datavorous/entrance-exam-dataset huggingface dataset:
Which of the following graph is correct for the enzyme catalysis?

Options:
A
B
C
D

The correct answer is:

Solution:
Rate of enzyme catalysis increases with temperature but it decreases above 45°C because above 45°C , denaturation of enzymes takes place hence curve in option C is correct.

Topic: Chemistry, Surface Chemistry, NEET
Which of the following graph is correct for zero order reaction?

Options:
A
B
C
D

The correct answer is:

Solution:
Here the correct option is D as rate of zero order reactions does not depend on the concentration of reactant.

Topic: Chemistry, Chemical Kinetics, NEET
Which of the following graph is correct representation between atomic number Z and magnetic moment of d -block elements? [Outer electronic configuration : (n− 1)d x   ns 1 or 3 ]

Options:
A
B
C
D

The correct answer is:

Solution:
Magnetic moment =n(n+2)BM
N : Number of unpaired e-
As atomic number increases in d-block element number of unpaired e- first increases upto middle then decreases.

Topic: Chemistry, d and f Block Elements, NEET
Which of the following graph represents the variation of amount of chemisorption of a gas by a solid with temperature under constant pressure?

Options:
A
B
C
D

The correct answer is:

Solution:
Chemisorption involves a chemical reaction between the surface and adsorbate, which first increases due to supply of energy of activation with temperature then decreases with cleavage of bonds.

Topic: Chemistry, Surface Chemistry, NEET
Which of the following graph represents the variation of resistivity ρ with temperature T for copper?

Options:
A

B

C

D

The correct answer is:

Solution:
For some metals like copper, resistivity is nearly proportional to temperature although a non linear region always exists at very low temperature.
Relation between resistivity and temperature is given by \(\rho=\rho_{\circ} e^{-a T}\)

Topic: Physics, Current Electricity, NEET, NEET 2020 (Phase 1)
Which of the following graphs best depicts the changes in one cycle of PCR?

Options:
A
B
C
D

The correct answer is:

Solution:
Polymerase chain reaction is an in vitro method of gene amplification. One cycle of PCR has three steps:
1. Heat denaturation in which DNA is heated at 90°C.
2. Annealing in which the two DNA strands bind to their respective primers at 55°C. Polymerisation in which the primer elongates at 72°C.

Topic: Biology, Biotechnology - Principles and Processes, NEET
Which of the following graphs correctly represents the relation between lnE and lnT, where E is the amount of radiation emitted per unit time from a unit area of the body and T is the absolute temperature?

Options:
A
B
C
D

The correct answer is:

Solution:
We know,
E=ÎµÏT4
âlnâ¡E=lnâ¡ÎµÏ+4lnâ¡T
ÎµÏ<1, hence, lnÎµÏ is negative.

Topic: Physics, Thermal Properties of Matter, NEET
Which of the following graphs correctly represents the variation of g on the Earth?

Options:
A
B
C
D

The correct answer is:

Solution:
The acceleration due to gravity on the surface of Earth,
g=GMR2
At a height h above the surface,
g=GMR+h2 =GMr2
At a depth below the surface, g=GMrR3

Topic: Physics, Gravitation, NEET
Which of the following graphs correctly represents the variation of particle momentum with associated de Broglie wavelength?

Options:
A
B
C
D

The correct answer is:

Solution:
λ=hp, there is inverse relation between de Broglie wavelength and momentum, hence the graph will be rectangular hyperbola.

Topic: Chemistry, Structure of Atom, NEET
Which of the following graphs depicts the effect of substrate concentration on velocity of enzyme catalysed reaction?

Options:
A

B

C

D

The correct answer is:

Solution:
Option (1) is the correct answer because with the increase in substrate concentration, the velocity of enzymatic reaction rises at first. The reaction ultimately reaches maximum velocity $\left(\mathrm{V}_{\max }\right)$ which is not exceeded by any further rise in concentration of the substrate. This is because the enzyme molecules are fewer than substrate molecules and after saturation of these molecules, there are no free enzyme molecules to bind the additional substrate molecules
Option (2) is incorrect as velocity of reaction is continuously increasing in the given graph.
In option (3) after reaching at $\mathrm{V}_{\text {max }}$, velocity declines while in option (4) velocity of reaction declines from high on increasing substrate concentration. So, option (3) and (4) are incorrect.

Topic: Biology, Biomolecules (B), NEET, NEET 2024 (Re-NEET)
Which of the following graphs represents a first order reaction?

Options:
A
B
C
D

The correct answer is:

Solution:
Rate =k[A]1 for first order reaction.
Thus, plot of the rate of reaction against the concentration of reactant will be the straight line passing through origin.

Topic: Chemistry, Chemical Kinetics, NEET
Which of the following graphs represents an exothermic reaction?

Options:
A
B
C
D

The correct answer is:

Solution:
According to van't Hoff equation
logK=-ÎHÂ°2.303RÃ1T+ÎSÂ°R
Y=M x+C
When log K is plotted against 1T , we get straight line having slope equal to -ÎHÂ°2.303R
For exothermic reaction, slope of the line will be positive.

Topic: Chemistry, Chemical Equilibrium, NEET
Which of the following graphs represents the behaviour of ideal binary liquid mixture?

Options:
A Plot of 1/Ptotal against yA is linear
B Plot of 1/Ptotal against yB is non-linear
C Plot of Ptotal against yA is linear
D Plot of Ptotal against yB is linar
(Here, yA and yB are the mole fraction of components A and B in vapour).

The correct answer is:
Plot of 1/Ptotal against yA is linear

Solution:
Ptotal×yA=PA
1Ptotal=yA×1PA
When 1Ptotal is plotted against yA , we get straight line passing through origin having slope of 1PA.

Topic: Chemistry, Solutions, NEET
Which of the following graphs represents the motion of a particle moving with constant velocity?

Options:
A graphs (i) and (iii)
B graphs (i) and (iv)
C graphs (i) and (ii)
D graph (i)

The correct answer is:
graphs (i) and (iv)

Solution:
For the graphs (i) and (iv), slope is constant, hence the velocity is constant.

Topic: Physics, Motion In One Dimension, NEET
Which of the following group 15 elements is the least metallic?

Options:
A Nitrogen
B Phosphorus
C Arsenic
D Antimony

The correct answer is:
Nitrogen

Solution:
The paragraph states that there is a transition from non-metallic

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following group 15 elements is the most metallic?

Options:
A Nitrogen
B Phosphorus
C Arsenic
D Antimony

The correct answer is:
Antimony

Solution:
The paragraph states that there is a transition from non-metallic to metallic through metalloid character as we move down the group 15. Bismuth is the most metallic element in the group because it is the heaviest element and has the largest atomic radius.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following group 15 elements is the most reactive towards metals?

Options:
A Nitrogen
B Phosphorus
C Arsenic
D Antimony

The correct answer is:
Nitrogen

Solution:
The paragraph does not explicitly state which group 15 element is the most reactive towards metals, but it can be inferred that nitrogen is the most reactive because it is the smallest and lightest element in the group. This means that it has the highest ionization energy and electron affinity, making it more likely to react with metals.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following group exhibit maximum species diversity?

Options:
A Gymnosperms
B Algae
C Bryophytes
D Fungi

The correct answer is:
Fungi

Solution:
Fungi species are more than algae, bryophytes, and gymnosperms. The number of fungi species in the world are more than the combined total of the species of fishes, amphibians, reptiles and mammals.

Topic: Biology, Biodiversity and its Conservation, NEET
Which of the following group exhibit more species diversity?

Options:
A Gymnosperms
B Algae
C Bryophytes
D Fungi

The correct answer is:
Fungi

Solution:
Fungi group exhibit more species diversity.

Topic: Biology, Biodiversity and its Conservation, NEET
Which of the following group of organisms belongs to class Phaeophyceae?

Options:
A Ectocarpus, Dictyota, Fucus, and Sargassum
B Ectocarpus, Dictyota, Porphyra, and Gracilaria
C Chlamydomonas, Volvox, Ulothrix, and Fucus
D Sargassum, Dictyota, Gracilaria, and Gelidium

The correct answer is:
Ectocarpus, Dictyota, Fucus, and Sargassum

Solution:
The members of Phaeophyceae or brown algae are found primarily in marine habitats. They show great variation in size and form. They range from simple branched, filamentous forms (Ectocarpus) to profusely branched forms as represented by kelps, which may reach a height of 100 meters. They possess chlorophyll a, c, carotenoids, and xanthophylls. They vary in colour from olive green to various shades of brown depending upon the amount of the xanthophyll pigment, fucoxanthin present in them. Food is stored as complex carbohydrates, which may be in the form of laminarin or mannitol. The vegetative cells have a cellulosic wall usually covered on the outside by a gelatinous coating of algin. The protoplast contains, in addition to plastids, a centrally located vacuole and nucleus. The plant body is usually attached to the substratum by a holdfast and has a stalk, the stipe, and leaf-like photosynthetic organ - the frond. The common forms are Ectocarpus, Dictyota, Laminaria, Sargassum, and Fucus.

Topic: Biology, Plant Kingdom, NEET
Which of the following group of plants shows entomophily?

Options:
A Vallisneria, Grass, Amorphophallus
B Amorphophallus, Yucca, Zea mays
C Wheat, Zostera, Rafflesia
D Yucca, Ficus, Salvia

The correct answer is:
Yucca, Ficus, Salvia

Solution:
Yucca is pollinated by moth Pronuba during the process of laying eggs. Ficus is pollinated by gall wasp Blastophaga which lays its egg in the gall flowers of hypanthodium inflorescence. Salvia shows the lever mechanism of pollination by insects.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
Which of the following group of viruses infect the respiratory passage but not the lungs?

Options:
A Rhinovirus
B Coronavirus
C Pneumococcus
D Streptococcus

The correct answer is:
Rhinovirus

Solution:
The rhinovirus is the most common viral infectious agent in humans and is the predominant cause of the common cold. Rhinovirus infection proliferates in temperatures of 33-35 Â°C, the temperature range found in the nose.

Topic: Biology, Human Health and Diseases, NEET
Which of the following group represents all beneficial elements?

Options:
A Na,Si,Se,Ag
B Na,Se,Cu,Co
C Na,Si,Co,Se
D Na,Ne,Se,Co

The correct answer is:
Na,Si,Co,Se

Solution:
In addition to 17 essential elements, there are some elements which are required by plants and help the plants in various functions, these elements are called as beneficial elements. These elements are required by only some specific plants only.
(Hint; In addition to essential elements some other elements are required by some plants, these elements are known as beneficial elements.

Topic: Biology, Mineral Nutrition, NEET
Which of the following groups are cosmopolitan?

Options:
A Fungi
B Animals
C Plants
D Protista.

The correct answer is:
Fungi

Solution:
Fungi are cosmopolitan.

Topic: Biology, Biological Classification, NEET
Which of the following groups in amino acids is responsible for losing a proton in aqueous solution?

Options:
A Carboxyl group
B Amino group
C Both carboxyl and amino groups
D Neither carboxyl nor amino groups

The correct answer is:
Carboxyl group

Solution:
The carboxyl group in amino acids is responsible for losing a proton in aqueous solution.

Topic: Chemistry, Biomolecules, NEET
Which of the following groups is absolutely essential functional component of the ecosystem?

Options:
A Producers
B Producers and herbivores
C Producers and detritivores
D Detritivores

The correct answer is:
Producers and detritivores

Solution:
Ecosystem composed of biotic (living) and abiotic (non-living) component. Biotic component includes producers, consumers and detritivores. The producers and detritivores are absolutely essential functional component of the ecosystem.

Topic: Biology, Ecosystem, NEET
Which of the following groups is NOT a meta directing group in electrophilic aromatic substitution reactions?

Options:
A -SO3H
B -COR
C -OH
D -COOR

The correct answer is:
-OH

Solution:
-OH is not a meta directing group; it is an ortho/para directing group.

Topic: Chemistry, Hydrocarbons, NEET
Which of the following groups is NOT a meta directing group in electrophilic aromatic substitution reactions?

Options:
A -CN
B -CHO
C -NH2
D -OH

The correct answer is:
-NH2

Solution:
-NH2 is not a meta directing group; it is an ortho/para directing group.

Topic: Chemistry, Hydrocarbons, NEET
Which of the following groups is not a part of the Five Kingdom classification
proposed by Whittaker (1969)?

Options:
A Monera
B Protista
C Fungi
D Animals

The correct answer is:
Animals

Solution:
Whittaker's Five Kingdom classification includes Monera, Protista, Fungi, Animalia, and Plantae. Animals are not included in this classification system.

Topic: Biology, Plant Kingdom, NEET
Which of the following groups is NOT an activating group in electrophilic aromatic substitution?

Options:
A Hydroxyl (-OH) group
B Alkyl (-CH3) group
C Cyano (-CN) group
D Amino (-NH2) group

The correct answer is:
Cyano (-CN) group

Solution:
Cyano (-CN) groups are deactivating groups in electrophilic aromatic substitution reactions due to their -M and -I effects, unlike the other groups listed.

Topic: Chemistry, Hydrocarbons, NEET
Which of the following groups is NOT an ortho or para directing group in electrophilic aromatic substitution reactions?

Options:
A Nitro (-NO2) group
B Alkyl (-CH3) group
C Amino (-NH2) group
D Hydroxyl (-OH) group

The correct answer is:
Alkyl (-CH3) group

Solution:
Alkyl (-CH3) groups are not ortho or para directing in electrophilic aromatic substitution reactions. They do not significantly influence the electron density distribution on the benzene ring.

Topic: Chemistry, Hydrocarbons, NEET
Which of the following groups of organisms are ecologically similar?

Options:
A Producer protists and consumer protists
B Monerans and producer protists
C Consumer protists and fungi
D Monerans and fungi

The correct answer is:
Monerans and fungi

Solution:
Most of the monerans and fungi are decomposers, i. e., biotic components of the ecosystem, which are involved in the detritus food chain.

Topic: Biology, Biological Classification, NEET
Which of the following groups of organisms are included under chrysophytes?

Options:
A Diatoms and desmids (golden algae)
B Diatoms and dinoflagellates
C Euglenoids
D Slime moulds

The correct answer is:
Diatoms and desmids (golden algae)

Solution:
Chrysophytes are also known as the golden algae due to the presence of yellow and brown carotene and xanthophyll accessory pigment. They are facultatively heterotrophic in the absence of light. They are unicellular and biflagellated.

Topic: Biology, Biological Classification, NEET
Which of the following groups of organisms have kidneys as their excretory organs?

Options:
A Tunicates, Lancelets, Cyclostomes, Chondrichthyes, Osteichthyes and Amphibians
B Cyclostomes, Chondrichthyes, Osteichthyes and Amphibians
C Lancelets, Cyclostomes, Chondrichthyes, Osteichthyes and Amphibians
D Tunicates, Cyclostomes, Chondrichthyes, Osteichthyes and Amphibians

The correct answer is:
Cyclostomes, Chondrichthyes, Osteichthyes and Amphibians

Solution:
Phylum Chordates are divided into three subgroups: Urochordates, Cephalochordates and Vertebrates. First two sub groups are collectively known as Protochordates. Urochordates have notochord only in the tail region of larva and are covered with a tunic hence are Tunicates. Examples are Ascidia, Doliolum and Salpa. Cephalochordates have notochord from head to tail and Lancelets belong to this group. Protochordates are different from Verterbrates as these do not have well developed kidneys for excretion.

Topic: Biology, Animal Kingdom, NEET
Which of the following groups of plants are propagated through underground root?

Options:
A Ginger, Potato, onion and zamikand
B Bryophyllum and Kalanchoe
C Pistia, Chrysanthemum and pineapple
D Sweet potato, Asparagus, Tapioca and Dahlia

The correct answer is:
Sweet potato, Asparagus, Tapioca and Dahlia

Solution:
Reproductive roots are adventitious roots which are generally fleshy and develop adventitious buds, e.g., sweet potato, Dahlia, Asporagus, Topioca, etc.

Topic: Biology, Reproduction in Organisms, NEET
Which of the following groups of plants are propagated through underground roots?

Options:
A Bryophyllum and Kalanchoe
B Ginger, potato, onion and zimikand
C Pista, chrysanthemum and pineapple
D Sweet potato, Asparagus, Tapioca and Dahlia

The correct answer is:
Sweet potato, Asparagus, Tapioca and Dahlia

Solution:
There are different natural modes of vegetative reproduction in plants. Underground roots, e.g., sweet potato, Asparagus, Tapioca and Dahlia have fleshy, adventitious, tuberous roots, which help in propagation.

Topic: Biology, Morphology of Flowering Plants, NEET
Which of the following groups of plants bear archegonia?

Options:
A Bryophytes
B Pteridophytes
C Gymnosperms
D Angiosperms

The correct answer is:
Gymnosperms

Solution:
One of the megaspores enclosed within the megasporangium develops into a Multicellular female gametophyte that bears two or more archegonia or female sex organ.

Topic: Biology, Plant Kingdom, NEET
Which of the following groups of viruses are known to infect the nose and respiratory passage in humans?

Options:
A Retroviruses
B Echoviruses
C Rhinoviruses
D Oncogenic viruses

The correct answer is:
Rhinoviruses

Solution:
Rhinoviruses cause one of the most infectious human ailments â the common cold. They infect the nose and respiratory passage but not the lungs. The common cold is characterised by nasal congestion and discharge, sore throat, hoarseness, cough, headache, tiredness, etc., which usually last for 3-7 days. Droplets resulting from cough or sneezes of an infected person are either inhaled directly or transmitted through contaminated objects such as pens, books, cups, doorknobs, computer keyboard or mouse, etc., and cause infection in a healthy person.

Topic: Biology, Human Health and Diseases, NEET
Which of the following groups operates as an ortho and para directing group in electrophilic aromatic substitution reactions despite having a slight -I effect?

Options:
A Phenolic (-OH) group
B Amino (-NH2) group
C Methyl (-CH3) group
D Cyano (-CN) group

The correct answer is:
Phenolic (-OH) group

Solution:
The phenolic (-OH) group is an ortho and para directing group in electrophilic aromatic substitution reactions. It does have a slight -I effect, but the resonance effect dominates, increasing electron density at the ortho and para positions.

Topic: Chemistry, Hydrocarbons, NEET
Which of the following growth regulators is an adenine derivative?

Options:
A Auxin
B Cytokinin
C Ethylene
D Abscisic acid

The correct answer is:
Cytokinin

Solution:
Cytokinin is a cell division inducing hormone derived from Adenine, a purine type nitrogenous base.
$\rightarrow$ Cytokinin was first obtained from autoclaved Herring sperm DNA.

Topic: Biology, Plant - Growth and Development, NEET, NEET 2022 (Phase 2)
Which of the following guards the opening of the hepatopancreatic duct into the duodenum?

Options:
A Semilunar valve
B Ileocaecal valve
C Pyloric sphincter
D Sphincter of Oddi

The correct answer is:
Sphincter of Oddi

Solution:
The opening of the hepatopancreatic duct into the duodenum is guarded by sphincter of Oddi is a muscular valve that controls the flow of digestive juices through the ampulla of Vater into the second part of the duodenum. It is named after Ruggero Oddi.

Topic: Biology, Digestion and Absorption, NEET, NEET 2016 (Phase 1)
Which of the following had the smallest brain capacity?

Options:
A Homo erectus
B Homo sapiens
C Homo neanderthalensis
D Homo habilis

The correct answer is:
Homo habilis

Solution:
In the history of human evolution, Homo habilis (Handy man) is considered to be the first human which evolved from Australopithecus. It had the smallest brain capacity among all the species, somewhere within a range of 650-800cc. There is a high possibilty that these hominids did not eat meat.

Topic: Biology, Evolution, NEET, NEET 2015 (Phase 1)
Which of the following halides cannot be hydrolysed at room temperature?
I. TeF6 II. SF6 III. NCl3 IV. NF3

Options:
A III and IV
B I, II and III
C I, II and IV
D II and IV

The correct answer is:
II and IV

Solution:
Here SF6 cannot be hydrolysed at room temperature as in SF6, S-atom is sterically hindered by six fluorine atoms hence, attack of H2O molecule will not occur. NF3 is not hydrolysed due to absence of vacant orbital on both N and F-atoms.
TeF6 is hydrolysed due to large size of Te and presence of vacant d-orbital.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following halides is more covalent: SnCl2 or SnCl4?

Options:
A SnCl2
B SnCl4
C They have the same covalency
D It depends on the temperature

The correct answer is:
SnCl4

Solution:
SnCl4 is more covalent than SnCl2.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following haloalkanes reacts with aqueous KOH most easily? Explain giving reasons. (i) 1-Bromobutane (ii) 2-Bromobutane (iii) 2-Bromo-2-methylpropane (iv) 2-Chlorobutane

Options:
A (i) as the tertiary carbocation formed in the reaction is unstable.
B (iii) as the tertiary carbocation formed in the reaction is stable.
C (ii) as the tertiary carbocation formed in the reaction is stable.
D (iv) as the tertiary carbocation formed in the reaction is unstable.

The correct answer is:
(iii) as the tertiary carbocation formed in the reaction is stable.

Solution:
Correct Option is : (B)
(iii) as the tertiary carbocation formed in the reaction is stable.

Topic: Chemistry, Haloalkanes and Haloarenes, NEET
Which of the following halogen atoms is the smallest in terms of atomic size?

Options:
A Chlorine (Cl)
B Bromine (Br)
C Iodine (I)
D Fluorine (F)

The correct answer is:
Fluorine (F)

Solution:
Fluorine is the smallest halogen atom in terms of atomic size, followed by chlorine, bromine, and iodine, in that order.

Topic: Chemistry, Hydrocarbons, NEET
Which of the following halogen cannot form more than one oxoacids?

Options:
A

Bromine

B

Iodine

C

Fluorine

D

Chlorine

The correct answer is:

Fluorine

Solution:
Due to high electronegativity and small size fluorine forms only one oxoacid, HOF known as fluoric (I) acid. The other halogen forms several oxoacids.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following halogen oxide is used for estimation of carbon monoxide in automobile exhaust gases?

Options:
A Cl2O7
B I2O5
C ClO2
D BrO3

The correct answer is:
I2O5

Solution:
I2O5 is used for estimation of carbon monoxide in automobile exhaust gases.
5CO+I2O5→5CO2+I2
I2+2Na2S2O3→2Nal+Na2S4O6

Topic: Chemistry, p Block Elements (Group 13 & 14), NEET
Which of the following halogens does not readily add to an alkene to form vicinal dihalides?

Options:
A Bromine
B Chlorine
C Iodine
D Fluorine

The correct answer is:
Iodine

Solution:
Iodine does not readily add to alkenes to form vicinal dihalides under normal conditions.

Topic: Chemistry, Hydrocarbons, NEET
Which of the following halogens is a liquid at room temperature?

Options:
A Chlorine (Cl2)
B Bromine (Br2)
C Iodine (I2)
D Fluorine (F2)

The correct answer is:
Bromine (Br2)

Solution:
Bromine is a liquid at room temperature, while the other halogens are gases (F2 and Cl2) or solids (I2).

Topic: Chemistry, Hydrocarbons, NEET
Which of the following halogens is commonly used in the Wurtz reaction?

Options:
A Chlorine (Cl)
B Bromine (Br)
C Fluorine (F)
D Iodine (I)

The correct answer is:
Bromine (Br)

Solution:
Bromine is commonly used as the halogen source in the Wurtz reaction.

Topic: Chemistry, Hydrocarbons, NEET