datavorous/entrance-exam-dataset huggingface dataset:
Explain why the OH group in phenols more strongly held as compared to OH group in alcohols.

Options:
A because the OH group in phenols exhibits resonance stabilization,so the C-OH bond acquires the partial double bond character and hence the bond in phenol becomes shorter and stronger than C-OH bond in alcohol
B because the OH group in phenols has a higher electron density compared to alcohols.
C because the OH group in phenols forms stronger hydrogen bonds than alcohols.
D because the OH group in phenols is more basic than alcohols.

The correct answer is:
because the OH group in phenols exhibits resonance stabilization,so the C-OH bond acquires the partial double bond character and hence the bond in phenol becomes shorter and stronger than C-OH bond in alcohol

Solution:
Correct Option is : (A)
because the OH group in phenols exhibits resonance stabilization,so the C-OH bond acquires the partial double bond character and hence the bond in phenol becomes shorter and stronger than C-OH bond in alcohol

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
Explain why there is a phenomenal decrease in ionization enthalpy from carbon to silicon?

Options:
A The increase in electron shielding and atomic radius from carbon to silicon leads to a decrease in the effective nuclear charge experienced by outermost electrons, making it easier to remove an electron.
B The electron-electron repulsion in the outermost shell increases from carbon to silicon, reducing the ionization enthalpy.
C Silicon has more unpaired electrons in its outer shell compared to carbon, making it easier to remove an electron.
D The presence of d-orbitals in silicon allows for greater electron delocalization, resulting in a lower ionization enthalpy compared to carbon.

The correct answer is:
The increase in electron shielding and atomic radius from carbon to silicon leads to a decrease in the effective nuclear charge experienced by outermost electrons, making it easier to remove an electron.

Solution:
Correct Option is : (A)
The increase in electron shielding and atomic radius from carbon to silicon leads to a decrease in the effective nuclear charge experienced by outermost electrons, making it easier to remove an electron.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Exploitation of bioresources of a nation by multinational companies without authorisation from the concerned country is referred to as

Options:
A bioweapon
B biopiracy
C bioethics
D biowar

The correct answer is:
biopiracy

Solution:
Exploitation of bioresources of a nation by multinational companies without authorisation from concerned country is referred to as biopiracy. For example, a patent granted in USA covers the entire basmati rice germplasm of our country.

Topic: Biology, Biotechnology and Its Applications, NEET, NEET 2019 (Odisha)
Exploration of molecular, genetic and species level diversity for novel products of economic importance is known as

Options:
A biopiracy
B bioenergetics
C bioremediation
D bioprospecting

The correct answer is:
bioprospecting

Solution:
Exploration of molecular, genetic and species level diversity for novel products of economic importance is known as bioprospecting. Biopiracy refers to illegal use of bioresources.
Bioremediation is use of organisms to clean up contamination during waste treatment.
Bioenergetics deals with energy metabolism in living organisms.

Topic: Biology, Biodiversity and its Conservation, NEET, NEET 2019 (Odisha)
Explosion of population in India is due to

Options:
A Decreased mortality
B Illiteracy
C Increased natality
D All of the above

The correct answer is:
All of the above

Solution:
Population explosion in India is due to climate, illiteracy, increased natality, early marriage, religious beliefs, better health care, and decreased mortality.

Topic: Biology, Reproductive Health, NEET
Exponential growth can be expressed as

Options:
A W1=W0ert
B W0=W1ert
C W1=W0eΔrt
D W0=W1eΔrt

The correct answer is:
W1=W0ert

Solution:
Exponential growth: When the growth takes place rapidly at a very high rate.
It is also called the log phase, in exponential growth phase the cells divide mitotically and keep on dividing, therefore it is known as the exponential phase. It is expressed as :
W1=W0ert , where W1 is the final size and W0 is the initial size of the plant, r is the growth rate, t is the time of growth and e is the base of logarithms.

Topic: Biology, Organisms and Populations, NEET
Express the change in internal energy of a system when no heat is absorbed by the system from the surroundings, but work (w) is done on the system. What type of wall does the system have?

Options:
A ∆U=q+w
B ∆U= -q
C ∆U = wad
D ∆U=q

The correct answer is:
∆U = wad

Solution:
Correct Option is : (C)
∆U = wad

Topic: Chemistry, Thermodynamics (C), NEET
Express the change in internal energy of a system when no work is done on the system, but q amount of heat is taken out from the system and given to the surroundings. What type of wall does the system have?

Options:
A ∆U=q+w
B ∆U= -q
C ∆U = wad
D ∆U=q

The correct answer is:
∆U= -q

Solution:
Correct Option is : (B)
∆U= -q

Topic: Chemistry, Thermodynamics (C), NEET
Express the change in internal energy of a system when w amount of work is done by the system and q amount of heat is supplied to the system. What type of system would it be?

Options:
A ∆U=q+w
B ∆U= -q
C ∆U = wad
D ∆U=q-w

The correct answer is:
∆U=q-w

Solution:
Correct Option is : (D)
∆U=q-w

Topic: Chemistry, Thermodynamics (C), NEET
Express the following in the scientific notation: (i) 0.0048 and (ii) 234,000

Options:
A (i) 2.34×105and (ii) 4.8×10–3
B (i)0.48 and (ii) 0.234000
C (i) 4.8×10–3and (ii) 2.34×105
D (i)3.45×105and (ii) 2.56×10–3

The correct answer is:
(i) 4.8×10–3and (ii) 2.34×105

Solution:
Correct Option is : (C)
(i) 4.8×10–3and (ii) 2.34×105

Topic: Chemistry, Some Basic Concepts of Chemistry, NEET
Express the following in the scientific notation: (i) 8008 (ii) 500.0 (iii) 6.0012

Options:
A (i) 80.08 ×102(ii) 50.00 × 10 and (iii) 60.012
B (i) 8.008 ×103(ii) 5.000 × 102and (iii) 6.0012
C (i) 800.8 ×10 (ii) 5000 × 102and (iii) 600.12
D (i) 800.8 ×103(ii) 5.000 × 102and (iii) 6001.2

The correct answer is:
(i) 8.008 ×103(ii) 5.000 × 102and (iii) 6.0012

Solution:
Correct Option is : (B)
(i) 8.008 ×103(ii) 5.000 × 102and (iii) 6.0012

Topic: Chemistry, Some Basic Concepts of Chemistry, NEET
Expressed sequence tags (ESTs) refers to:

Options:
A The sequences that are synthesized from the mRNA
B Polypeptide expression
C DNA Polymorphism
D The novel DNA sequences

The correct answer is:
The sequences that are synthesized from the mRNA

Solution:
ESTs are short cDNA sequences, that are synthesized from the mRNA and used to identify gene transcripts. These sequences are used in gene discovery and in gene-sequence determination (Human genome project).

Topic: Biology, Molecular Basis of Inheritance, NEET, NEET 2019 (All India)
Expressed Sequence Tags (ESTs) refers to

Options:
A Certain important expressed genes.
B All genes that are expressed as RNA.
C All genes that are expressed as proteins.
D All genes whether expressed or unexpressed.

The correct answer is:
All genes that are expressed as RNA.

Solution:
Expressed Sequence Tags (ESTs) are DNA sequences (genes) that are expressed as mRNA for protein synthesis. These are used in the human genome project for gene mapping. ESTs provide adequate knowledge to allow specific probes to be developed for DNA microarrays that can then be used to establish profiles of gene expression.

Topic: Biology, Molecular Basis of Inheritance, NEET, NEET 2023 (All India)
Expressed sequence tags (ESTs) refers to:

Options:
A the sequences that are synthesized from the mRNA
B polypeptide expression
C DNA Polymorphism
D the novel DNA sequences

The correct answer is:
the sequences that are synthesized from the mRNA

Solution:
ESTs are short cDNA sequences, that are synthesized from the mRNA and used to identify gene transcripts. These sequences are used in gene discovery and in gene-sequence determination (Human genome project).

Topic: Biology, Molecular Basis of Inheritance, NEET
Extension of plasma membrane in prokaryotic cell is:

Options:
A mesosome
B nucleoid
C ribosome
D none of these

The correct answer is:
mesosome

Solution:
In prokaryotes, the cell membrane is infolded into small projection known as mesosomes. These are infoldings that increase the surface area of the membrane for attachment of respiratory chain complex, helps in DNA replication and separation of replicated DNA, and septa formation during cell division.

Topic: Biology, Biological Classification, NEET
Extensive properties depend on the quantity of matter but intensive properties do not. Which of the following properties are extensive? Mass, internal energy, pressure, heat capacity, molar heat capacity, density, mole fraction, specific heat, temperature and molarity.

Options:
A Mass, Internal energy, Density are extensive properties
B Mass, Internal energy, Heat capacity are extensive properties
C Mass, Temperature, Heat capacity are extensive properties
D Molarity, Mole fraction, Heat capacity are extensive properties

The correct answer is:
Mass, Internal energy, Heat capacity are extensive properties

Solution:
Correct Option is : (B)
Mass, Internal energy, Heat capacity are extensive properties

Topic: Chemistry, Thermodynamics (C), NEET
External respiration occurs in the ____________ and internal respiration occurs in the _________________.

Options:
A Lungs and blood capillaries
B Lungs and metabolizing tissues
C Nasal chamber and trachea
D Alveoli and blood capillaries

The correct answer is:
Lungs and metabolizing tissues

Solution:
External respiration occurs in the lungs where oxygen diffuses into the blood and carbon dioxide diffuses into the alveolar air. Internal respiration occurs in the metabolizing tissues, where oxygen diffuses out of the blood and carbon dioxide diffuses out of the cells.

Topic: Biology, Breathing and Exchange of Gases, NEET
Extraction of gold and silver involves leaching with CN- ion. Silver is later recovered by:

Options:
A Liquation
B Distillation
C Zone refining
D Displacement with Zn

The correct answer is:
Displacement with Zn

Solution:
Zn being more reactive than Ag and Au, displaces them.
From Native ore,
4 Ag + 8 NaCN + 2 H 2 O + O 2 → Leaching 4 Na Ag CN 2 + 4 NaOH Soluble Sodium dicyanoargentate (I)
2 Na Ag CN 2 + Zn → Displacement Na 2 Zn CN 4 + 2 Ag ↓

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
Extraction of gold and silver involves leaching with CN- ion. Silver or gold is later recovered by:

Options:
A Liquation
B Distillation
C Zone refining
D Displacement with Zn

The correct answer is:
Displacement with Zn

Solution:
Zinc metal can displace Ag and Au as Zn being more reactive than Ag and Au. The following reactions are involved in the extraction of gold or silver from their native ores.
From Native ore,
4 Ag + 8 NaCN + 2 H 2 O + O 2 → Leaching 4 Na Ag CN 2 + 4 NaOH Soluble Sodium dicyanoargentate (I)
2 Na Ag CN 2 + Zn → Displacement Na 2 Zn CN 4 + 2 Ag ↓

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET, NEET 2017
Extraction of zinc from zinc blende is achieved by

Options:
A roasting followed by reduction with another metal
B electrolytic reduction
C roasting followed by reduction with carbon
D roasting followed by self-reduction

The correct answer is:
roasting followed by reduction with carbon

Solution:
Extraction of Zinc from Zinc blende is achieved by roasting followed by reduction with carbon as follows
ZnS+32O2→ΔZnO+SO2
ZnS+2O2→ΔZnSO4→ΔZnO+SO2+12O2
ZnO+C→ΔZn+CO

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
Extraction of zinc from zinc blende is achieved by

Options:
A Roasting followed by reduction with carbon
B Roasting followed by reduction with another metal
C Electrolytic reduction
D Roasting followed by self-reduction

The correct answer is:
Roasting followed by reduction with carbon

Solution:
Zinc blende contains ZnS which is first roasted partially and then subjected to reduction with carbon.
ZnS+ 3 2 O 2 → ZnO+ SO 2 Roasting
ZnO+C → Δ Zn+CO↑ carbon reduction

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
Extranuclear inheritance is the consequence of presence of genes in:

Options:
A mitochondria and chloroplasts
B endoplasmic reticulum and mitochondria
C ribosomes and chloroplast
D lysosomes and ribosomes.

The correct answer is:
mitochondria and chloroplasts

Solution:
Cytoplasmic inheritance or extranuclear inheritance is the transmission of genes that occur outside the nucleus such as mitochondria and chloroplasts or from cellular parasites like viruses or bacteria.

Topic: Biology, Principles of Inheritance and Variation, NEET, NEET 2004
Extra-terrestrial origin of life was proposed in the theory of

Options:
A spontaneous creation
B special creation
C catastrophism
D panspermia

The correct answer is:
panspermia

Solution:
It is the theory that suggests that life on the earth originated from microorganisms or chemical precursors of life present in outer space, and they were able to initiate life on reaching a suitable environment.

Topic: Biology, Evolution, NEET
Extremities of long bones possess cartilage

Options:
A Calcified
B Fibrous
C Elastic
D Hyaline

The correct answer is:
Hyaline

Solution:
Hyaline cartilage forms the 'cushions' or 'pads' upon the articular surfaces at the joints of long bones and are called as 'articular cartilage'. Its role in adult body is to withstand forces of compression and torsion at the joints.

Topic: Biology, Structural Organisation in Animals, NEET
Exudation and guttation are due to

Options:
A OP
B root pressure
C diffusion pressure
D transpiration pull

The correct answer is:
root pressure

Solution:
Osmotic pressure developed in the cells of roots in the root system is termed as root pressure and this supports in the rise of the cell sap towards the leaves. Root pressure results in exudation and as well as guttation.
Fluid emitted via the roots of the plants are referred to as exudates and the process is called as exudation.
Loss of impure water from plant, generally from the margins of leaves is termed as guttation. The water contains a dilute solution of different organic and inorganic substances. Guttation occurs due to low rate of transpiration and more water absorption. This higher rate of absorption develops root pressure and pushes the excess water out of the specialized pores of veins called hydathodes. Guttation is a type of exudation.

Topic: Biology, Transport in Plants, NEET
$\mathrm{F}_2$ generation in a Mendelian cross showed that both genotypic and phenotypic ratios are same as $1: 2: 1$. It represents a case of

Options:
A codominance
B dihybrid cross
C monohybrid cross with complete dominance
D monohybrid cross with incomplete dominance

The correct answer is:
monohybrid cross with incomplete dominance

Solution:
Monohybrid cross with incomplete dominance shows both genotypic and phenotypic ratio as same $(1: 2: 1)$.
Genotypic ratio -1 (AA) :2(Aa): 1 (aa)
Phenotypic ratio - 1 (Red) : 2 (Pink) : 1 (white)

Topic: Biology, Principles of Inheritance and Variation, NEET, NEET 2012 (Screening)
F can make oxoacid in which of the following states?

Options:
A 0
B +3
C +5
D +1

The correct answer is:
+1

Solution:
Correct Option is : 4
+1

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
F- center is:

Options:
A The electrons trapped in anionic vacancies
B The electrons trapped in cation vacancies
C Non-equivalent sites of stoichiometric compound
D All of the above

The correct answer is:
The electrons trapped in anionic vacancies

Solution:
F- center is electron trapped in anionic vacancies. It is a crystallographic defect also known as color center.

Topic: Chemistry, Solid State, NEET
Fe3+ compounds are more stable than Fe2+ compounds because

Options:
A Fe3+ has smaller size than Fe2+
B Fe3+ has 3d5 configuration (half-filled)
C Fe3+ has higher oxidation state
D Fe3+ is paramagnetic in nature

The correct answer is:
Fe3+ has 3d5 configuration (half-filled)

Solution:
Half filled configuration of Fe3+ (3d5) makes it more stable than Fe2+ (3d6) .

Topic: Chemistry, d and f Block Elements, NEET
FeCl3+ Potassium thiocyanate → product, the colour of this product is

Options:
A Red
B Chocolate colour
C Prussian blue
D Colourless

The correct answer is:
Red

Solution:
When Ferric chloride reacts with potassium thiocynate a blood red colour of Ferric thiocynate is formed
FeCl 3  + KCNS→ Fe(CNS) 3 blood red colour

Topic: Chemistry, d and f Block Elements, NEET
[Fe(NO2)3Cl3] and [Fe(O-NO)3Cl3] are

Options:
A linkage isomers
B geometrical isomers
C optical isomers
D hydrate isomers

The correct answer is:
linkage isomers

Solution:
[Fe(NO2)3Cl3] and [Fe(O-NO)3Cl3] shows linkage isomerism.

Topic: Chemistry, Coordination Compounds, NEET
Fe(OH)3 can be separated from Al(OH)3 by the addition of

Options:
A NaOH solution
B NaCl solution
C Dil. HCl solution
D NH4Cl & NH4OH

The correct answer is:
NH4Cl & NH4OH

Solution:
Due to common ion effect of NH4+ , concentration of OH- decreases, as KspFe(OH)3<KspAl(OH)3 thus Fe(OH)3 get precipitated first.

Topic: Chemistry, Ionic Equilibrium, NEET
FeSO4.7H2O is known as green vitriol, it is shows isomorphism with

Options:
A CaSO4.5H2O
B MnSO4.4H2O
C ZnSO4.7H2O
D CaCl2.2H2O

The correct answer is:
ZnSO4.7H2O

Solution:
Isomorphic compound are those compounds which forms same type of crystals i.e., have similar structure. FeSO4.7H2O is isomorphous with ZnSO4.7H2O .

Topic: Chemistry, d and f Block Elements, NEET
Fpp, Fnn and Fnp are the nuclear forces between proton-proton, neutron-neutron and neutron-proton respectively. Then relation between them is

Options:
A Fpp=Â Fnnâ Fnp
B Fppâ Â Fnn=Fnp
C Fpp= Fnn=Fnp
D Fppâ Â Fnnâ Fnp

The correct answer is:
Fpp= Fnn=Fnp

Solution:
Nuclear force between two particles is independent of charges of particle.
⇒ Fpp =Fnn =Fnp

Topic: Physics, Nuclear Physics, NEET
F. Skoog observed that callus proliferated from the internodal segments of tobacco stem when auxin was supplied with one of the following except :

Options:
A Extract of Vascular tissues
B Coconut milk
C Abscisic acid
D Yeast Extract

The correct answer is:
Abscisic acid

Solution:
F. Skoog observed that from the internodal segments of tobacco stems the callus proliferated only if in addition to auxins the nutrient medium was supplied with the extracts of vascular tissues, yeast extract, coconut milk or DNA. Miller et al. later identified and crystallised the cytokinesis promoting active substance that they termed kinetin.

Topic: Biology, Plant - Growth and Development, NEET, NEET 2024 (Re-NEET)
ΔfU° of formation of CH4 (g) at certain temperature is -393 kJ mol-1 . The value of ΔfH° is

Options:
A zero
B <ΔfU°
C >ΔfU°
D equal to ΔfU°

The correct answer is:
<ΔfU°

Solution:
C(s)+2H2(g)→CH4(g)
Δng=-1
ΔH=ΔU+ΔngRT
Δng=-ve
ΔH<ΔU

Topic: Chemistry, Thermodynamics (C), NEET
Fac-mer isomerism is associated with which one of the following complexes? (M=central metal)

Options:
A [MAA2]
B [MA3B3]
C [MAA3]
D [MABCD]

The correct answer is:
[MA3B3]

Solution:
Fac-mer isomerism is associated with [MA3B3] type complexes.
​

Topic: Chemistry, Coordination Compounds, NEET
Factors affecting KC is -

Options:
A Increasing concentration of the reactant
B Presence of catalyst
C Method of writing balanced equation (or stoichiometry of reaction)
D Time taken by the chemical reaction

The correct answer is:
Method of writing balanced equation (or stoichiometry of reaction)

Solution:
KC depends on the expression that the coefficient of reactants and products in a given balanced equation.

Topic: Chemistry, Chemical Equilibrium, NEET
FAD or FMN is a coenzyme. Which vitamin is incorporated into its structure?

Options:
A Vitamin C
B Vitamin B1
C Vitamin B6
D Vitamin B2

The correct answer is:
Vitamin B2

Solution:
Flavin mononucleotide (FMN), Flavin adenine dinucleotide (FAD) contains riboflavin (vitamin B2).

Topic: Chemistry, Biomolecules, NEET
Failure of segregation of chromatids during cell division results in the gain or loss of chromosomes, this is called as _____.

Options:
A euploidy
B monoploidy
C aneuploidy
D polyploidy

The correct answer is:
aneuploidy

Solution:
When there is the presence of fewer or extra chromosomes than the normal genome number of the species is called aneuploidy (heteroploidy). During the gamete formation process by meiosis, there is a chance the two chromosomes of homologous pair do not separate resulting in one gamete will have an extra chromosome (N + 1) while the other becomes deficient in one chromosome (N-1). This results in aneuploidy. The resulting zygote either will be deficient in chromosomes or has additional chromosomes.
Aneuploidy can also be defined as the presence of an abnormal number of chromosomes in a cell, for example, a human cell having 45 or 47 chromosomes instead of the usual 46.

Topic: Biology, Principles of Inheritance and Variation, NEET
Family Fabaceae differs from Solanaceae and Liliaceae. With respect to the stamens, pick out the characteristics specific to family Fabaceae but not found in Solanaceae or Liliaceae.

Options:
A Epiphyllous and Dithecous anthers
B Diadelphous and Dithecous anthers
C Polyadelphous and epipetalous stamens
D Monoadelphous and Monothecous anthers

The correct answer is:
Diadelphous and Dithecous anthers

Solution:
The pea-family, called Fabaceae is one of the distinct families which has the following floral characters:

There are five sepals with gamosepalous; valvate/imbricate aestivation.

There are five petals, which vexillary aestivation.

There are 10 stamens, in 9+1 bundle (diadelphous), with anther dithecous.

Theres is a superior ovary, mono carpellary, unilocular with many ovules, style single. Placentation is marginal.

Topic: Biology, Morphology of Flowering Plants, NEET, NEET 2023 (All India)
Family planning program was initiated in

Options:
A 1941
B 1951
C 1961
D 1981

The correct answer is:
1951

Solution:
India is amongst the first countries in the world to initiate action plans and programmes at a national level to attain total reproductive health as a social goal. These programme called 'family planning' were initiated in 1951 and were periodically assessed over the past decades.
Improved programmes covering wider reproduction related areas are currently in operation under the popular name 'Reproductive and Child Healthcare (RCH) programmes' creating awareness among people about various reproduction related aspects and providing facilities and support for building up a reproductively healthy society are the major tasks under these programmes.

Topic: Biology, Reproductive Health, NEET
Family planning was initiated in ___(A)___ to attain _____(B)_____ as a social goal.

Options:
A A:1951, B:total reproductive health
B A:1961, B:total reproductive health
C A:1971, B:total mental health
D A:1931, B:total physiological health

The correct answer is:
A:1951, B:total reproductive health

Solution:
To attain total reproductive health as a social goal, the programs called âfamily planningâ were initiated in 1951 and were periodically assessed over the past decades. It includes different contraceptive methods which couples can use to avoid unwanted pregnancies.

Topic: Biology, Reproductive Health, NEET
Family Solanaceae and Convolvulaceae belongs to the order

Options:
A Poales
B Polymoniales
C Diptera
D Dicotichas

The correct answer is:
Polymoniales

Solution:
Family Solanaceae and Convolvulaceae are included in order Polymoniales on the basis of similarities in floral characters. Order being a higher category is the assemblage of families which exhibits a few similar characters.

Topic: Biology, Plant Kingdom, NEET