datavorous/entrance-exam-dataset huggingface dataset:
In commensalism,

Options:
A both partners are benefitted
B both partners are harmed
C weaker is benefitted while stronger is unharmed
D weaker is harmed while stronger is benefitted

The correct answer is:
weaker is benefitted while stronger is unharmed

Solution:
The relationship where one organism benefits without harming the other is called commensalism. In it, one of the two species obtain food or benefits from other without benefitting or harming the other species.
Classic example is between cattle and egret.
In commensalism, one organism benefits from the other without affecting it. Commensalism is a relation between individuals of two species in which one species obtains food or other benefits from the other without either harming or benefiting the latter.

Topic: Biology, Organisms and Populations, NEET
In comparison to alcohols and many simple phenols, where do carboxylic acids rank in terms of acidity?

Options:
A Carboxylic acids are less acidic than alcohols.
B Carboxylic acids are equally acidic as alcohols.
C Carboxylic acids are more acidic than alcohols and many simple phenols.
D Carboxylic acids are less acidic than simple phenols.

The correct answer is:
Carboxylic acids are more acidic than alcohols and many simple phenols.

Solution:
Carboxylic acids are more acidic than alcohols and many simple phenols.

Topic: Chemistry, Aldehydes, Ketones and Carboxylic Acids, NEET
In comparison to gasoline and other fuels, how does dihydrogen's energy release per unit mass of fuel typically compare?

Options:
A It releases less energy
B It releases about the same amount of energy
C It releases more energy
D It releases no energy

The correct answer is:
It releases more energy

Solution:
Dihydrogen typically releases greater energy per unit mass of fuel in comparison to gasoline and other fuels.

Topic: Chemistry, Hydrogen, NEET
In comparison to the universe, how large is the earth?

Options:
A Almost as large
B About the same size
C A speck
D Very small

The correct answer is:
A speck

Solution:
Relatively speaking, the earth is almost only a speck compared to the vast size of the universe.

Topic: Biology, Evolution, NEET
In comparison to the zeolite process for the removal of permanent hardness, the synthetic resins method is

Options:
A More efficient as it can exchange only cations
B Less efficient as the resins cannot be regenerated
C More efficient as it can exchange both cations as well as anions
D Less efficient as it exchanges only anions.

The correct answer is:
More efficient as it can exchange both cations as well as anions

Solution:
(A) Zeolite method removes only cations ( Ca2+ and Mg2+ ion) present in hard water
2NaZ+M2+(aq)→MZ2(s)+2Na+(aq)(M→Mg,Ca)
(B) Synthetic resin method removes cations ( Ca2+ and Mg2+ ion) and anions (like Cl-,HCO3-,SO42- etc.)

Topic: Chemistry, s Block Elements, NEET
In complete combustion of a hydrocarbon, which products are formed?

Options:
A Carbon dioxide and water
B Carbon monoxide and oxygen
C Methane and oxygen
D Hydrogen and carbon

The correct answer is:
Carbon dioxide and water

Solution:
In complete combustion, hydrocarbons react with oxygen to form carbon dioxide (CO2) and water (H2O) as the primary products.

Topic: Chemistry, Hydrocarbons, NEET
In compound C, H and N atoms are present in 9 : 1 : 3.5 by weight. Molecular weight of compound is 108. Molecular formula of compound is

Options:
A C2H6N2
B C3H4N
C C6H8N2
D C9H12N3

The correct answer is:
C6H8N2

Solution:
Percentage
R.N.A.
Simplest ratio

C
9
912=34
3

H
1
11=1
4

N
3.5
3.514=14
1

Empirical formula =C3H4N
(C3H4N)n=108,(12Ã3+4Ã1+14)n=108
(54)n=108
n=10854=2
So molecular formula =2ÃC3H4N=C6H8N2

Topic: Chemistry, General Organic Chemistry, NEET
In compounds of formula ECl3 , where E=B, P, As or Bi , the bond angles Cl-E-Cl for different E are in the order

Options:
A B>P=As=Bi
B B>P>As>Bi
C B<P=As=Bi
D B<P<As<Bi

The correct answer is:
B>P>As>Bi

Solution:
B>P>As>Bi
As we go down the group bond angle decreases because repulsion between bonded pairs of electron decreases.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
In concentrated alkali metal solutions in liquid ammonia, what color does the solution change to?

Options:
A Red
B Green
C Bronze
D Purple

The correct answer is:
Bronze

Solution:
In concentrated alkali metal solutions in liquid ammonia, the blue color changes to bronze.

Topic: Chemistry, s Block Elements, NEET
In contact process the formation of SO3 takes place according to the following reaction,
2SO2+O2⇌2SO3;ΔH=-45.2kcal
The formation of SO3 is favoured by

Options:
A Increase of volume
B Increasing in temperature
C Removal of oxygen
D Increasing of pressure

The correct answer is:
Increasing of pressure

Solution:
In this reaction ΔH is negative so reaction move forward by decrease in temperature while value of Δn=2-3=-1 i.e., negative so the reaction move forward by increase in pressure.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
In context with beryllium, which one of the following statements is incorrect.

Options:
A It is rendered passive by nitric acid
B It forms Be2C
C Its salts rarely hydrolyze
D Its hydride is electron - deficient and polymeric

The correct answer is:
Its salts rarely hydrolyze

Solution:
Salts of beryllium are readily hydrolyzed due to the presence of vacant p-orbital. So, given option is incorrect statement. All other statements are correct. It is rendered passive by nitric acid. It forms beryllium carbide. And its hydride is electron deficient with formula BeH2.

Topic: Chemistry, s Block Elements, NEET, NEET 2016 (Phase 2)
In context with the transition elements, which of the following statement is incorrect?

Options:
A In the highest oxidation states, the transition metals show basic character and form cationic complexes.
B In the highest oxidation states of the first five transition element [Sc to Mn], all the 4s and 3d electrons are used for bonding.
C Once the d5 configuration is exceeded, the tendency to involve all the 3d electrons in bonding decreases.
D In addition to the normal oxidation states, the zero-oxidation state is also shown by these elements in complex.

The correct answer is:
In the highest oxidation states, the transition metals show basic character and form cationic complexes.

Solution:
As in higher Oxidation states transition elements show acidic nature for example V2O5,CrO3 . Rest of the other statements given here are correct features of these elements.

Topic: Chemistry, d and f Block Elements, NEET
In contrast to annelids, the Platyhelminthes show

Options:
A Radial symmetry
B Presence of pseudocoel
C Bilateral symmetry
D Absence of body cavity

The correct answer is:
Absence of body cavity

Solution:
The Platyhelminthes do not have a body cavity, simple bilaterian, unsegmented, soft-bodied invertebrates. Unlike other bilaterians, they are acoelomates (having no body cavity), and have no specialized circulatory and respiratory organs, which restricts them to having flattened shapes that allow oxygen and nutrients to pass through their bodies by diffusion. The digestive cavity has only one opening for both ingestion (intake of nutrients) and egestion (removal of undigested wastes); as a result, the food cannot be processed continuously.

Topic: Biology, Animal Kingdom, NEET
In contrast to Annelids, the Platyhelminths show:

Options:
A absence of body cavity
B bilateral symmetry
C radial symmetry
D presence of pseudocoel.

The correct answer is:
absence of body cavity

Solution:

Topic: Biology, Animal Kingdom, NEET, NEET 2005
In contrast to Annelids the Platyhelminths show:

Options:
A absence of body cavity.
B bilaterial symmetry.
C radial symmetry.
D presence of eucoelom.

The correct answer is:
absence of body cavity.

Solution:
Platyhelminthes include flatworms. There is no body cavity. The animals are therefore acoelomates. Annelids also have bilateral symmetry. They are coelomate having a perivisceral cavity divided into compartments.

Topic: Biology, Animal Kingdom, NEET
In conversion of limestone to lime,

CaCO3sâCaOs+CO2(g)

the values of âHÂ° and âSÂ° are +179.1 KJ/mol ,160.2J/K respectively at 298 K and 1 bar. Assuming that âHÂ° and âSÂ° do not change with temperature, temperature above which conversion of limestone to lime will be spontaneous is

Options:
A 1008 K
B 1200 K
C 845 K
D 1118 K

The correct answer is:
1118 K

Solution:
âS=âHT
âS=160.2 J/K
âH=179.1Ã103 J/mol
T=179.1Ã103 J/mol160.2 J/K=1117.97 K=1118 K

Topic: Chemistry, Thermodynamics (C), NEET
In Coordination Chemistry, why is it important to have a systematic method of naming compounds?

Options:
A To make the names more artistic
B To confuse researchers
C To ensure that names are in Latin
D To avoid confusion and facilitate communication

The correct answer is:
To avoid confusion and facilitate communication

Solution:
A systematic method of naming compounds in Coordination Chemistry is essential to avoid confusion and enable effective communication among researchers.

Topic: Chemistry, Coordination Compounds, NEET
In coordination compound nomenclature, what is the name of the cationic part of the compound?

Options:
A Coordination sphere
B Central atom/ion
C Counter ion
D Ligand

The correct answer is:
Counter ion

Solution:
In coordination compound nomenclature, the name of the cationic part of the compound is the "counter ion."

Topic: Chemistry, Coordination Compounds, NEET
In coordination compound nomenclature, what is used to indicate the oxidation state of the metal in a complex?

Options:
A A Roman numeral in parenthesis
B A Greek letter
C A numerical subscript
D A chemical symbol

The correct answer is:
A Roman numeral in parenthesis

Solution:
In coordination compound nomenclature, the oxidation state of the metal in a complex is indicated by a Roman numeral in parenthesis following the name of the coordination entity.

Topic: Chemistry, Coordination Compounds, NEET
In coordination compounds of the first transition series, what is the common hybridization for metal ions with up to three 3d electrons?

Options:
A sp2
B sp3
C dsp2
D d2sp3

The correct answer is:
dsp2

Solution:
Metal ions with up to three 3d electrons commonly exhibit dsp2 hybridization in coordination compounds.

Topic: Chemistry, Coordination Compounds, NEET
In coordination compounds, what are the ions outside the square bracket called?

Options:
A Complexes
B Coordination entities
C Counter ions
D Neutral molecules

The correct answer is:
Counter ions

Solution:
The ions outside the square bracket in coordination compounds are called counter ions.

Topic: Chemistry, Coordination Compounds, NEET
In coordination compounds, what is the role of ligands?

Options:
A They serve as counter ions.
B They act as Lewis acids.
C They bind to the central atom/ion.
D They are the central atoms/ions.

The correct answer is:
They bind to the central atom/ion.

Solution:
Ligands in coordination compounds bind to the central atom/ion.

Topic: Chemistry, Coordination Compounds, NEET
In coordination compounds, what is the term used for the species within the square bracket?

Options:
A Coordination polyhedra
B Counter ions
C Complexes
D Ligands

The correct answer is:
Complexes

Solution:
The species within the square bracket in coordination compounds are referred to as complexes.

Topic: Chemistry, Coordination Compounds, NEET
In corn, the trait for a tall plant (T) is dominant to the trait for a dwarf plant (t) and the trait for coloured kernels (C) is dominant to the trait for white kernels (c). In a particular cross of corns, probability of white kernels is 0.25 and the probability of a kernel being coloured is 0.75. Which of the following most probably represents the parental genotypes?

Options:
A TtCc × TtCc
B TtCc × ttCc
C TtCc × ttcc
D TTCc × ttCc

The correct answer is:
TtCc × ttCc

Solution:
Out of 8 plants, 6 plants have coloured kernals 2 plants have coloured / white kernal. So the genotype of plants will be TtCc and ttCc.

Topic: Biology, Principles of Inheritance and Variation, NEET
In Cr –atom the number of 3d-electron having spin quantum number, s = +1/2 are

Options:
A 10
B 5
C 2
D 1

The correct answer is:
5

Solution:
The electronic configuration of Cr is given as
Cr (24) = (Ar) 3d54s1

All the five electrons are 3d-orbitals have parallel spin (s = +1/2).

Topic: Chemistry, Structure of Atom, NEET
In Cr₂O₇²⁻ (dichromate ion), the oxidation number of chromium is:

Options:
A +2
B +4
C +6
D +8

The correct answer is:
+6

Solution:
Correct Option is : (C)
+6

Topic: Chemistry, Redox Reactions, NEET
In cryosurgery, liquid dinitrogen is used to:

Options:
A Destroy abnormal or diseased tissue.
B Preserve biological materials and food items.
C Provide an inert atmosphere.
D Manufacture ammonia and other industrial chemicals.

The correct answer is:
Destroy abnormal or diseased tissue.

Solution:
The paragraph states that liquid dinitrogen is used in cryosurgery to destroy abnormal or diseased tissue. Cryosurgery is a procedure that uses extreme cold to destroy tissue.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
In crystallization, what state is the pure compound in when it crystallizes out?

Options:
A Vapor
B Solid
C Liquid
D Gas

The correct answer is:
Solid

Solution:
In crystallization, the pure compound crystallizes out in the solid state.

Topic: Chemistry, General Organic Chemistry, NEET
In curing cement plasters water is sprinkled from time to time. This helps in

Options:
A keeping it cool
B developing interlocking needle-like crystals of hydrated silicates
C hydrating sand and gravel mixed with cement
D converting sand into silicic acid

The correct answer is:
developing interlocking needle-like crystals of hydrated silicates

Solution:
Water develops interlocking needle-like crystals of hydrated silicates. The reactions involved are the hydration of calcium aluminates and calcium silicates which change into their colloidal gels. At the same time, some calcium hydroxide and aluminium hydroxides are formed as precipitates due to hydrolysis. Calcium hydroxide binds the particles of calcium silicates together while aluminium hydroxide fills the interstices rendering the mass impervious.

Topic: Chemistry, s Block Elements, NEET
In curved-arrow notation, what does a single-barbed 'fish hook' arrow represent?

Options:
A The movement of an entire molecule
B The transfer of a single electron
C The reaction mechanism
D The temperature of the reaction

The correct answer is:
The transfer of a single electron

Solution:
The paragraph explains that a single-barbed 'fish hook' arrow in curved-arrow notation represents the movement of a single electron.

Topic: Chemistry, General Organic Chemistry, NEET
In d4 coordination entities, what determines whether the fourth electron enters an eg orbital or a t2g orbital?

Options:
A The ligand's field strength
B The metal ion's charge
C The number of ligands
D The metal's position in the periodic table

The correct answer is:
The ligand's field strength

Solution:
Whether the fourth electron in a d4 coordination entity enters an eg orbital or a t2g orbital depends on the relative magnitude of the crystal field splitting (Do) and the pairing energy (P), which is influenced by the ligand's field strength.

Topic: Chemistry, Coordination Compounds, NEET
In Daniel cell, electrodes are-

Options:
A Zinc,Sulphur
B Zinc,Copper
C Silver,Copper
D Nickel,Sulphur

The correct answer is:
Zinc,Copper

Solution:
Correct Option is : 2
Zinc,Copper

Topic: Chemistry, Electrochemistry, NEET
In Darwin's theory of evolution what is the reason for the change in population characteristics over time?

Options:
A Mutations
B Adaptation
C Inheritable variations
D Large differences arising suddenly in a population

The correct answer is:
Inheritable variations

Solution:
In Darwin's theory of evolution, the change in population characteristics over time is due to inheritable variations that make resource utilization better for a few (adapted to the habitat better) will enable only those to reproduce and leave more progeny.

Topic: Biology, Evolution, NEET
In Î± decay the kinetic energy of Î± particle is 48 MeV and Q value of the reaction is 50 MeV. The mass number of the mother nucleus is (Assume that the daughter nucleus is in the ground state)

Options:
A 96
B 100
C 104
D none of these

The correct answer is:
100

Solution:
Let KÎ± is kinetic energy of Î± particle and Kd is the kinetic energy of the daughter nucleus.
Let A be the mass number of mother nucleus then the mass number of the daughter nucleus is A-4.
From the conservation of momentum
KÎ±Kd=p2242A-4p2
KÎ±Kd=A-44
Kd=4A-4KÎ±
Q value =KÎ±+Kd
50=48+4A-448
2=4A-448
A-4=96
A=100

Topic: Physics, Nuclear Physics, NEET
In dehydrohalogenation, from which carbon atom is the hydrogen atom eliminated to form an alkene?

Options:
A Alpha carbon
B Beta carbon
C Gamma carbon
D Delta carbon

The correct answer is:
Beta carbon

Solution:
Dehydrohalogenation involves the elimination of a hydrogen atom from the beta carbon, which is the carbon atom next to the carbon to which the halogen is attached.

Topic: Chemistry, Hydrocarbons, NEET
In dehydrohalogenation, the rate of reaction is primarily influenced by the nature of which group?

Options:
A Alkyl group
B Halogen atom
C Solvent
D Catalyst

The correct answer is:
Alkyl group

Solution:
The rate of dehydrohalogenation reaction is primarily influenced by the nature of the alkyl group.

Topic: Chemistry, Hydrocarbons, NEET
In dehydrohalogenation, which type of halogen atom is the least reactive?

Options:
A Iodine
B Bromine
C Chlorine
D Fluorine

The correct answer is:
Fluorine

Solution:
Fluorine is the least reactive among halogen atoms in dehydrohalogenation reactions.

Topic: Chemistry, Hydrocarbons, NEET
In diborane the two H-B-H angles are nearly

Options:
A 60°,120°
B 97°,120°
C 95°,150°
D 120°,180°

The correct answer is:
97°,120°

Solution:
In diborane the two H-B-H angles are nearly 97°,120°

Topic: Chemistry, p Block Elements (Group 13 & 14), NEET
In dicot plants, after triple fusion, the central cell and zygote would develop into, respectively:

Options:
A Endosperm and embryo
B Seed and endosperm
C Seed and embryo
D Embryo and endosperm

The correct answer is:
Endosperm and embryo

Solution:
The central cell after triple fusion becomes the primary endosperm cell (PEC) and develops into the endosperm while the zygote develops into an embryo. Mostly the zygote develops only after certain amount of endosperm is formed to ensure that nutrition will be provided for the developing embryo.
The embryo develops at the micropylar end of the ovule. Dicot plants have 2 cotyledons and an embryoal axis. The portion above the cotyledons is called the epicotyl, it terminates with the plumule. The portion below the cotyledons is called the hypocotyl and terminates with the radicle and root cap.
After the embryo develops the root grows towards the micropylar end, while the plumule grows towards the chalazal end
The stages of embryogeny in a dicotyledonous embryo. The zygote gives rise to the pre-embryo and subsequently to the globular, heart-shaped and mature embryo.
In the dicot stem the embryo consists of an embryonal axis, two cotyledons, Pulmule, radical or root tip. The root tip is covered with root cap.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
In dicot root, the vascular cambium originates from

Options:
A tissue located below the phloem bundles and a portion of pericycle tissue above protoxylem
B cortical region
C parenchyma between endodermis and pericycle
D intrafascicular and interfascicular tissue in a ring

The correct answer is:
tissue located below the phloem bundles and a portion of pericycle tissue above protoxylem

Solution:
In dicot root, the vascular cambium originates from tissues located below the phloem bundles and a portion of pericycle tissue above protoxylem.
Vascular cambium is the meristematic layer that is responsible for cutting off vascular tissues (xylem and phloem). In young stem, it is present in patches as a single layer between the xylem and phloem.

Topic: Biology, Anatomy of Flowering Plants, NEET, NEET 2019 (Odisha)
In dilute solutions (< 0.01 M), what is the relationship between the activity of hydrogen ions (H+) and molarity ([H+])?

Options:
A Activity of hydrogen ion is always greater than molarity.
B Activity of hydrogen ion is always less than molarity.
C Activity of hydrogen ion is equal in magnitude to molarity.
D Activity of hydrogen ion has no relationship with molarity.

The correct answer is:
Activity of hydrogen ion is equal in magnitude to molarity.

Solution:
In dilute solutions (< 0.01 M), the activity of hydrogen ions (H+) is equal in magnitude to the molarity ([H+]).

Topic: Chemistry, Ionic Equilibrium, NEET
In distillation, what property of liquids is exploited to separate them?

Options:
A Their color
B Their viscosity
C Their density
D Their boiling points

The correct answer is:
Their boiling points

Solution:
Distillation exploits the difference in boiling points of liquids to separate them.

Topic: Chemistry, General Organic Chemistry, NEET
In DNA and RNA, nitrogen atom is present in the ring system. Can Kjeldahl method be used for the estimation of nitrogen present in these? Give reasons.

Options:
A Yes, because the Kjeldahl method can accurately estimate nitrogen in all nitrogen-containing compounds.
B Yes, but with modifications, as DNA and RNA require a special sample preparation process.
C No,DNA and RNA have nitrogen in the heterocyclic rings. Nitrogen present in rings, azo groups and nitro groups cannot be removed as ammonia.
D No, because DNA and RNA do not contain nitrogen atoms.

The correct answer is:
No,DNA and RNA have nitrogen in the heterocyclic rings. Nitrogen present in rings, azo groups and nitro groups cannot be removed as ammonia.

Solution:
Correct Option is : (C)
No,DNA and RNA have nitrogen in the heterocyclic rings. Nitrogen present in rings, azo groups and nitro groups cannot be removed as ammonia.

Topic: Chemistry, General Organic Chemistry, NEET
In DNA fingerprinting, the 'probe' refers to ___________

Options:
A a radioactively labeled single-stranded DNA molecule
B a radioactively labeled single-stranded protein molecule
C a radioactively labeled double-stranded RNA molecule
D a radioactively labeled double-stranded DNA molecule

The correct answer is:
a radioactively labeled single-stranded DNA molecule

Solution:
For DNA fingerprinting special single-stranded DNA, probes are made in the laboratory. DNA probes contain repeated sequences of bases complementary to those on VNTRs. These probes are made radioactive by labeling with radioactive isotopes. This step helps in detecting DNA fingerprints or a variable number of tandem repeats (VNTRs).

Topic: Biology, Biotechnology - Principles and Processes, NEET
In DNA molecule, which of the following base pair is present?

Options:
A Cytosine and adenine
B Adenine and thymine
C Adenine and guanine
D Cytosine and thymine

The correct answer is:
Adenine and thymine

Solution:
Adenine base pairs with thymine and guanine with cytosine. This base pairing is in accordance with Chargaff’s base rule.

Topic: Chemistry, Biomolecules, NEET
In DNA, the complimentary bases are

Options:
A Adenine and thymine; guanine and cytosine
B Adenine and thymine; guanine and uracil
C Adenine and guanine, thymine and cytosine
D Uracil and adenine; cytosine and guanine

The correct answer is:
Adenine and thymine; guanine and cytosine

Solution:
Deoxyribonucleic acid (DNA) has the purine bases adenine and guanine and pyrimidine bases thymine and uracil According to base pairing rule adenine paired with thymine $(A=T)$ and cytosine paired with guanine $(\mathrm{C} \equiv \mathrm{G})$.

Topic: Chemistry, Chemical Kinetics, NEET, NEET 2008 (Screening)
In DNA the linkages between different nitrogenous bases are:

Options:
A phosphate linkage
B H-bonding
C glycosidic linkage
D peptide linkage

The correct answer is:
H-bonding

Solution:
In DNA, the linkages between different nitrogenous base are H-bonding.

Topic: Chemistry, Biomolecules, NEET, NEET 2013 (Karnataka)