following is not a characteristic of climax community in ecological succession?
1. It is seldom replaced
2. Members are adapted to mesic conditions
3. Nutrient conservation is low
4. Members are both large sized and small sized
Who made huts, used skin of animals and barks of trees as clothes and started burial ceremony for the first time?
1. Homohabilis
2. Java man
3. Neanderthal man
4. Cro-magnon man
When more than one adaptive radiations takes place in an isolated geographical area, one can call this
1. Divergent evolution
2. Convergent evolution
3. Parallel evolution
4. Co-evolution
A person with Down syndrome will show all the given
symptoms except
1. Many loops on finger tips.
2. Flat back of head
3. Big and wrinkled tongue
4. Narrow round face
Which of the following are the functions of
deoxyribonucleoside triphosphates?
i. Act as substrates
ii. Provide energy for polymerization reaction
iii. Act as enzyme
iv. To separate strands of DNA
1. i, ii, iii
2. ii, iv
3. i, ii
4. i, iii
The Government of India in 1980s has introduced the
concept JFM to :-
1. Work closely with the local communities for
protecting and managing forests.
2. To control the emission of ozone depleting
substances.
3. To take appropriate measures for conservation of
biodiversity and sustainable utilisation of its
benefits.
4. To convert forest to agricultural land so as to feed
the growing human population.
Consider the statements regarding Mendel’s work.
Find out the incorrect option.
1. Mendel selected 14 true-breeding pea plant
varieties, as pairs which were similar except for
one character with contrasting traits.
2. To determine the genotype of a tall plant at F2,
Mendel crossed the tall plant from F2
with a dwarf plant. This he called a test cross.
3. Mendel proposed that something was being stably
passed down, unchanged, from parent to offspring
through the gametes, over successive
generations. He called these things as ‘factors’.
4. Based on his observations on monohybrid crosses
Mendel proposed three general rules to
consolidate his understanding of inheritance in
monohybrid crosses.
Production of a human protein in bacteria by genetic engineering is possible because
1. Bacterial cell can carry out the RNA splicing.
2. The mechanism of gene regulation is identical in humans and bacteria.
3. The human chromosome can replicate in bacterium cell.
4. The genetic code is universal
Which of the following is not a hereditary disease?
1. Haemophilia.
2. Cretinism.
3. Cystic fibrosis.
4. Thalassemia.
Which of the following pairs of features is good example of polygenic inheritance.
1. Human height and skin colour.
2. ABO blood group in humans and flower colour in Mirabilis jalapa.
3. Hair pigmentation and tongue rolling in humans.
4. Human eye colour and sickle cell anaemia.
Which one of the following is not a function of cytokinin?
1. Delay in senescence
2. Breaking of seed dormancy
3. Promoting bud dormancy
4. Promoting stomatal opening.
The diagram below is a diagrammatic representation showing
1. Section of a centriole
2. A cartwheel 9 + 0 structure of microtubular organisation
3. Internal structure of an eukaryotic flagella
4. Internal structure of a centrosome
Fibrous thickenings of hygroscopic nature are found in this part of the anther
1. Epidermis
2. Endothecium
3. Middle layer
4. Tapetum.
Secondary growth in roots is different from stem in
1. Absence of cork cambium
2. Absence of medullary rays
3. Developing completely secondary vascular cambium
4. Absence of vascular cambium
Vivipary in plants means
1. Development of fruit after the fertilised seed is buried in the soil
2. Germination of seeds in crevices of the stem where some soil is deposited
3. Germination of seeds while inside the fruit when it is still on the parent tree
4. Organisation of several seeds
Which one of the following biomolecules is correctly characterized?
1. Lecithin – a phosphorylated glyceride found in cell membrane
2. Palmitic acid – an unsaturated fatty acid with 18 carbon atoms
3. Adenylic acid – adenosine with a glucose and phosphate molecule
4. Alanine amino acid – contains an amino group and an acidic group anywhere in the molecule
A red blood cell, entering the right side of the heart passes by or through the following structures –
(1) | Atrioventricular valves | (2) | Semi-lunar valves |
(3) | Right atrium | (4) | Right ventricle |
(5) | SAN |
1. 23145
2. 31524
3. 35124
4. 53142
Go through the above sectional view of Cochlea. Identify A to E
Options: | A | B | C | D | |
1. | Scala vestibule | Scala media | Scala tympani | Basilar membrane | Reissner’s membrane |
2. | Scala media | Scala vestibule | Scala tympani | Basilar membrane | Reissner’s membrane |
3. | Scala tympani | Scala media | Scala vestibule | Basilar membrane | Reissner’s membrane |
4. | Scala vestibule | Scala media | Scala tympani | Reissner’s membrane | Basilar membrane |
A person is injected with gamma-globulin against Snake venom. This is
1. Artificially acquired active immunity
2. Artificially acquired passive immunity
3. Naturally acquired active immunity
4. Naturally acquired passive immunity
In which cells of the patient, the functional ADA gene is introduced as a part of the treatment of SCID?
1. Erythrocytes
2. Lymphocytes
3. Platelets
4. Liver cells
Which of the following statement is correct?
1. The RNA is subjected to a process called splicing where the exons are removed
2. In capping an unusual nucleotide is added to the 3 ends of the RNA
3. Splicing represents the dominance of the DNA world
4. In trailing, adenylate residues are added in a template-independent manner
By digestion and pulverization detritus get fragmented. This fragmentation step of decomposition helps in
1. Increasing porosity of detritus
2. The increased surface area of detritus
3. The increasing rate of sedimentation
4. All the above
Which one plant factor affects the photosynthesis process?
1. Concentration
2. Light
3. Availability of water in the soil
4. Amount of chlorophyll
The fate of pyruvic acid during Aerobic respiration is
1. Lactic acid fermentation
2. Alcoholic fermentation
3. Oxidative decarboxylation
4. Photophosphorylation
Alien species invasion is one of the causes of Biodiversity loss. Introduction of Nile perch in victoria lake leads to the extinction of more than 200 species of-
1. Cichlid fish
2. Gambusia
3. Salmon fish
4. Catfish
Which of following stage of plasmodium is formed in mosquito:-
1. Sporozoite
2. Gametes
3. Both (1) and (2)
4. Gametocytes
Exploring molecular, genetic and species-level diversity for products of economic importance is known as -
1. Biomining
2. Biomedicining
3. Biofortification
4. Bioprospecting
Myosin filaments are:-
1. thin filament
2. found only in I band
3. absent from H zone
4. attached to M line
Which of the following statement are correct:-
1. Lysosome contain a hydrolytic enzyme which acts in pH= 5
2. Glycosylation complete in the Golgi body.
3. Mitochondria are stained with vital stain Janus green B.
4. All of the above.
'Sacred groves are also one of the important means of Biodiversity conservation. In respect of this find out the odd one-
1. Khasi & Jaintia - Meghalaya
2. Aravalli hills - Rajasthan
3. Sarguja, Chanda, Bastar - Mizoram
4. Western Ghat - Maharashtra
Which of the statement is not true for given structures?
1. They both are made up of nucleoprotein
2. They both infect plants and bacteria
3. They are obligate intracellular parasites
4. A and B have RNA & DNA as genetics material respectively
How many of the following statements are correct?
i. Axillary buds are present in axil of leaflets
ii. In salvia filaments of stamens are of the same length
iii. The apocarpous condition can be seen in lotus and rose
iv. Endospermous seeds can be seen in Solanaceae
v. Sterile stamens are called staminodes
1. Three
2. Four
3. Two
4. One
Which is not correctly matched?
1. Malpighian tubules - Cockroaches, Mosquito
2. Antennal glands - Planaria, Crab
3. Nephridia - Earthworm
4. Protonephridia - Amphioxus
The gametophytic phase and sporophytic phases are independent in:-
1. Pinus
2. Polytrichum
3. Dryopteris
4. Chara
Bacterial colonies that have a foreign DNA fragment inserted into the plasmid will appear white because-
1. X-gal can be cleaved by -galactosidase
2. Lac-Z gene shows insertional inactivation due to insertion of foreign DNA
3. Lac-Z gene is active
4. X-gal can be cleaved by permease
Match column-I with column-II and select the correct option from the codes given below:-
Column - I | Column - II | ||
A | Parietal | i |
Dianthus |
B | Axile | ii | Helianthus |
C | Basal | iii | Argemone |
D | Free central | iv | Hibiscus |
1. A-iii, B-i, C-ii, D-iv
2. A-iii, B-iv, C-ii, D-i
3. A-ii, B-iv, C-iii, D-i
4. A-iv, B-iii, C-i, D-ii
Which one is the supportive framework of epithelium?
1. Tendon
2. Ligament
3. Areolar tissue
4. Nervous tissue and blood
Which of the following is not the function of the large intestine?
1. Absorption of some water, minerals and certain drugs
2. Nutrient absorption
3. Secretion of mucus to lubricate feces
4. The temporary storage of feces in rectum
When both ovaries of human females removed then which hormone will decrease in blood?
1. Oxytocin
2. Estrogen
3. Prolactin
4. Gonadotropin hormone
Which of the following is wrongly matched in the given table?
i | Golden rice | Transgenic rice | Vitamin A enriched |
ii | Flavr savr | Transgenic tobacco | Delayed ripening |
iii | Bt-cotton | Transgenic cotton | Bacterial and viral resistance |
iv | Rosie | Transgenic cow | Milk contained human alpha lactalbumin |
1. i and ii
2. ii, iii, and iv
3. Only ii and iii
4. Only iii
In rocky intertidal communities removal of which of the following predator became the cause of the destruction of 10 species of invertebrates
1. Monarch butterfly
2. Starfish pisaster
3. Paramecium Aurelia
4. Abingdon tortoise
Which of the following are the character of Liliaceae family?
i. Monocotyledonous plants
ii. Umbellate clusters
iii. Axile placentation
iv.
v. Ovary inferior
1. i, ii, & iii
2. i, ii, iii & iv
3. iv & v
4. iii & v
Match the items given in column-I with those given in column-II and select the correct option:-
Column - I | Column - II | ||
A | I |
Nitrate reductase |
|
B | II | RuBisCO, PEPCase | |
C | Mo | III | Alcohol dehydrogenase |
1. A-II, B-III, C-I
2. A-III, B-II, C-I
3. A-I, B-III, C-II
4. A-II, B-I, C-III
Mark the incorrectly matched pair regarding the structure with its location and functions:-
1. | Otolith organs | Located in the utriculus and sacculus, and is related to static equilibrium |
2. | Organ of Corti | Located on the basilar membrane and contains hair cells that act as auditory receptors |
3. | Visual cortex area | Located on the temporal lobe where sight impulses are analyzed and the retinal image is recognised. |
4. | Ear ossicles | Located in the middle ear cavity and increase the efficiency of transmission of sound waves to the inner ear. |
Find an incorrect statement with respect to results of HGP:-
1. Dystrophin protein gene is the largest gene of the human genome
2. Chromosome Y has minimum of 231 genes
3. SNPs have been identified at about 1.4 million locations
4. The functions are unknown for over 90% of discovered genes.
Regarding competition find out the wrong statement
1. Unrelates species could compete for the same resource
2. In competition fitness of one species is lowered in presence of other species
3. Abingdon tortoise became extinct due to competitor starfish
4. Balanus led to exclusion of Chathamalus from rocky coasts of Scotland
Interspecific hybridization is the mating of
1. superior males and females of different breeds.
2. two different related species
3. animals within the same breed without having common ancestors
4. more closely related individuals within the same breed for 4-6 generations
Annelids do not represent:-
1. Circumpharyngeal nerve ring
2. Longitudinal muscles in the gut
3. Metameric segmentation
4. Mesodermal pouches in body cavity
Ground Tissue does not include:-
i. Epidermis
ii. Vascular bundles
iii. Parenchyma
iv. Collenchyma
v. Sclerenchyma
1. i & ii
2. iv & v
3. i & iii
4. ii & v
Morphology of chromosomes and shape of chromatid is best observed at:-
1. Metaphase, Anaphase
2. Prophase, Metaphase
3. Anaphase, Telophase
4. Only telophase
Select the correctly match pair:-
1. Zinc - Helps to maintain the ribosome structure
2. Magnesium - Needed during the formation of mitotic spindles
3. Calcium - plays a role in opening and closing stomata
4. Manganese - Needed for splitting of water during photosynthesis
The hormone that reduces the destruction of bones also enhances the deposition of in bones thus making them solid and strong. This hormone is:-
1. Collips hormone
2. Thyrocalcitonin
3. Thyroxine
4. Vasopressin
Which of the following is not true for generation of dihybrid cross -
1. 9-phenotypic categories, 4 genotypic categories
2. 9-genotypic categories, 16 zygotic combination
3. 62.5% parental combination, 37.5% new combination
4. 4-types male gametes, 4 type female gemate
In meselson and Stahl's experiment, the E.coli cell with heavy DNA is continuously grown for three generations in containing medium. The ratio of containing DNA in the third generation would be-
1. 2 : 2 : 4
2. 0 : 1 : 3
3. 0 : 1 : 7
4. 7 : 1 : 0
The components of the ecosystem are seen to function as a unit when we consider which of the following aspect
1. Productivity and decomposition
2. Decomposition and energy flow
3. Productivity and energy flow
4. Productivity, decomposition, energy flow and nutrient cycling
Pseudocoelom is not found in:-
1. Enterobius
2. Ancylostoma
3. Echinococcus
4. Wuchereria
Which one option is correct for Dark reactions?
1. Occurs in dark
2. Not depend on light
3. Dependent on products of light reaction
4. Occurs in lumen in thylakoid
Which one of the following statements is incorrect with respect to the transport of carbon dioxide in blood?
1. About 20-25 percent of carbon dioxide is carried by haemoglobin in the form of carbaminohaemoglobin.
2. 70 percent of is carried in a dissolved state through plasma.
3. As the blood picks up carbon dioxide from tissue, accumulates inside RBCs of which some move out into the blood plasma and in exchange chloride ions move from plasma into RBCs.
4. The greatest percentage of carbon dioxide is transported in blood plasma as bicarbonate ions.
The most important primary factor in determining the percent saturation of haemoglobin with oxygen is
1. Partial pressure of oxygen
2. Acidity
3. Partial pressure of carbon dioxide
4. Temperature
Analysis of urine helps in clinical diagnosis of many metabolic disorder as well as malfunctioning of kidney. Given below are some disorders
a. Glycosuria b. Ketonuria
c. Haematuria d. Proteinuria
Choose the correct option which indicates disorders of diabetes mellitus if not controlled?
1. a only
2. a & b only
3. a,b & c only
4. a,b,c & d
Select the correct statement with respect to gemmae
a. These are specialised reproductive structures in members of thallophytes and bryophytes
b. These are green, unicellular & asexual buds
c. These are formed in small receptacles located on thalli
d. Single gemma forms two new individuals after germination
e. These are chlorophyllous and multicellular structures
f. They germinate and make monoecious thallus of Marchantia
1. a,d,e and f
2. b,c,d and f
3. c,d and e
4. b,c and f
Read the following statements carefully and select the correct
a. Tapetum cells possess dense cytoplasm and generally have more than one nucleus
b. Sporopollenin is absent in the areas called germ pore
c. Generative cell is small, spindle shaped with a irregularly shaped nuclei
d. Spindle of first mitosis in pollen is asymmetric
1. a,b,c & d
2. a,b & c
3. a,c & d
4. a,b & d
Choose the correct sequence of greenhouse gases with respect to their relative contribution to global warming in increasing order
1.
2.
3.
4.
'Ozone depletion' means thinning of ozone layer during spring season and
1. This will allow UV-A to enter stratosphere which will cause snow blindness
2. This is caused by as major pollutant
3. Ozone is released during this as or ClO
4. First large hole was discovered over north pole
Match the following micro-organisms to the related products
Column - I Column - II
a. Swiss cheese (i) Monascus
b. Statin (ii) Propionibacterium
c. Butyric acid (iii) Trichoderma
d. Cyclosporin A (iv) Clostridium
1. a(ii), b(i), c(iv), d(iii)
2. a(ii), b(i), c(iii), d(iv)
3. a(ii), b(iv), c(i), d(iii)
4. a(iii), b(i), c(ii), d(iv)
Statins produced by the yeast Monascus purpureus have have been commercialised as
1. Immunosuppressive agent
2. Blood-cholesterol lowering agent
3. Clot buster
4. Agents to increase immunity
Which of the following statement is correct ?
1. | Alcoholic fermentation by yeast and conversion of alcohol to acetic acid both are aerobic processes |
2. | Alcoholic fermentation is aerobic and conversion of alcohol to acetic acid is anaerobic one |
3. | Alcoholic fermentation by yeast is anaerobic and conversion of alcohol to acetic acid is aerobic one |
4. | Alcoholic fermentation by yeast and conversion of alcohol to acetic acid both are anaerobic processes |
During micturition , the contraction of detrusor muscles of urinary bladder is under the control of
1. Sympathetic nerve
2. Parasympathetic nerve
3. Pudendal nerve upon stimulation
4. Pudendal nerve upon inhibition
Given below is a diagrammatic representation of ribs and ribcage
Identify the structure labelled as 'A' and choose the correct option with respect to its number in human body
1. 7 in number (cervical vertebrae)
2. 12 in number (lumbar vertebrae)
3. 5 in number (sacral vertebrae)
4. 12 in number (thoracic vertebrae)
The part of gut of the cockroach in which armarium and stomodeal valves are present in
1. Crop
2. Hepatic caeca
3. Gizzard
4. Ileum
The IUPAC name of the above mentioned compound is -
1. 1,2,3-Tricyanopropane
2. Propane-1,2,3-tricarbonitrile
3. 1,2,3-Cyanopropane
4. Propane Tricarbylamine
How many stereoisomers does this molecule have?
CH3CH=CHCH2CHBrCH3
1. 4
2. 6
3. 8
4. 2
The above reduction can be best carried out by:
1. Clemmensen reduction
2. Wolff-Kishner reduction
3.
4. None of these
A combination of nitrocellulose and nitroglycerine is a propellant of the type:
1. Hybrid propellant.
2. Mono propellant.
3. Double based propellant.
4. Biliquid propellant.
A solution containing 3.3 g of a substance in 125 g of benzene (b.p. 80°C) boils at 80.66°C. If Kb for one litre of benzene is 3.28°C, the molecular weight of the substance shall be
1. 127.20
2. 131.20
3. 137.12
4. 142.72
At identical temperature and pressure, the rate of diffusion of hydrogen gas is times that of a hydrocarbon having molecular formula . What is the value of n?
1. 1
2. 4
3. 3
4. 8
For one mole of van der Waal's gas when b=0 and T=300 K, the PV vs. 1/V plot is shown below.
The value of the van der Waal's constant 'a' (atm. ) is-
1. 1.0
2. 4.5
3. 1.5
4. 3.0
The quantity that does not change for a sample of a gas in a sealed tight container when it is cooled from at constant volume is-
1. Average energy of the molecule
2. Pressure of the gas
3. Density of the gas
4. Average speed of the molecules
The maximum entropy of mixing occurs when hexane and heptane are mixed respectively in the proportion of -
1. 8.6 g and 10.0 g
2. 8.6 g and 8.6 g
3. 10.0 g and 8.6 g
4. 10.0 g and 10.0 g
Given the reaction:
+
Which of the following statements is correct?
1. (b) has a lesser stability
2. (b) is more volatile than (a)
3. (a) is more volatile than (b)
4. (a) forms higher yields at a lower temperature
Which of the following will undergo Cannizzaro reaction?
1. 2.
3. 4.
The product in the below mentioned reaction is
1. | 2. | ||
3. | 4. |
An organic compound (A) of the molecular formula gives a positive Iodoform test but does not reduce Tollen's reagent. When (A) is subjected to acid-catalyzed hydrolysis, another compound B is formed which gives positive Tollen's test. Identify the unknown compound (A).
1.
2.
3.
4.
If =82 kJ/mol. Bond energy of NN. N=N, O=O and N=O bonds is 946, 418, 498 and 607 kJ/mol respectively. Then the resonance energy of will be
1.
2.
3.
4.
In a process, n-propyl chloride Is reacted with sodium butanoate in an aqueous medium. Alter the reaction diethyl ether is added and the solution Is shaken. The two layers are separated. The Incorrect statement with respect to this procedure
1. The reaction gives a solid product which precipitates in the aqueous solution.
2. The reaction takes place in the aqueous medium.
3. The product Is extracted in diethyl ether and the organic layer forms the upper layer.
4. The salt formed in the reaction remains In aqueous medium.
The correct order of the leaving group ability is:
1. \(\text{ OCOC}_2\text{H}_5~\)>\(\text{OC}_2\text{H}_5\) >\(\text {OSO}_2\text{Me}\) > \(\text {OSO}_2\text{CF}_3\)
2. \(\text{OC}_2\text{H}_5\) > \(\text{ OCOC}_2\text{H}_5~\)> \(\text {OSO}_2\text{CF}_3\) > \(\text {OSO}_2\text{Me}\)
3. \(\text {OSO}_2\text{CF}_3\) > \(\text {OSO}_2\text{Me}\) > \(\text{ OCOC}_2\text{H}_5~\) > \(\text{OC}_2\text{H}_5\)
4. \(\text{ OCOC}_2\text{H}_5~\)>\(\text {OSO}_2\text{CF}_3\) > \(\text{OC}_2\text{H}_5\) > \(\text {OSO}_2\text{Me}\)
1. Br2/KOH, H2/Pt, CH3COOH
2. P2O5/heat, H2/Pt, (CH3CO2)2O
3. (CH3CO)2O, H2/Pt, Br2/KOH
4. Br2/KOH, CH3COCl
The reaction of cyclohexanone with dimethylamine in the presence of the catalytic amount of an acid forms a compound, is generally known as
1. A Schiff s base
2. An enamine
3. An imine
4. An amine
The oxidation number of S in is:
1. +2
2. +4
3. +6
4. +7
If —D—glucose is dissolved in water and kept for a few hours, the major constituent(s) present in the solution is/are:
1. | α —D—glucose. |
2. | The mixture of ß—D-glucose and open-chain D-glucose. |
3. | Open chain D-glucose. |
4. | The mixture of α —D—glucose and ß—D-glucose. |
A bottle of solution contains 70% (w/w) acid. If the density of the solution is 1.54 g , the volume of the solution required to prepare 1 L of 1 N solution is
1. 90mL
2. 45 mL
3. 30 mL
4. 23 mL
The wavelength of the spectral line obtained in the spectrum of
when the transition takes place between levels whose sum is 4 and the difference is 2, will be:
1. 11.4 x cm
2. 1.14 x cm
3. 0.114 x cm
4. 1.14 x cm
The structure of the monomer used for the preparation of plexiglass is
1.
2.
3.
4.
In a subshell, if the number of radial nodes is two times the number of angular nodes, then the minimum possible value of the principal quantum number (n) is:
[angular nodes are non-zero)
1. | 1 | 2. | 2 |
3. | 3 | 4. | 4 |
major product is
1.
2.
3.
4.
Which of the following statements is correct?
a. | [Ni(H2O)6]2+ and [Ni(NH3)6]2+ have the different values of CFSE. |
b. | [Ni(H2O)6]2+ and [Ni(NH3)6]2+ have the same value of the magnetic moment |
c. | [Ni(H2O)6]2+ and [Ni(NH3)6]2+ have the same hybridization of nickel |
1. a & c only
2. b & c only
3. a & b only
4. All of these
All group-2 metals dissolve in liquid ammonia to produce a bright blue colour. The colour is due to
1. A change in the structure of ammonia
2. d-d transition
3. The spectrum of the solvate electrons
4. An electronic transition from a lower to a higher energy state
The ignition mixture in the aluminothermic process contains
1. Mg powder and BaO2
2. Mg powder, Al and BaO2
3. Mg and Al powder
4. Mg and Al oxide
When excess of KCN is added to a solution of CuSO4, the final product obtained is,
1. K2[Cu(CN)4]
2. K3[Cu(CN)4]
3. CuCN
4. K[Cu(CN)2]
Given lanthanoid ions ,the tendency to form the complexes is highest for:
1. Ce+3
2. Pm+2
3. Lu+3
4. Eu+2
The fusion of chromite ore (FeCr2O4) with Na2CO3 in air gives a yellow solution upon the addition of water. Subsequent treatment with H2SO4 produces an orange solution.
The yellow and orange colours, respectively, are due to the formation of:
1. Na2CrO4 and Na2Cr2O7
2. Cr(OH)3 and Na2Cr2O7
3. Cr2(CO3)3 and Fe2(SO4)3
4. Cr(OH)3 and Na2CrO4
Which of the following weighs less when weighed in magnetic field?
1. ScCl3
2. FeCl3
3. TiCl3
4. VCl3
The density and Eq. wt. of metal are 10.5 g and 100, respectively. The time required for a current of 3 amp to deposit a 0.005 mm thick layer of the same metal on an area of 80 is closest to
1. 120 s
2. 135 s
3. 67.5 s
4. 270 s
The equilibrium constant of a 2 electron redox reaction at 298 K is 3.8 x . The cell potential Eo (in V) and the free energy change ∆Go (in kJ mol-1 ) for this equilibrium respectively, are -
1. | -0.071, -13.8 | 2. | -0.071, 13.8 |
3. | 0.71, -13.8 | 4. | 0.071, -13.8 |
Consider the following Galvanic cell.
By what value the cell voltage change when concentration of ions in anodic and cathodic compartments both increased by a factor of 10 at 298
1. +0.0591
2. -0.0591
3. -0.1182
4. 0
The limiting molar conductivities at infinite dilution and are 239,125 and 128 S cm2/mole respectively. If a 0.1 M solution of has a molar conductivity of . The degree of dissociation is
1. 0.024
2. 0.24
3. 0.10
4. 0.05
The standard reduction potential for is 0.34 V.
The reduction potential at pH =14 for the above couple given is :
1. -0.22 V
2. +0.22 V
3. -0.34 V
4. +0.34 V
Calcium carbide with heavy water generates-
1.
2.
3.
4.
reacts with aqueous to give and Nal. The products of the reaction of Cl2 with aqueous are
1. + NaCl
2. + HCl
3. + HCl
4. + NaCl
The 'S' atom among the following that does not have \(\mathrm{sp}^3\) hybridization is
1. | \(\mathrm{SO}^{2-}_4\) | 2. | \(\mathrm{SF}_4\) |
3. | \(\mathrm{SF}_2\) | 4. | \(\mathrm{S}_8\) |
The chemical formula of 'laughing gas' is
1. NO
2.
3.
4.
A colloid of Agl is formed by mixing AgNO3 with an excess of Kl. The electrolyte with the greatest coagulation value for it is:
1.
2. NaCl
3.
4.
In which series are the species listed in order of increasing size?
1. N, O, F
2. Na, Mg, K
3. Cr, Cr2+, Cr3+
4. Cl, Cl-, S2-
Which element from multiple bonds with itself and with carbon and oxygen?
1. P, As
2. N, As
3. N, P
4. N
A swimmer swims a distance d upstream in 4 s and swims an equal distance downstream in 2 s. The ratio of swimmer's speed in still water to the speed of river water will be
1. | \(\frac{6}{5} \) | 2. | \(\frac{3}{1} \) |
3. | \(\frac{5}{3} \) | 4. | \(\frac{4}{3}\) |
A small coin is kept at a distance r from the centre of a gramophone disc rotating at an angular speed . The minimum coefficient of friction for which a coin will not slip is:
1.
2.
3.
4.
A particle has been thrown up with double the escape speed from the surface of the earth. Its speed when it reaches interstellar space far away from the Earth's gravity is
1.
2.
3.
4. Zero
If \(\mathrm{E}\) is the energy stored per unit volume in a wire having \(\mathrm{Y}\) as Young's modulus of the material, then the stress applied is:
1.
2.
3.
4.
Water is filled in a container up to height h. A narrow hole is made at the bottom. The velocity with which water will come out through-hole is proportional to-
1.
2.
3.
4.
The motion of the particle is started at t = 0 and the equation of motion is given by x = 8 sin, where x is in cm and t is in seconds. When will the particle come to rest for the first time?
1.
2.
3.
4.
A policeman buzzes a whistle of frequency 420 Hz. A car with an audio recorder is moving towards the policeman with a speed of 72 km/h, recording a frequency of . If, after crossing, it records the frequency of , then - is: (Velocity of sound is 300 m/s)
1. Hz
2. 20 Hz
3. 28 Hz
4. 56 Hz
In the P-V graph shown for an ideal diatomic gas, the change in the internal energy is:
1. \(\frac{3}{2}P(V_2-V_1)\)
2. \(\frac{5}{2}P(V_2-V_1)\)
3. \(\frac{3}{2}P(V_1-V_2)\)
4. \(\frac{7}{2}P(V_1-V_2)\)
A stationary nucleus of mass number A emits an \(\alpha-\text{particle}\). If the de-Broglie wavelength of the daughter nucleus is \(\left(\lambda\right)_{1}\) and that of the \(\alpha\)-particle is \(\left(\lambda\right)_{2}\), then the ratio \(\frac{\left(\lambda\right)_{1}}{\left(\lambda\right)_{2}}\) is:
1. | \(\frac{4}{A - 4}\) | 2. | \(\frac{A - 4}{4}\) |
3. | 1 | 4. | \(\frac{A + 4}{4}\) |
Two nuclei fuse together to form a single nucleus as . If binding energy per nucleon of A and B are respectively x and y, then the energy released in the process is:
1. | 4x + 4y | 2. | 4x - 4y |
3. | 4y - 4x | 4. | y - x |
Let be the maximum frequency of Lyman series, be the frequency of the first line of Lyman series and be the frequency of the series limit of the Balmer series. Then which of the following is correct?
1.
2.
3.
4.
In a YDSE, let X and Y be the upper and lower slits. A thin film of thickness t and refractive index is placed in front of X. Let = fringe width. The central maximum will shift
1. Downward
2. Upward
3. By
4. Both 2 & 3
In the given graph of the photoelectric experiment, the maximum energy of the emitted photoelectron will be:
1. | \(2\) eV | 2. | \(0\) eV |
3. | \(4\) eV | 4. | \(4\) J |
What is the equivalent resistance across the terminals of the battery, if the diodes are ideal?
1. 10Ω
2. 20 Ω
3. 15 Ω
4.
The velocity of a particle moving along a straight line with constant acceleration 'a' reduces to of its initial velocity in time . The total time taken by the body till its velocity becomes zero is:
1.
2.
3.
4.
A body is projected with velocity m/s. The time of flight of the body is: [considering x as horizontal and y as vertical axis and g is acceleration due to gravity]
1.
2.
3.
4.
Block A moves on a smooth surface and collides with block B at rest. The maximum energy stored in the spring will be:
1. | \(\frac{1}{8} m v^2 \) | 2. | \(\frac{1}{4} \mathrm{~m} v^2 \) |
3. | \(\frac{1}{3} m v^2 \) | 4. | \(\frac{1}{2} m v^2\) |
If work done by string on block A is W, shown in the given arrangement, then the work done by the string on block B is:
1. - W
2.
3.
4.
A particle of mass makes an elastic one-dimensional collision with another stationary particle of mass . The fraction of kinetic energy of carried away by is-
1.
2.
3.
4.
A solid is suspended from an independent support in a liquid placed on a weighing machine, due to which the weight of the liquid:
1. | Increases |
2. | Decreases |
3. | Remain unchanged |
4. | May increase or decrease |
The amplitude of a simple harmonic oscillator is \(A\) and speed at the mean position is \(v_0\) .The speed of the oscillator at the position \(x={A \over \sqrt{3}}\) will be:
1. | \(2v_0 \over \sqrt{3}\) | 2. | \(\sqrt{2}v_0 \over 3\) |
3. | \({2 \over 3}v_0\) | 4. | \(\sqrt{2}v_0 \over \sqrt{3}\) |
The fundamental frequency of an open organ pipe is 200 Hz. If one end of the pipe is closed, its fundamental frequency becomes:
1. | 100 Hz | 2. | 200 Hz |
3. | 50 Hz | 4. | 400 Hz |
Charged pollen grains are lying on a frictionless table. These are now subjected to certain field and are found to be moving by these fields. The field cannot be
1. Time dependent electric field
2. Position dependent electric field
3. Time dependent magnetic field
4. Position dependent magnetic field
The figure shows a parallel plate capacitor being charged by a battery. If X and Y are two closed curves then during charging, is zero along the curve:
1. | X only |
2. | Y only |
3. | Both X & Y |
4. | Neither X nor Y |
A capacitor and a resistor are connected in series across the a.c supply. Which of the following phasor diagrams may be correct?
1. | 2. | ||
3. | 4. |
For a dipole, q = 2 x 10–6 C and d = 0.01 m, if E = 5 x 105 N/C, then the maximum torque for this dipole is:-
1.
2.
3.
4.
A circuit has section AB as shown in figure. The emf of the cell is 10 V. The potential difference VAB= 5 V. The charge on the capacitor C1 is:
1. | 10 μC | 2. | 5 μC |
3. | 15 μC | 4. | Can't be determine |
In a square loop made with a wire of uniform cross-section current I enters from point A and leaves from point B. The magnetic field strength at the centre of the square is :-
1. Zero
2.
3.
4.
A ferromagnetic substance is placed in the varying magnetising field \(H.\) The magnetic induction \(B\) is measured for various values of direct and reverse magnetising fields. The following graph has been plotted for \(B\) versus \(H.\) Choose the wrong statement:
1. | there is a limit of direct and reverse external magnetising field at which the magnetisation and hence the magnetic induction saturates. |
2. | even after removing the external magnetising field some residual magnetisation called 'retentivity' is left over in the substance. |
3. | on increasing the reverse magnetising field, the magnetic field decreases to zero for a value of magnetising field which is known as 'susceptibility'. |
4. | on increasing the reverse magnetising field, the magnetic field decreases to zero for a value of magnetising field known as 'coercivity'. |
A mass m such that m=M is supported by a massless string wound round a uniform cylinder of mass M and radius R. On releasing the mass from rest, it will fall with acceleration:-
1. g
2.
3.
4.
If at a pressure of \(10^6\) dyne/cm2, one gram of nitrogen occupies \(2\times10^4\) c.c. volume, then the average energy of a nitrogen molecule in erg is:
1. | \(14\times10^{-13}\) | 2. | \(10\times10^{-12}\) |
3. | \(10^{6}\) | 4. | \(2\times10^{6}\) |
A mark on the surface of sphere (µ = 3/2) is viewed from a diametrically opposite position. It appears to be at a distance \(15~\mathrm{cm}\) from its actual position. The radius of sphere is:
1. 15 cm
2. 5 cm
3. 7.5 cm
4. 2.5 cm
In a transistor circuit shown here, the base current is \(35~\mu \)A . The value of the resistor\(R_{b}\) is:
(Given \(V_{BE}=4.5\) V)
1. \(128.5~\mathrm{k\Omega}\)
2. \(257~~\mathrm{k\Omega}\)
3. \(5~~\mathrm{k\Omega}\)
4. \(2.5~~\mathrm{k\Omega}\)
If the electric field at a point is along the south, the potential gradient is zero
1. along north
2. along south
3. along north-east
4. along east and west
What is the maximum value of 5sinθ – 12cosθ?
1. 12
2. 17
3. 7
4. 13
Two heating coils, one of fine wire and the other of thick wire of the same material and of the same length are connected in series and in parallel. Which of the following statements is correct?
1. In series, fine wire liberates more energy while in the parallel thick wire will liberate more energy
2. In series, fine wire liberates less energy while in the parallel thick wire will liberate more energy
3. Both will liberate equally
4. In series, the thick wire will liberate more energy while in parallel it will liberate less energy
An ammeter reads up to \(1\) A. Its internal resistance is \(0.81\) \(\Omega\). To increase the range to \(10\) A, the value of the required shunt is:
1. \(0.09~\Omega\)
2. \(0.03~\Omega\)
3. \(0.3~\Omega\)
4. \(0.9~\Omega\)
Consider six wires with the same current flowing through them as they enter or exit the page. Rank the magnetic field's line integral counterclockwise around each loop, going from most positive to most negative.
1. B > C > D > A
2. B > C = D > A
3. B > A > C = D
4. C > B = D > A
In the circuit diagram shown in figure, R = 10 \(\Omega\), L = 5 H, E = 20 V and i = 2 A. This current is decreasing at a rate of 1.0 A/s. at this instant will be:
1. | 40 V | 2. | 35 V |
3. | 30 V | 4. | 45 V |
Two loads ( ) are connected by a string passing over a fixed pulley. The center of gravity of loads are initially at the same height. Find the acceleration of the center of gravity of the system:
1. \(\left(\frac{(P_1-P_2)^{\frac{1}{2}}}{P_1+P_2}\right)\text{g}\)
2. \(\left(\frac{P_1-P_2}{P_1+P_2}\right)\text{g}\)
3. \(\left( \frac{P_1-P_2}{P_1+P_2}\right)^2 \text{g}\)
4. \(\left( \frac{P_1+P_2}{P_1-P_2}\right)\text{g}\)
A solid sphere of mass M, radius R, and having a moment of inertia about an axis passing through the center of mass as I, is recast into a disc of thickness t, whose moment of inertia about an axis passing through its edge and perpendicular to its plane remains I. Then, the radius of the disc will be:-
1.
2.
3.
4.
5 g of water at \(30^{\circ} \mathrm{C}\) and 5 g of ice at \(-20^{\circ} \mathrm{C}\) are mixed together in a calorimeter. The water equivalent of the calorimeter is negligible, and the specific heat and latent heat of ice are 0.5 \(\text{cal/g}^{\circ} \mathrm{C}\) and 80 \(\text{cal/g}\), respectively. The final temperature of the mixture is:
1. | \(0^{\circ} \mathrm{C}\) | 2. | \(-8^{\circ} \mathrm{C}\) |
3. | \(-4^{\circ} \mathrm{C}\) | 4. | \(2^{\circ} \mathrm{C}\) |
One mole of a gas is subjected to two processes AB and BC, one after the other, as shown in the figure. BC is represented by . We can conclude that:-
1.
2.
3.
4.
A beam of white light is incident on a hollow prism of glass as shown in the figure. Then:-
1. the light emerging from prism gives spectrum but the bending of all colors is away from the base
2. the light emerging from prism gives spectrum, all the colors bend towards the base, the violet
most and red least
3. the light emerging from prism gives spectrum, all the colors bend towards the base, the red the most and violet the least
4. the light emerging from prism gives no spectrum
The output in the circuit shown in the figure taken across a capacitor is:
1. | 2. | ||
3. | 4. |