datavorous/entrance-exam-dataset huggingface dataset:
Exonucleases, a type of nucleases that degrade nucleic acids, remove nucleotides from

Options:
A Within the polynucleotide chain
B End of the polynucleotide chain
C Particular recognition sites on polynucleotide
D End of the polypeptide chain

The correct answer is:
End of the polynucleotide chain

Solution:
Restriction enzymes belong to a larger class of enzymes called nucleases. They are of two types: exonucleases and endonucleases. Exonucleases remove nucleotides from the ends of the DNA, whereas endonucleases make cuts at specific positions within the DNA.

Topic: Biology, Biotechnology - Principles and Processes, NEET
Expand GMO

Options:
A Gene Mixed Organisms
B Genetically Modified Organisms
C Genetic Moved Organisms
D Genes Modifying Organisms

The correct answer is:
Genetically Modified Organisms

Solution:
Genetically Modified Organisms is the full form of GMO.

Topic: Biology, Biotechnology and Its Applications, NEET
Expansion of a gas in vacuum is called free expansion. Calculate the work done and the change in internal energy when 1 litre of ideal gas expands isothermally into vacuum until its total volume is 5 litre?

Options:
A W=∞ and ∆U=0
B W=0 and ∆U=∞
C W=0 and ∆U=0
D W≠0 and ∆U≠0

The correct answer is:
W=0 and ∆U=0

Solution:
Correct Option is : (C)
W=0 and ∆U=0

Topic: Chemistry, Thermodynamics (C), NEET
Expected children of a blue-eyed (recessive) woman and brown-eyed (dominant) man who had a blue-eyed mother are likely to be

Options:
A all brown-eyed
B all blue-eyed
C 50% blue-eyed and 50% brown-eyed
D Three blue eyed and one brown eyed

The correct answer is:
50% blue-eyed and 50% brown-eyed

Solution:
Brown eye color (B) is dominant over blue eye color b.
Mother is blue-eyed - bb
Father is brown-eyed and his mother is blue-eyed bb. Thus, the father is heterozygous for brown eyes, Bb The child's eye color probably will be -

B	B

B	Bb	bb

50% blue-eyed and 50% brown-eyed.

Topic: Biology, Principles of Inheritance and Variation, NEET
Experimental proof of theory of chemical evolution of life was given by

Options:
A Hershey and Chose
B Oparin and Haldane
C Urey and Miller
D Alfred Wallace

The correct answer is:
Urey and Miller

Solution:
The theory of chemical evolution was given by the Oparin of Russia and Haldane of England. This is the most acceptable theory for origin of life. They proposed that chemical evolution (inorganic constituents â Formation of diverse non-living organic molecules like RNA, protein, etc.) has resulted in the formation of first life forms. Conditions on earth at that time were - High temperature, volcanic storms and reducing atmosphere containing CH4, NH3, etc.
Experimental proof of the theory of chemical evolution was given by S.L. Miller (American scientist) and Harold Urey in 1953. Similar atmospheric conditions were developed on a laboratory scale - Electric discharge in a closed flask containing CH4, H2, NH3 and water vapour at 800 oC.
Result: Few amino acids were obtained.

Topic: Biology, Evolution, NEET
Experimental verification of 'chromosomal theory of inheritance' was done by ______.

Options:
A The person who united the knowledge of chromosomal
segregation with Mendelian principles.
B The person who discovered linkage in Drosophila melanogaster.
C The person who discovered linkage in Lathyrus odoratus.
D The person who discovered mutation in Oenothera lamarckiana.

The correct answer is:
The person who discovered linkage in Drosophila melanogaster.

Solution:
Thomas Hunt Morgan and his colleagues worked on the sex linked genes of fruit fly Drosophila melanogaster. They showed that the two genes did not segregate independently of each other and F2 progeny ratio differed from the expected 9:3:3:1. Morgan concluded that the genes on same chromosome are linked to each other. Tightly linked genes showed very low recombination and vice versa.

Topic: Biology, Principles of Inheritance and Variation, NEET
Experimental verification of the chromosomal theory of inheritance was done by

Options:
A Sutton
B Boveri
C Morgan
D Mendel

The correct answer is:
Morgan

Solution:
Chromosomal theory of inheritance was independently given by Sutton and Boveri in 1902. The two workers found a close similarity between the transmission of hereditary traits and behavior of chromosomes while passing from generation to the next through the agency of gametes. Sutton united the knowledge of chromosomal segregation with Mendelian principles and called it the chromosomal theory of inheritance. Following the synthesis of ideas, experimental verification of the chromosomal theory of inheritance by Thomas Hunt Morgan and his colleagues led to the discovery of the basis for the variations that sexual reproduction produced. Morgan worked with the tiny fruit flies, which were found very suitable for such studies.

Topic: Biology, Principles of Inheritance and Variation, NEET, NEET 2020 (Phase 1)
Expiration is the result of

Options:
A contraction of internal intercostal muscles.
B relaxation of internal intercostal muscles and diaphragm.
C contraction of external intercostal muscles and relaxation of diaphragm.
D relaxation of external intercostal muscles and diaphragm.

The correct answer is:
relaxation of external intercostal muscles and diaphragm.

Solution:
Mechanism of expiration:
A. Relaxation of the diaphragm and the intercostal muscles → Diaphragm and sternum reach their normal positions.
B. Thoracic volume is reduced and thus the pulmonary volume is also reduced.
C. Decrease in the thoracic volume → Decrease in pulmonary volume → Increase in the intra-pulmonary pressure.
D. Intra-pulmonary pressure more than the atmospheric pressure and the air rushes out (expiration).

Topic: Biology, Breathing and Exchange of Gases, NEET
Expiratory capacity - Inspiratory capacity + X = Functional residual capacity. X in this equation is

Options:
A Residual volume
B Inspiratory reserve volume + Residual volume
C Expiratory reserve volume + Residual volume
D Vital capacity

The correct answer is:
Expiratory reserve volume + Residual volume

Solution:
Expiratory capacity = Expiratory Reserve Volume + Tidal volume.
Inspiratory capacity = Inspiratory Reserve Volume + Tidal volume.
Hence, Expiratory capacity - Inspiratory capacity = Expiratory Reserve Volume + Tidal volume - Inspiratory Reserve Volume - Tidal volume = Expiratory Reserve Volume - Inspiratory Reserve Volume.

Topic: Biology, Breathing and Exchange of Gases, NEET
Explain "Antiferromagnetism" with a suitable example.

Options:
A It is a phenomenon where magnetic moments align in the same direction, creating a strong magnetic field. Example Iron.
B It is a phenomenon where magnetic moments align in opposite directions, canceling out the magnetic field. Example Copper.
C It is a phenomenon where adjacent magnetic moments align in opposite directions, creating no net magnetic field. Example Manganese oxide (MnO).
D It is a phenomenon were materials are neither attracted nor repelled by a magnetic field. Example Plastic.

The correct answer is:
It is a phenomenon where adjacent magnetic moments align in opposite directions, creating no net magnetic field. Example Manganese oxide (MnO).

Solution:
Correct Option is : (C)
It is a phenomenon where adjacent magnetic moments align in opposite directions, creating no net magnetic field. Example Manganese oxide (MnO).

Topic: Chemistry, Solid State, NEET
Explain "Ferrimagnetism" with a suitable example.

Options:
A It is a phenomenon where magnetic moments align in the same direction, creating a strong magnetic field. Example Iron.
B It is a phenomenon where magnetic moments align in opposite directions, canceling out the magnetic field. Example Copper.
C It is a phenomenon where materials are neither attracted nor repelled by a magnetic field. Example Plastic.
D It is a phenomenon where some magnetic moments align in one direction and others in the opposite direction, creating a net magnetic field. Example Magnetite (Fe3O4). Answer for 1.26.3

The correct answer is:
It is a phenomenon where some magnetic moments align in one direction and others in the opposite direction, creating a net magnetic field. Example Magnetite (Fe3O4). Answer for 1.26.3

Solution:
Correct Option is : (D)
It is a phenomenon where some magnetic moments align in one direction and others in the opposite direction, creating a net magnetic field. Example Magnetite (Fe3O4). Answer for 1.26.3

Topic: Chemistry, Solid State, NEET
Explain "Ferromagnetism" with a suitable example.

Options:
A It is a phenomenon where magnetic moments align in the same direction, creating a strong magnetic field. Example Iron.
B It is a phenomenon where magnetic moments align in opposite directions, canceling out the magnetic field. Example Copper.
C It is a phenomenon where materials are neither attracted nor repelled by a magnetic field. Example Plastic.
D It is a phenomenon where magnetic moments are randomly oriented, creating no net magnetic field. Example Glass.

The correct answer is:
It is a phenomenon where magnetic moments align in the same direction, creating a strong magnetic field. Example Iron.

Solution:
Correct Option is : (A)
It is a phenomenon where magnetic moments align in the same direction, creating a strong magnetic field. Example Iron.

Topic: Chemistry, Solid State, NEET
Explain how does the –OH group attached to a carbon of benzene ring activate it towards electrophilic substitution?

Options:
A In the presence of attacking electrophile, -OH group exerts +R effect on the benzene ring. So, electron density in the ring increases particularly at the ortho and para positions. When an electrophile attacks, substitution takes place readily at these (o and p-) positions.
B The -OH group withdraws electron density from the benzene ring, making it more electrophilic.
C The -OH group forms strong covalent bonds with the benzene ring, increasing its stability.
D The -OH group neutralizes the benzene ring, making it less reactive towards electrophilic substitution.

The correct answer is:
In the presence of attacking electrophile, -OH group exerts +R effect on the benzene ring. So, electron density in the ring increases particularly at the ortho and para positions. When an electrophile attacks, substitution takes place readily at these (o and p-) positions.

Solution:
Correct Option is : (A)
In the presence of attacking electrophile, -OH group exerts +R effect on the benzene ring. So, electron density in the ring increases particularly at the ortho and para positions. When an electrophile attacks, substitution takes place readily at these (o and p-) positions.

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
Explain, how is the electronegativity of carbon atoms related to their state of hybridisation in an organic compound?

Options:
A Electronegativity decreases with increasing ‘s’ character. sp3> sp2> sp
B Electronegativity increases with increasing ‘s’ character. sp3< sp2< sp
C Electronegativity does not get affected with changing ‘s’ charachter
D None of the above

The correct answer is:
Electronegativity increases with increasing ‘s’ character. sp3< sp2< sp

Solution:
Correct Option is : (B)
Electronegativity increases with increasing ‘s’ character. sp3< sp2< sp

Topic: Chemistry, General Organic Chemistry, NEET
Explain how much portion of an atom located at a corner of a cubic unit cell is part of its neighbouring unit cell.

Options:
A 1/4
B 1/8
C 1/2
D 1

The correct answer is:
1/8

Solution:
Correct Option is : (B)
1/8

Topic: Chemistry, Solid State, NEET
Explain how much portion of an atom located at the body-centre of a cubic unit cell is part of its neighbouring unit cell.

Options:
A 1/4
B 1/8
C 1/2
D 1

The correct answer is:
1

Solution:
Correct Option is : (D)
1

Topic: Chemistry, Solid State, NEET
Explain how rusting of iron is envisaged as setting up of an electrochemical cell.

Options:
A Iron acts as the cathode and oxygen as the anode.
B Iron acts as the anode and oxygen as the cathode.
C Iron and oxygen both act as anodes.
D Iron and oxygen both act as cathodes.

The correct answer is:
Iron acts as the anode and oxygen as the cathode.

Solution:
Correct Option is : (B)
Iron acts as the anode and oxygen as the cathode.

Topic: Chemistry, Electrochemistry, NEET
Explain how vacancies are introduced in an ionic solid when a cation of higher valence is added as an impurity in it.

Options:
A The higher valence cation occupies a tetrahedral void, creating an anionic vacancy.
B The higher valence cation occupies an octahedral void, creating a cationic vacancy.
C The higher valence cation replaces a lower valence cation in the lattice, creating cationic vacancies.
D The higher valence cation replaces an anion in the lattice, creating anionic vacancies.

The correct answer is:
The higher valence cation replaces a lower valence cation in the lattice, creating cationic vacancies.

Solution:
Correct Option is : (C)
The higher valence cation replaces a lower valence cation in the lattice, creating cationic vacancies.

Topic: Chemistry, Solid State, NEET
Explain "Paramagnetism" with a suitable example.

Options:
A It is a phenomenon where magnetic moments align in the same direction, creating a strong magnetic field. Example Iron.
B It is a phenomenon where magnetic moments align in opposite directions, canceling out the magnetic field. Example Copper.
C It is a phenomenon where materials are neither attracted nor repelled by a magnetic field. Example Plastic.
D It is a phenomenon where materials become weakly attracted to a magnetic field. Example Aluminum.

The correct answer is:
It is a phenomenon where materials become weakly attracted to a magnetic field. Example Aluminum.

Solution:
Correct Option is : (D)
It is a phenomenon where materials become weakly attracted to a magnetic field. Example Aluminum.

Topic: Chemistry, Solid State, NEET
Explain the cleansing action of soaps. (i) Soaps have a hydrophilic head that attracts water and a hydrophobic tail that attaches to oil and grease. (ii) When soap is applied to a surface with dirt, the hydrophobic tails surround and lift away the dirt particles. (iii) The soap forms micelles with the dirt particles, allowing them to be easily rinsed away.

Options:
A Only (i) and (ii) are correct.
B Only (ii) and (iii) are correct.
C Only (i) and (iii) are correct.
D All of the above are correct.

The correct answer is:
All of the above are correct.

Solution:
Correct Option is : (D)
All of the above are correct.

Topic: Chemistry, Chemistry in Everyday Life, NEET
Explain the difference between instantaneous rate of a reaction and average rate of a reaction.

Options:
A Instantaneous rate and average rate are identical concepts.
B Instantaneous rate represents the rate of a reaction at a single moment, while average rate represents the rate over a longer time interval.
C Instantaneous rate and average rate both describe the reaction's final state.
D Instantaneous rate provides information about reactants, while average rate provides information about products.

The correct answer is:
Instantaneous rate represents the rate of a reaction at a single moment, while average rate represents the rate over a longer time interval.

Solution:
Correct Option is : (B)
Instantaneous rate represents the rate of a reaction at a single moment, while average rate represents the rate over a longer time interval.

Topic: Chemistry, Chemical Kinetics, NEET
Explain the difference in magnetic moment values between [Fe(H2O)6]3+and [Fe(CN)6]3–based on Crystal Field Splitting theory.

Options:
A The presence of strong-field ligands in[Fe(H2O)6]3+results in higher spin and magnetic moment.
B [Fe(CN)6]3–has a higher oxidation state, leading to a greater magnetic moment.
C [Fe(H2O)6]3+exhibits greater Crystal Field Splitting, enhancing its magnetic moment.
D [Fe(CN)6]3–experiences weaker crystal field effects, reducing its magnetic moment.

The correct answer is:
[Fe(H2O)6]3+exhibits greater Crystal Field Splitting, enhancing its magnetic moment.

Solution:
Correct Option is : (C)
[Fe(H2O)6]3+exhibits greater Crystal Field Splitting, enhancing its magnetic moment.

Topic: Chemistry, Coordination Compounds, NEET
Explain the difference in properties of diamond and graphite on the basis of their structures.

Options:
A Diamond is a three-dimensional network of covalently bonded carbon atoms, resulting in a hard and transparent crystalline structure. Graphite, on the other hand, consists of layers of carbon atoms arranged in a hexagonal lattice, held together by weak van der Waals forces, which allows for easy sliding between layers.
B Diamond is a layered structure with strong covalent bonds within the layers, making it hard and brittle. Graphite consists of a three-dimensional network of covalently bonded carbon atoms, resulting in a soft and slippery material due to weak interlayer forces.
C Diamond is a layered structure with weak van der Waals forces between the layers, making it soft and slippery. Graphite consists of a three-dimensional network of covalently bonded carbon atoms, resulting in a hard and transparent crystalline structure.
D Diamond and graphite have similar structures, but diamond has a higher density due to stronger intermolecular forces between the layers.

The correct answer is:
Diamond is a three-dimensional network of covalently bonded carbon atoms, resulting in a hard and transparent crystalline structure. Graphite, on the other hand, consists of layers of carbon atoms arranged in a hexagonal lattice, held together by weak van der Waals forces, which allows for easy sliding between layers.

Solution:
Correct Option is : (A)
Diamond is a three-dimensional network of covalently bonded carbon atoms, resulting in a hard and transparent crystalline structure. Graphite, on the other hand, consists of layers of carbon atoms arranged in a hexagonal lattice, held together by weak van der Waals forces, which allows for easy sliding between layers.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
Explain the following: Aluminium forms [AlF₆]³⁻ ion but boron does not form [BF₆]³⁻ ion.

Options:
A Aluminium has a larger atomic radius than boron
B Aluminium has more available valence electrons compared to boron
C Aluminium has a lower effective nuclear charge than boron
D Aluminium has a higher ionization energy than boron

The correct answer is:
Aluminium has a lower effective nuclear charge than boron

Solution:
Correct Option is : (C)
Aluminium has a lower effective nuclear charge than boron

Topic: Chemistry, p Block Elements (Group 13 & 14), NEET
Explain the following: BF3does not hydrolyse.

Options:
A BF3lacks available d-orbitals for hybridization.
B Boron forms strong covalent bonds with fluorine.
C Boron has a high ionization energy.
D BF3is a Lewis acid.

The correct answer is:
Boron forms strong covalent bonds with fluorine.

Solution:
Correct Option is : (B)
Boron forms strong covalent bonds with fluorine.

Topic: Chemistry, p Block Elements (Group 13 & 14), NEET
Explain the following: Boron does not exist as B³⁺ ion.

Options:
A Boron has a higher ionization energy than beryllium
B Boron has fewer available valence electrons compared to beryllium
C Boron has a higher electron affinity than beryllium
D Boron has a higher electronegativity than beryllium

The correct answer is:
Boron has fewer available valence electrons compared to beryllium

Solution:
Correct Option is : (B)
Boron has fewer available valence electrons compared to beryllium

Topic: Chemistry, p Block Elements (Group 13 & 14), NEET
Explain the following : Carbon and hydrogen are not used as reducing agents at high temperatures.

Options:
A Carbon and hydrogen react with metals at high temperature to form carbides and hydrides respectively.
B Carbon and hydrogen form volatile compounds at high temperatures.
C Carbon and hydrogen are expensive to produce.
D Carbon and hydrogen do not release enough energy at high temperatures.

The correct answer is:
Carbon and hydrogen react with metals at high temperature to form carbides and hydrides respectively.

Solution:
Correct Option is : (A)
Carbon and hydrogen react with metals at high temperature to form carbides and hydrides respectively.

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
Explain the following: Carbon shows catenation property but lead does not.

Options:
A Carbon has a smaller atomic size than lead.
B Carbon can form strong covalent bonds with other carbon atoms.
C Lead lacks available d-orbitals for hybridization.
D Lead has a higher atomic number than carbon.

The correct answer is:
Carbon can form strong covalent bonds with other carbon atoms.

Solution:
Correct Option is : (B)
Carbon can form strong covalent bonds with other carbon atoms.

Topic: Chemistry, p Block Elements (Group 13 & 14), NEET
Explain the following: CO₂ is a gas whereas SiO₂ is a solid.

Options:
A SiO₂ molecules are heavier than CO₂ molecules
B CO₂ molecules have a linear shape while SiO₂ forms a network structure
C SiO₂ forms stronger London dispersion forces than CO₂
D CO₂ molecules have a higher boiling point than SiO₂

The correct answer is:
CO₂ molecules have a linear shape while SiO₂ forms a network structure

Solution:
Correct Option is : (B)
CO₂ molecules have a linear shape while SiO₂ forms a network structure

Topic: Chemistry, p Block Elements (Group 13 & 14), NEET
Explain the following: Electron gain enthalpy of chlorine is more negative as compared to fluorine.

Options:
A Chlorine has a higher effective nuclear charge than fluorine
B Chlorine has a lower atomic radius than fluorine
C Chlorine has a higher electron affinity than fluorine
D Chlorine has a higher ionization energy than fluorine

The correct answer is:
Chlorine has a lower atomic radius than fluorine

Solution:
Correct Option is : (B)
Chlorine has a lower atomic radius than fluorine

Topic: Chemistry, p Block Elements (Group 13 & 14), NEET
Explain the following: Gallium has higher ionization enthalpy than aluminium.

Options:
A Gallium has a smaller atomic radius than aluminium
B Gallium has a lower effective nuclear charge than aluminium
C Gallium has a higher electronegativity than aluminium
D Gallium has a higher electron affinity than aluminium

The correct answer is:
Gallium has a smaller atomic radius than aluminium

Solution:
Correct Option is : (A)
Gallium has a smaller atomic radius than aluminium

Topic: Chemistry, p Block Elements (Group 13 & 14), NEET
Explain the following : Generally sulfide ores are converted into oxides before reduction.

Options:
A Oxides are easier to transport than sulfides.
B Oxides have a lower melting point than sulfides.
C Sulphides are more stable than oxides.
D Oxides are easier to reduce than sulfides.

The correct answer is:
Oxides are easier to reduce than sulfides.

Solution:
Correct Option is : (D)
Oxides are easier to reduce than sulfides.

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
Explain the following: Pb⁴⁺ acts as an oxidizing agent but Sn²⁺ acts as a reducing agent.

Options:
A Pb⁴⁺ has a higher effective nuclear charge than Sn²⁺
B Pb⁴⁺ has a smaller atomic radius than Sn²⁺
C Pb⁴⁺ has more available valence electrons compared to Sn²⁺
D Pb⁴⁺ has a lower ionization energy than Sn²⁺

The correct answer is:
Pb⁴⁺ has a higher effective nuclear charge than Sn²⁺

Solution:
Correct Option is : (A)
Pb⁴⁺ has a higher effective nuclear charge than Sn²⁺

Topic: Chemistry, p Block Elements (Group 13 & 14), NEET
Explain the following: PbX₂ is more stable than PbX₄.

Options:
A Pb⁴⁺ has a higher effective nuclear charge than Pb²⁺
B Pb⁴⁺ has a smaller atomic radius than Pb²⁺
C Pb⁴⁺ has more available valence electrons compared to Pb²⁺
D Pb⁴⁺ has a lower ionization energy than Pb²⁺

The correct answer is:
Pb⁴⁺ has a smaller atomic radius than Pb²⁺

Solution:
Correct Option is : (B)
Pb⁴⁺ has a smaller atomic radius than Pb²⁺

Topic: Chemistry, p Block Elements (Group 13 & 14), NEET