datavorous/entrance-exam-dataset huggingface dataset:
Which of the following improved breeds is used in poultry farming?

Options:
A Jersey
B Leghorn
C Hisardale
D Rohu

The correct answer is:
Leghorn

Solution:
Leghorn is one of the most improved breeds of hens used in poultry farming.
Jersey is an improved breed of cow, while Hisardale is a sheep hybrid. Mule is a hybrid between donkey and horse.

Topic: Biology, Strategies for Enhancement in Food Production, NEET
Which of the following impurities is formed in the preparation of dinitrogen by the treatment of an aqueous solution of ammonium chloride with sodium nitrite?

Options:
A NO
B HNO3
C Both NO and HNO3
D None of the above

The correct answer is:
Both NO and HNO3

Solution:
The paragraph states that small amounts of NO and HNO3 are also formed in the preparation of dinitrogen by the treatment of an aqueous solution of ammonium chloride with sodium nitrite.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following in the wrong function of the corresponding part in the angiosperm plant?

Options:
A Nucellus = Nourishment of developing embryo sac
B Pollen kitt = Protectionof pollengrains from UV rays
C Fillorm apparatus = Secreting chemicals for attracting the pollen tube towards micropyle of ovule
D Pollen tube = Formed by generative nucleus

The correct answer is:
Pollen tube = Formed by generative nucleus

Solution:
The pollen tube is formed by the vegetative cell of the pollen grain. The vegetative cell produces a tubular protrusion from the pollen grain, which carries the sperm cells which were present in the cytoplasm.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
Which of the following incorrect about Ichthyophis?

Options:
A External fertilization
B Oviparous nature
C Two pairs of limbs
D Absence of exoskeleton

The correct answer is:
Two pairs of limbs

Solution:
Ichthyophis is a limbless amphibian. It belongs to the Order Apoda. External fertilization, oviparous nature and absence of exoskeleton are its features.

Topic: Biology, Animal Kingdom, NEET
Which of the following interactions is not correctly matched?

Options:
A

Type of interaction	Species	Nature

A	B

Mutualism	+	+	Both the interacting species show interdependence.

B

Type of interaction	Species	Nature

A	B

Commensalism	+	0	One of the species is benefitted, while the other species is unaffected.

C

Type of interaction	Species	Nature

A	B

Predation	+	-	One of the species is benefitted, while the other species is harmed.

D

Type of interaction	Species	Nature

A	B

Competition	-	-	One of the species is benefitted, while the other species is harmed.

The correct answer is:

Type of interaction	Species	Nature

A	B

Competition	-	-	One of the species is benefitted, while the other species is harmed.

Solution:
Competition in the broadest sense refers to the interaction of two organisms striving for the same resource. Competition amongst the individuals of same species for one or more common resources is intraspecific competition, and between the organisms of different species is interspecific competition. Surely, intraspecific competition is more acute because all organisms of the same species have similar requirements for food, space, light, water, shelter, etc. When Darwin spoke of the struggle for existence and ‘survival of the fittest in nature’, he was convinced that interspecific competition is a potent force in organic evolution. It is a (-,-) relationship.

Topic: Biology, Organisms and Populations, NEET
Which of the following intermolecular forces exist between HF molecules in the liquid state?

Options:
A London dispersion forces
B Ionic bonding
C Induced dipole interaction
D Hydrogen bonding

The correct answer is:
Hydrogen bonding

Solution:
Correct Option is : (D)
Hydrogen bonding

Topic: Chemistry, States of Matter, NEET
Which of the following involves maximum amount of energy?

Options:
A Ca(g)→ Ca + (g)
B Ca + (g)→ Ca 2+ (g)
C Mg+(g)âMg2+(g)
D Mg2+(g)âMg3+(g)

The correct answer is:
Mg2+(g)→Mg3+(g)

Solution:
The process D involves the removal of the electron from fully filled 2p-orbitals, which has electronic configuration of the noble gas 'neon' so it need maximum amount of energy.

Topic: Chemistry, Classification of Elements and Periodicity in Properties, NEET
Which of the following ion has maximum value of magnetic moment

Options:
A Cu+2
B Mn+3
C Fe+3
D V+3

The correct answer is:
Fe+3

Solution:
Fe+3

S. No.	Outer configu-ration	No. of unpaired e-	Colour of ion	Magnetic moment

V+3	3d2	2	Green	2.76

Mn+3	3d4	4	Violet	1.9

Fe+3	3d5	5	Yellow	5.96

Cu+2	3d9	1	Blue	1.9

Topic: Chemistry, Coordination Compounds, NEET
Which of the following ion helps in transmission of impulse across the synapse?

Options:
A Na+
B K+
C Ca2+
D Mg2+

The correct answer is:
Ca2+

Solution:
Synapse is the junction through which an impulse is transmitted from one neuron to another. It is formed by the membranes of the pre-synaptic and post-synaptic neurons. The neurons are separated by a synaptic cleft. The Ca2+ ion helps in transmission of impulse across the synapse.
Na+ and K+ ion help in conduction of nerve impulse along a neuron.

Topic: Biology, Neural Control and Coordination, NEET
Which of the following ion is expected to have highest value of molar conductivity at infinite dilution in the aqueous solution?

Options:
A Na+
B K+
C Ca2+
D H+

The correct answer is:
H+

Solution:
Among the cations H+ has the maximum conductivity due to grotthuss conduction.

Topic: Chemistry, Electrochemistry, NEET
Which of the following ion moves first during the generation of an action potential along the axon?

Options:
A Mg2+
B Ca2+
C K+
D Na+

The correct answer is:
Na+

Solution:
Generation of action potential: Stimulus is applied at a site on the polarised membrane â It becomes freely permeable to Na+â Rapid influx of Na+â Reversal of the polarity at that site (extremely short-lived event).

Topic: Biology, Neural Control and Coordination, NEET
Which of the following ionic species has the greatest proton affinity to form stable compound?

Options:
A $\mathrm{NH}_2^{-}$
B $\mathrm{F}^{-}$
C $1^{-}$
D $\mathrm{HS}^{-}$

The correct answer is:
$\mathrm{NH}_2^{-}$

Solution:
Proton affinity decreases in moving across the period from left to right due to increase in charge. Within a group the proton affinities decreases from top to bottom.
$\Rightarrow$ Proton affinity $\rightarrow$ Nitrogen family $>$ Oxygen family $>$ Halogens

Topic: Chemistry, Classification of Elements and Periodicity in Properties, NEET, NEET 2007
Which of the following ions can exhibit paramagnetic behavior?

Options:
A H+
B O2−
C Cu2+
D Na+

The correct answer is:
Cu2+

Solution:
Cu2+ is an example of an ion that can exhibit paramagnetic behavior due to the presence of unpaired electrons.

Topic: Chemistry, Solid State, NEET
Which of the following ions is not a self-indicator in titrations?

Options:
A Mn2+
B Fe2+
C MnO4-
D Cr2O72-

The correct answer is:
Cr2O72-

Solution:
Cr2O72- is not a self-indicator in titrations.

Topic: Chemistry, Redox Reactions, NEET
Which of the following ions is not an example of a paramagnetic substance?

Options:
A Fe3+
B Cr3+
C O2−
D Ni2+

The correct answer is:
O2−

Solution:
O2− is not an example of a paramagnetic substance because it contains paired electrons, which do not contribute to paramagnetism.

Topic: Chemistry, Solid State, NEET
Which of the following ions is smaller than the parent atom among alkali metals?

Options:
A M+ (Monovalent ion)
B M2+ (Divalent ion)
C M3+ (Trivalent ion)
D M- (Negative ion)

The correct answer is:
M+ (Monovalent ion)

Solution:
Among alkali metals, the monovalent ions (M+) are smaller than the parent atom. This is because the loss of one electron results in a decrease in electron repulsion and a smaller ionic radius.

Topic: Chemistry, s Block Elements, NEET
Which of the following ions plays a significant role in Kolbe's electrolytic method?

Options:
A Sodium ion
B Chloride ion
C Acetate ion
D Sulfate ion

The correct answer is:
Acetate ion

Solution:
Acetate ions are a key part of the reaction mechanism in Kolbe's electrolytic method, as they are involved in the formation of methyl free radicals.

Topic: Chemistry, Hydrocarbons, NEET
Which of the following ions will exhibit colour in aqueous solutions ?

Options:
A $\mathrm{La}^{3+}(\mathrm{Z}=57)$
B $\mathrm{Ti}^{3+}(\mathrm{Z}=22)$
C $\mathrm{Lu}^{3+}(\mathrm{Z}=71)$
D $\mathrm{Sc}^{3+}(\mathrm{Z}=21)$

The correct answer is:
$\mathrm{Ti}^{3+}(\mathrm{Z}=22)$

Solution:
Key Idea:- Colour is obtained as a consequence of $d-d($ or $f-f)$ transition, and for $d-d$ (or $f-f)$ transition, presence of unpaired electrons is the necessary condition.
$$
\begin{gathered}
\mathrm{La}^{3+}(\mathrm{Z}=57)=[\mathrm{Xe}] 4 \mathrm{f}^0 5 \mathrm{~d}^0 6 \mathrm{~s}^0 \\
\text { (no unpaired electron) } \\
\mathrm{Ti}^{3+}(\mathrm{Z}=22)=[\mathrm{Ar}] 3 \mathrm{~d}^1 4 \mathrm{~s}^0 \\
\text { (one unpaired electron) } \\
\mathrm{Lu}^{3+}(\mathrm{Z}=71)=[\mathrm{Xe}] 4 \mathrm{f}^{14} 5 \mathrm{~d}^0 6 \mathrm{~s}^0 \\
\text { (no unpaired electron) } \\
\mathrm{Sc}^{3+}(\mathrm{Z}=21)=[\mathrm{Ar}] 3 \mathrm{~d}^0 4 \mathrm{~s}^0
\end{gathered}
$$
(no unpaired electron) Hence, only $\mathrm{Ti}^{3+}$ will exhibit colour in aqueous solution.

Topic: Chemistry, d and f Block Elements, NEET, NEET 2010 (Screening)
Which of the following ions will exhibit colour in aqueous solutions?

Options:
A Sc3+(Z=21)
B La3+(Z=57)
C Ti3+(Z=22)
D Lu3+(Z=71)

The correct answer is:
Ti3+(Z=22)

Solution:
Here only Ti3+ has one unpaired electron so it gives colour in aqueous solution due to d-d e- transition. Rest ions are colourless as they don’t any un-paired electron so no d-d electronic transition.

Topic: Chemistry, d and f Block Elements, NEET
Which of the following ions will liberate iodine when treated with KI?

Options:
A Cu2+
B Fe2+
C Pb2+
D Sn2+

The correct answer is:
Cu2+

Solution:
Cu2+ ions can oxidize iodide to iodine.

Topic: Chemistry, d and f Block Elements, NEET
Which of the following is a 4-carbon compound?

Options:
A Oxaloacetic acid
B Phosphoglyceric acid
C Oxalosuccinic acid
D Phosphoenolpyruvate

The correct answer is:
Oxaloacetic acid

Solution:
Chemical substances containing carbon atoms are known as carbon compounds. The compound having 4 carbon atoms like oxaloacetic acid which has the chemical formula HO₂CCCH₂CO₂H. It is a 4 carbon compound that acts as an intermediate of the citric acid cycle by combining with acetyl-CoA and producing citric acid having six carbon atoms. This compound is then reduced to malate using NADH.

Topic: Biology, Photosynthesis in Higher Plants, NEET
Which of the following is a '5C' compound formed during Kreb's cycle in the matrix of the mitochondria?

Options:
A Oxaloacetic acid
B Citric acid
C α-ketoglutaric acid
D Succinic acid

The correct answer is:
α-ketoglutaric acid

Solution:
During oxidation of Pyruvic acid in matrix of mitochondria different 6C, 5C and 4C intermediates are formed. α -ketoglutaric acid is a 5C intermediate which is formed during Kreb's cycle in matrix of mitochondria.

Topic: Biology, Respiration in Plants, NEET
Which of the following is a bacterium involved in denitrification?

Options:
A Nitrococcus
B Nitosomonas
C Pseudomonas
D Nitrobacter

The correct answer is:
Pseudomonas

Solution:
Some bacteria such as Thiobacillus denitrificans, Pseudomonas aeruginosa, and Micrococcus denitrificans also occur in the soil which converts the nitrate and ammonia into atmospheric free elemental nitrogen. Such bacteria are called denitrifying bacteria and the process is called denitrification. These bacteria act very well in the soil where there are more water and less oxygen and there is a high level of the carbohydrate.

Topic: Biology, Mineral Nutrition, NEET
Which of the following is a basic amino acid?

Options:
A Alanine
B Tyrosine
C Lysine
D Serine

The correct answer is:
Lysine

Solution:
since it contains more number of -NH2 groups as compared to -COOH groups hence it is basic amino acid.

Topic: Chemistry, Biomolecules, NEET, NEET 2020 (Phase 1)
Which of the following is a basic requirement for refining of a metal by Mond process and by Van Arkel Method.

Options:
A The metal to be refined should be kept in a water bath before it goes through Mond process and Van Arkel Method
B The metal to be refined should be soft
C The compound formed should be non-decomposable, so that recovery of metal is easy.
D The metal should form a volatile compound with an available reagent.

The correct answer is:
The metal should form a volatile compound with an available reagent.

Solution:
Correct Option is : (D)
The metal should form a volatile compound with an available reagent.

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
Which of the following is a benefit of using dinitrogen as a refrigerant?

Options:
A It is non-toxic.
B It is non-flammable.
C It has a low boiling point.
D All of the above.

The correct answer is:
All of the above.

Solution:
Dinitrogen is a non-toxic, non-flammable refrigerant with a low boiling point. This makes it a very safe and effective refrigerant.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following is a branched polymer, having branched chain polysaccharide units?

Options:
A Starch
B Bakelite
C High density polyethylene
D Nylon

The correct answer is:
Starch

Solution:
Starch is composed of two types of polymeric chains known as amylose and amylopectin. Amylose possesses a linear structure with α, 1–4 glycosidic linkage while amylopectin possesses a branched structure with α, 1–4 as well as α, 1–6 glycosidic linkages

Topic: Chemistry, Biomolecules, NEET
Which of the following is a broadly utilitarian reason for the conservation of biodiversity?

Options:
A Human derive direct economic benefit from nature.
B Many drugs are derived from plants.
C Medicinally useful plants are present in tropical forest.
D Many insect pollinates the plants.

The correct answer is:
Many insect pollinates the plants.

Solution:
The broadly utilitarian argument says that biodiversity plays a major role in many ecosystem services that nature provides. Pollination by insects is an ecosystem service, thus is a broadly utilitarian reason. The narrowly utilitarian argument for conservation of biodiversity are obvious, human derive countless economic benefits from nature.

Topic: Biology, Biodiversity and its Conservation, NEET
Which of the following is a brown gas formed during strong heating of Pb(NO3)2?

Options:
A N2O
B NO2
C NO
D N2O3

The correct answer is:
NO2

Solution:
Correct Option is : 2
NO2

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following is a byproduct of the commercial production of dinitrogen by the liquefaction and fractional distillation of air?

Options:
A Liquid oxygen
B Liquid nitrogen
C Both A and B
D None of the above

The correct answer is:
Liquid oxygen

Solution:
The paragraph states that liquid oxygen is a byproduct of the commercial production of dinitrogen by the liquefaction and fractional distillation of air.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following is a cationic detergent?

Options:
A Sodium stearate
B Cetyltrimethyl ammonium bromide
C Sodium dodecylbenzene sulphonate
D Sodium lauryl sulphate

The correct answer is:
Cetyltrimethyl ammonium bromide

Solution:
Cetyltrimethyl ammonium bromide
C19H42N+Br- (cationic detergent)
These are synthetic detergents.

Topic: Chemistry, Chemistry in Everyday Life, NEET, NEET 2020 (Phase 1)
Which of the following is a challenge of using dinitrogen as a refrigerant?

Options:
A It is expensive.
B It is difficult to produce.
C It is difficult to transport.
D All of the above.

The correct answer is:
It is expensive.

Solution:
Dinitrogen is a relatively expensive refrigerant. This is because it requires a lot of energy to produce and liquefy dinitrogen.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following is a characteristic feature of zoospores?

Options:
A They are motile
B They are macroscopic
C They are non-motile
D They are sexual spores

The correct answer is:
They are motile

Solution:
A zoospore is a motile, microscopic, asexual spore that uses a flagellum for locomotion. Also called a swarm spore, these spores are created by some algae, bacteria and fungi to propagate themselves.

Topic: Biology, Reproduction in Organisms, NEET
Which of the following is a characteristic of an early community?

Options:
A Narrow niche specialization.
B High species diversity.
C High community production.
D Dense food web

The correct answer is:
Narrow niche specialization.

Solution:
An ecological niche is the role and position a species has in its environment and describes how it meets its needs for food and shelter, how it survives and how it reproduces. A species' niche includes all of its interactions with the biotic and abiotic factors of its environment. Early community has broader niche, i.e., niche is less specialized.

Topic: Biology, Organisms and Populations, NEET
Which of the following is a characteristic of diploblastic animals?

Options:
A Presence of an undifferentiated layer between the ectoderm and endoderm
B Absence of a mesoderm layer
C Presence of a single embryonic layer
D Absence of a mesoglea layer

The correct answer is:
Presence of an undifferentiated layer between the ectoderm and endoderm

Solution:
Diploblastic animals are characterized by the presence of two embryonic layers, an external ectoderm and an internal endoderm, with an undifferentiated layer, mesoglea, in between.

Topic: Biology, Animal Kingdom, NEET
Which of the following is a characteristic of eubacteria?

Options:
A A flexible cell wall
B The absence of a flagellum
C The presence of a rigid cell wall
D The ability to photosynthesize

The correct answer is:
The presence of a rigid cell wall

Solution:
Eubacteria, also known as "true bacteria," are characterized by the presence of a rigid cell wall.

Topic: Biology, Biological Classification, NEET
Which of the following is a characteristic of meta directing groups in electrophilic aromatic substitution reactions?

Options:
A They increase electron density at the ortho position.
B They increase electron density at the para position.
C They decrease electron density at the meta position.
D They are highly activating groups.

The correct answer is:
They decrease electron density at the meta position.

Solution:
Meta directing groups decrease electron density at the meta position in electrophilic aromatic substitution reactions.

Topic: Chemistry, Hydrocarbons, NEET
Which of the following is a characteristic property of sodium hydrogen carbonate?

Options:
A It is highly soluble in water
B It is a strong acid
C It decomposes on heating to release oxygen
D It is used as a sweetener in food products

The correct answer is:
It decomposes on heating to release oxygen

Solution:
Sodium hydrogencarbonate decomposes on heating to release carbon dioxide and not oxygen.

Topic: Chemistry, s Block Elements, NEET
Which of the following is a chiral molecule?

Options:
A (ii)
B (i)
C Both of them are chiral molecule
D None of them are chiral molecule

The correct answer is:
(i)

Solution:
Correct Option is : (B)
(i)

Topic: Chemistry, Haloalkanes and Haloarenes, NEET
Which of the following is a chiral molecule?

Options:
A (i)
B (ii)
C Both of them are chiral molecule
D None of them are chiral molecule

The correct answer is:
(i)

Solution:
Correct Option is : (A)
(i)

Topic: Chemistry, Haloalkanes and Haloarenes, NEET
Which of the following is a coconut milk factor?

Options:
A Auxin
B Cytokinin
C Morphactin
D None of the above

The correct answer is:
Cytokinin

Solution:
Cytokinins are plant growth hormones that are basic in nature and derivatives of aminopurine or phenyl urea. These hormones promote cell division (cytokinesis) either alone or in conjugation with auxin. In liquid endosperm of coconut kinetin (cytokinin) are present.

Topic: Biology, Strategies for Enhancement in Food Production, NEET
Which of the following is a co-factor for the proteolytic enzyme carboxypeptidase?

Options:
A Iron
B Zinc
C Copper
D Manganese

The correct answer is:
Zinc

Solution:
Enzymes are proteinaceous in nature. Some enzymes also contain non-protein part known as co-factors. These factors are attached to the enzyme to enhanced their catalytic activity. The protein part of the enzyme is known as apoenzyme. Hence, apoenzyme (protein part) + Co-factors (non-protein part) = holoenzyme (whole enzyme).As the co-factors are bound to enzymes, the removal of these factors affects the overall activity of enzymes too. These co-factors can be organic or inorganic. Organic cofactors if tightly bound are known as prosthetic groups and if loosely bound are termed as co-enzymes. The inorganic co-factors are metal ions. Example of inorganic co-factor is zinc which is a co-factor of enzyme carboxypeptidase.

Topic: Chemistry, Biomolecules, NEET
Which of the following is a commercial blood cholesterol-lowering agent?

Options:
A Cyclosporin A
B Statin
C Streptokinase
D Lipases

The correct answer is:
Statin

Solution:
Statins: These are produced by the yeast Monascus purpureus. Statins have been commercialized as blood-cholesterol lowering agents. It acts competitively inhibiting the enzyme responsible for synthesis cholesterol. Statins, also known as HMG-CoA reductase inhibitors, are a class of lipid-lowering medications that are thought to reduce illness and mortality in those who are at high risk of cardiovascular disease.

Topic: Biology, Microbes in Human Welfare, NEET, NEET 2019 (All India)
Which of the following is a commercial method for the production of dinitrogen?

Options:
A The liquefaction and fractional distillation of air
B The treatment of an aqueous solution of ammonium chloride with sodium nitrite
C The thermal decomposition of ammonium dichromate
D The thermal decomposition of sodium or barium azide

The correct answer is:
The thermal decomposition of sodium or barium azide

Solution:
The paragraph states that dinitrogen is produced commercially by the liquefaction and fractional distillation of air, the treatment of an aqueous solution of ammonium chloride with sodium nitrite, the thermal decomposition of ammonium dichromate, and the thermal decomposition of sodium or barium azide.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Which of the following is a common characteristic between earthworm, leech, and a centipede?

Options:
A They have Malpighian tubules
B They are hermaphrodite
C They have a ventral nerve cord
D They have no legs

The correct answer is:
They have a ventral nerve cord

Solution:
The ventral nerve cord possesses segmental ganglia. It is common in the earthworm, leech, and a silkworm. Earthworm and leech belong to phylum Annelida, and silkworm to phylum Arthropoda.

Topic: Biology, Animal Kingdom, NEET
Which of the following is a common feature of Ascidia, Pristis, Hyla and Calotes?

Options:
A Skeleton made up of cartilage and bone
B Solid, dorsal and double nerve cord
C Three chambered heart with closed circulatory system
D Paired pharyngeal gill slits at least in embryonic stage

The correct answer is:
Paired pharyngeal gill slits at least in embryonic stage

Solution:
Ascidia is a urochordate with an open circulatory system and is a protochordate. Pristis is a cartilaginous sawfish and is jawed vertebrae bear fins. Hyla is a tree frog with a bony skeleton. Calotes is a garden lizard with bony skeleton all these animals bears the paired pharyngeal gill slits at least in the embryonic stage (chordates have the dorsal, hollow nerve cord).

Topic: Biology, Animal Kingdom, NEET
Which of the following is a common freshwater fish in India?

Options:
A Hilsa
B Rohu
C Mackerel
D Lobster

The correct answer is:
Rohu

Solution:
Some of the freshwater fishes which are very common include Catla, Rohu and common carp.

Topic: Biology, Strategies for Enhancement in Food Production, NEET