datavorous/entrance-exam-dataset huggingface dataset:
What is the purpose of using a gas mask in coal mines?

Options:
A To enhance visibility
B To remove dust particles
C To adsorb poisonous gases
D To supply oxygen

The correct answer is:
To adsorb poisonous gases

Solution:
The paragraph mentions that gas masks, which consist of activated charcoal or a mixture of adsorbents, are used for breathing in coal mines to adsorb poisonous gases.

Topic: Chemistry, Surface Chemistry, NEET
What is the purpose of using a membrane in dialysis?

Options:
A To block the passage of colloidal particles
B To enhance stability
C To add substances to colloids
D To coagulate colloids

The correct answer is:
To block the passage of colloidal particles

Solution:
The purpose of using a membrane in dialysis is to block the passage of colloidal particles.

Topic: Chemistry, Surface Chemistry, NEET
What is the purpose of using a moderator, such as heavy water (D2O) or graphite, in a nuclear reactor?

Options:
A To increase the speed of neutrons
B To decrease the speed of neutrons
C To prevent neutron collisions
D To enhance fission reactions

The correct answer is:
To decrease the speed of neutrons

Solution:
Correct Option is : (B)
To decrease the speed of neutrons

Topic: Chemistry, Work Power Energy, NEET
What is the purpose of using a nickel catalyst in the reaction between methane and steam?

Options:
A To provide color to the reaction mixture
B To increase the temperature of the reaction
C To speed up the reaction
D To produce carbon dioxide

The correct answer is:
To speed up the reaction

Solution:
The nickel catalyst is used to accelerate the reaction without being consumed.

Topic: Chemistry, Hydrocarbons, NEET
What is the purpose of using a radioactive molecule (probe) in diagnosing diseases through PCR?

Options:
A To detect the presence of pathogen
B To detect mutated genes
C To detect antigens in ELISA
D To detect antibodies synthesized against pathogen

The correct answer is:
To detect mutated genes

Solution:
A single stranded DNA or RNA tagged with a radioactive molecule (probe) is used to hybridize to its complementary DNA in a clone of cells, which is then detected using autoradiography. The clone having the mutated gene will not appear on the photographic film, as the probe will not have complementarity with the mutated gene.

Topic: Biology, Biotechnology and Its Applications, NEET
What is the purpose of using a water pump or vacuum pump in distillation under reduced pressure?

Options:
A To increase the boiling point of the liquid
B To decrease the boiling point of the liquid
C To keep the pressure constant
D To cool the liquid

The correct answer is:
To decrease the boiling point of the liquid

Solution:
A water pump or vacuum pump is used in distillation under reduced pressure to decrease the boiling point of the liquid by reducing the pressure on its surface.

Topic: Chemistry, General Organic Chemistry, NEET
What is the purpose of using alkanes as fuels?

Options:
A To produce carbon black
B To generate electricity
C To synthesize pharmaceuticals
D To release a large amount of heat energy

The correct answer is:
To release a large amount of heat energy

Solution:
Alkanes are used as fuels because they undergo combustion, releasing a large amount of heat energy when they react with oxygen.

Topic: Chemistry, Hydrocarbons, NEET
What is the purpose of using alternative selectable markers in recombinant DNA cloning?

Options:
A To eliminate nontransformants
B To simplify the selection of recombinants
C To differentiate recombinants from non-recombinants
D To produce blue color in colonies

The correct answer is:
To simplify the selection of recombinants

Solution:
Alternative selectable markers have been developed to simplify the selection of recombinants.

Topic: Biology, Biotechnology - Principles and Processes, NEET
What is the purpose of using an alkaline medium in Tollens' test?

Options:
A To neutralise the aldehyde
B To enhance the colour of the silver mirror
C To prevent the formation of silver metal
D To provide a suitable environment for the reaction

The correct answer is:
To provide a suitable environment for the reaction

Solution:
An alkaline medium is used in Tollens' test to provide a suitable environment for the reaction between the aldehyde and Tollens' reagent.

Topic: Chemistry, Aldehydes, Ketones and Carboxylic Acids, NEET
What is the purpose of using an indicator substance in a titration involving K2Cr2O7?

Options:
A To reduce K2Cr2O7
B To oxidize K2Cr2O7
C To signal the end point of the titration
D To neutralize K2Cr2O7

The correct answer is:
To signal the end point of the titration

Solution:
The indicator substance is used to signal the end point of the titration by undergoing a dramatic color change.

Topic: Chemistry, Redox Reactions, NEET
What is the purpose of using animal charcoal in the removal of colouring matter from solutions?

Options:
A To enhance color
B To improve solubility
C To adsorb coloured impurities
D To increase viscosity

The correct answer is:
To adsorb coloured impurities

Solution:
The paragraph mentions that animal charcoal removes colours of solutions by adsorbing coloured impurities.

Topic: Chemistry, Surface Chemistry, NEET
What is the purpose of using bacteriophage or plasmid as a vector in genetic engineering?

Options:
A To control the replication of their genome
B To increase the copy number of their genome
C To decrease the copy number of their genome
D To make it difficult to link foreign DNA

The correct answer is:
To increase the copy number of their genome

Solution:
By linking an alien piece of DNA with bacteriophage or plasmid DNA, the copy number of the alien DNA can be increased equal to the copy number of the bacteriophage or

Topic: Biology, Biotechnology - Principles and Processes, NEET
What is the purpose of using dihydrogen in the production of metal hydrides?

Options:
A It serves as a fuel source
B It helps reduce metal oxides to metals
C It acts as a reducing agent
D It enhances the color of metals

The correct answer is:
It helps reduce metal oxides to metals

Solution:
Dihydrogen is used in the production of metal hydrides, primarily to help reduce metal oxides to their corresponding metals.

Topic: Chemistry, Hydrogen, NEET
What is the purpose of using dry ether in the Wurtz reaction?

Options:
A Dry ether acts as a reactant.
B Dry ether enhances the reactivity of sodium.
C Dry ether helps to keep the reaction mixture free from moisture.
D Dry ether is a source of oxygen in the reaction.

The correct answer is:
Dry ether helps to keep the reaction mixture free from moisture.

Solution:
Dry ether is used in the Wurtz reaction to ensure that the reaction mixture is free from moisture, as moisture can interfere with the reaction.

Topic: Chemistry, Hydrocarbons, NEET
What is the purpose of using heavy water in exchange reactions for the study of reaction mechanisms?

Options:
A To increase the reaction rate
B To enhance the yield of products
C To replace normal water in reactions
D To label specific atoms in molecules

The correct answer is:
To label specific atoms in molecules

Solution:
Heavy water is used in exchange reactions for the study of reaction mechanisms to label specific atoms in molecules, allowing researchers to track their movement.

Topic: Chemistry, Hydrogen, NEET
What is the purpose of using K2Cr2O7 in a titration?

Options:
A To act as a reducing agent
B To act as an oxidizing agent
C To act as a pH indicator
D To act as a catalyst

The correct answer is:
To act as an oxidizing agent

Solution:
K2Cr2O7 is used as an oxidizing agent in titrations to oxidize the substance being titrated.

Topic: Chemistry, Redox Reactions, NEET
What is the purpose of using Ladybirds in agriculture?

Options:
A To kill mosquitoes
B To control butterfly caterpillars
C To get rid of aphids
D To control dragonflies

The correct answer is:
To get rid of aphids

Solution:
Ladybirds are used to get rid of aphids, which are harmful insects that feed on plants.

Topic: Biology, Microbes in Human Welfare, NEET
What is the purpose of using metals like iron, zinc, and tin for the reduction of nitro compounds in an acidic medium?

Options:
A To release hydrogen gas.
B To release hydrochloric acid.
C To increase the reaction temperature.
D To form a stable complex.

The correct answer is:
To release hydrogen gas.

Solution:
These metals react with acids to release hydrogen gas, which reduces the nitro compounds.

Topic: Chemistry, Amines, NEET
What is the purpose of using multiple canonical structures in resonance theory?

Options:
A To create confusion about the molecule's structure
B To account for different energy levels in the molecule
C To represent different bond angles in the molecule
D To accurately describe the electronic distribution in the molecule

The correct answer is:
To accurately describe the electronic distribution in the molecule

Solution:
Multiple canonical structures are used in resonance theory to accurately describe the electronic distribution in the molecule.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
What is the purpose of using nitric acid in the oxidation of glucose and gluconic acid?

Options:
A To reduce them to simpler compounds
B To hydrolyze them into sugars
C To convert them into aldehydes
D To oxidize them into saccharic acid

The correct answer is:
To oxidize them into saccharic acid

Solution:
Nitric acid is used to oxidize glucose and gluconic acid into saccharic acid, as described in the passage.

Topic: Chemistry, Biomolecules, NEET
What is the purpose of using oxidizing agents like HIO3 or HNO3 in iodination reactions?

Options:
A To increase reaction speed
B To generate iodine radicals
C To make the reaction irreversible
D To stabilize the reaction mixture

The correct answer is:
To make the reaction irreversible

Solution:
Oxidizing agents like HIO3 or HNO3 are used in iodination reactions to make the reaction irreversible. This helps in ensuring the completion of the reaction.

Topic: Chemistry, Hydrocarbons, NEET
What is the purpose of using parentheses in coordination compound formulas?

Options:
A To indicate charge
B To enclose ligands
C To enclose counter ions
D To separate ligands

The correct answer is:
To enclose ligands

Solution:
Parentheses in coordination compound formulas are used to enclose ligands, especially when they are polyatomic.

Topic: Chemistry, Coordination Compounds, NEET
What is the purpose of using prefixes like bis, tris, and tetrakis in coordination compound nomenclature?

Options:
A To indicate the number of ligands
B To indicate the charge of the complex
C To indicate the size of the ligands
D To indicate the atomic number of the metal

The correct answer is:
To indicate the number of ligands

Solution:
Prefixes like bis, tris, and tetrakis are used in coordination compound nomenclature to indicate the number of ligands when numerical prefixes are present in their names.

Topic: Chemistry, Coordination Compounds, NEET
What is the purpose of using prefixes such as di, tri, tetra, etc., in naming multi-substituted compounds?

Options:
A To indicate the molecular weight of the substituents
B To simplify the naming process
C To denote the color of the compound
D To indicate the number of identical substituent groups

The correct answer is:
To indicate the number of identical substituent groups

Solution:
The paragraph states that prefixes such as di, tri, tetra, etc., are used to indicate the number of identical substituent groups in multi-substituted compounds.

Topic: Chemistry, General Organic Chemistry, NEET
What is the purpose of using primers in PCR?

Options:
A To amplify the segment of DNA
B To purify the desired protein
C To provide optimal growth conditions
D To extend the primers using genomic DNA as template

The correct answer is:
To extend the primers using genomic DNA as template

Solution:
The purpose of using primers in PCR is to extend the primers using the nucleotides provided in the reaction and the genomic DNA as template.

Topic: Biology, Biotechnology - Principles and Processes, NEET
What is the purpose of using spermicidal creams, jellies, and foams in barrier methods of contraception?

Options:
A To increase contraceptive efficiency
B To protect the user from contracting STIs and AIDS
C To cover the male penis
D To block the entry of sperms

The correct answer is:
To increase contraceptive efficiency

Solution:
Spermicidal creams, jellies, and foams are usually used along with the cervical caps, diaphragms, and vaults to increase their contraceptive efficiency.

Topic: Biology, Reproductive Health, NEET
What is the purpose of using spermicidal creams, jellies and foams with barrier methods of contraception?

Options:
A To provide privacy to the user
B To reduce the risk of contracting STIs and AIDS
C To increase the contraceptive efficiency
D To prevent the meeting of ovum and sperms

The correct answer is:
To increase the contraceptive efficiency

Solution:
Spermicidal creams, jellies and foams are usually used along with barriers such as condoms, diaphragms, cervical caps and vaults to increase their contraceptive efficiency.

Topic: Biology, Reproductive Health, NEET
What is the purpose of using square brackets in coordination compound formulas?

Options:
A To indicate charge
B To enclose ligands
C To enclose counter ions
D To separate ligands

The correct answer is:
To enclose ligands

Solution:
Square brackets in coordination compound formulas are used to enclose the ligands.

Topic: Chemistry, Coordination Compounds, NEET
What is the purpose of using synthetic membranes in DNA fingerprinting?

Options:
A To isolate DNA
B To digest DNA by restriction endonucleases
C To separate DNA fragments by electrophoresis
D To transfer separated DNA fragments for hybridisation

The correct answer is:
To transfer separated DNA fragments for hybridisation

Solution:
Synthetic membranes such as nitrocellulose or nylon are used to transfer separated DNA fragments for hybridisation with a labelled VNTR probe.

Topic: Biology, Molecular Basis of Inheritance, NEET
What is the purpose of using the froth flotation method?

Options:
A To increase the density of the ore
B To decrease the density of the ore
C To remove gangue from sulphide ores
D To dissolve sulphide ores in water

The correct answer is:
To remove gangue from sulphide ores

Solution:
The froth flotation method is employed specifically for removing gangue from sulphide ores.

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
What is the purpose of using the same solvent repeatedly in continuous extraction?

Options:
A To increase the boiling point of the solvent
B To decrease the boiling point of the solvent
C To minimize the use of solvent
D To avoid separation of layers

The correct answer is:
To minimize the use of solvent

Solution:
Using the same solvent repeatedly in continuous extraction minimizes the quantity of solvent required for extraction.

Topic: Chemistry, General Organic Chemistry, NEET
What is the purpose of using Trichoderma as a biological control?

Options:
A To control plant pathogens
B To attack insects and other arthropods
C To aid in integrated pest management
D To have negative impacts on the environment

The correct answer is:
To control plant pathogens

Solution:
Trichoderma is a fungus that is being developed as a biological control for use in the treatment of plant disease and to control plant pathogens.

Topic: Biology, Microbes in Human Welfare, NEET
What is the purpose of using viruses as vectors in Gene therapy?

Options:
A To transfer healthy genes or portions of genes
B To increase crop yields
C To treat hereditary diseases
D To reduce post-harvest losses

The correct answer is:
To transfer healthy genes or portions of genes

Solution:
Viruses are used as vectors in Gene therapy to transfer healthy genes or portions of genes into the host cell.

Topic: Biology, Biotechnology and Its Applications, NEET
What is the purpose of using zeolite (permutit) in the ion-exchange method for water softening?

Options:
A To increase water hardness
B To remove all dissolved ions from the water
C To precipitate hardness ions as insoluble compounds
D To exchange sodium ions for hardness ions

The correct answer is:
To exchange sodium ions for hardness ions

Solution:
Zeolite (permutit) is used in the ion-exchange method for water softening to exchange sodium ions in zeolite for hardness ions (calcium and magnesium ions) present in hard water.

Topic: Chemistry, Hydrogen, NEET
What is the purpose of vaccines?

Options:
A To neutralize the pathogenic agents during actual infection
B To produce antigenic polypeptides of pathogens
C To generate memory in the immune system
D To provide large scale production of vaccines

The correct answer is:
To neutralize the pathogenic agents during actual infection

Solution:
Vaccines are introduced into the body to produce antibodies against antigenic proteins of pathogen or inactivated/weakened pathogen, which would neutralize the pathogenic agents during actual infection.

Topic: Biology, Human Health and Diseases, NEET
What is the purpose of variations in different parts of plants?

Options:
A To attract pollinators
B For protection
C For climbing
D As adaptations to their environment

The correct answer is:
As adaptations to their environment

Solution:
Variations in different parts of plants serve as adaptations to their environment, such as for protection, climbing, storage, or to suit various habitats. These adaptations help the plant to better survive in its environment.

Topic: Biology, Morphology of Flowering Plants, NEET
What is the purpose of vectors in recombinant DNA procedures?

Options:
A to provide the origin of replication
B to catalyze polymerization
C to join discontinuously synthesized fragments
D none of the above

The correct answer is:
to provide the origin of replication

Solution:
A piece of DNA required to be propagated during recombinant DNA procedures requires a vector, which provides the origin of replication.

Topic: Biology, Molecular Basis of Inheritance, NEET
What is the purpose of wheat variety, Atlas 66, having a high protein content?

Options:
A To reduce the risk of disease
B To improve the nutritional quality of wheat
C To increase lifespan
D None of the above

The correct answer is:
To improve the nutritional quality of wheat

Solution:
The purpose of wheat variety, Atlas 66, having a high protein content is to improve the nutritional quality of wheat.

Topic: Biology, Strategies for Enhancement in Food Production, NEET
What is the purpose of yoga in health?

Options:
A To increase longevity
B To reduce infant and maternal mortality
C To achieve physical and mental health
D To increase productivity

The correct answer is:
To achieve physical and mental health

Solution:
Yoga has been practised since ancient times to achieve physical and mental health, not just to increase longevity or reduce infant and maternal mortality.

Topic: Biology, Human Health and Diseases, NEET
What is the qualitative measure of the stability of an ionic compound?

Options:
A Achieving an octet of electrons around the ionic species in the gaseous state
B Ionization enthalpy
C Electron gain enthalpy
D Enthalpy of lattice formation

The correct answer is:
Enthalpy of lattice formation

Solution:
The qualitative measure of the stability of an ionic compound is provided by its enthalpy of lattice formation.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
What is the quantitative relationship between pressure and solubility of a gas in a solvent known as?

Options:
A Charles's Law
B Boyle's Law
C Henry's Law
D Dalton's Law

The correct answer is:
Henry's Law

Solution:
The paragraph mentions that the quantitative relationship between pressure and solubility of a gas in a solvent is known as Henry's Law.

Topic: Chemistry, Solutions, NEET
What is the quantity of electricity (Q) in commercial production when a current of 50,000 amperes is used for 1 second?

Options:
A 0.518 F
B 50,000 F
C 1.6021 × 1019 F
D 96500 C mol-1

The correct answer is:
0.518 F

Solution:
When a current of 50,000 amperes is used for 1 second, the quantity of electricity is approximately 0.518 F.

Topic: Chemistry, Electrochemistry, NEET
What is the quantum yield of photosynthesis?

Options:
A 9%
B 12%
C 8%
D 38%

The correct answer is:
8%

Solution:
By definition the quantum yield of photosynthesis is the molar ratio between oxygen released in photosynthesis (or carbon assimilated) to photons absorbed in the process. It is denoted by ϕ .The quantum ratio generally stays <1 as all photons are not absorbed productively.
Typically for every mole of quanta absorbed 0.06 moles of CO2 is fixed under normal conditions.
Quantum yield is found to be around 8% in the photosynthesis process.

Topic: Biology, Photosynthesis in Higher Plants, NEET
What is the R group in a fatty acid?

Options:
A A nitrogen atom
B A carbon atom
C A phosphorus atom
D A sulphur atom

The correct answer is:
A carbon atom

Solution:
The R group in a fatty acid is a carbon atom and could be a methyl or ethyl.

Topic: Biology, Biomolecules (B), NEET
What is the R group in proteinaceous amino acids?

Options:
A A hydrogen
B A methyl group
C Hydroxy methyl
D All of the above

The correct answer is:
All of the above

Solution:
The R group in proteinaceous amino acids could be a hydrogen (the amino acid is called glycine), a methyl group (alanine), hydroxy methyl (serine).

Topic: Biology, Biomolecules (B), NEET
What is the radiation pressure exerted by an electromagnetic wave of intensity I on a surface kept in a vacuum?

Options:
A I
B I/2
C I/c
D Ic

The correct answer is:
I/c

Solution:
Correct Option is : (C)
I/c

Topic: Chemistry, Electromagnetic Waves, NEET
What is the radioactive isotope of carbon with a half-life of 5770 years used for radiocarbon dating?

Options:
A 12C
B 13C
C 14C
D 15C

The correct answer is:
14C

Solution:
14C is present. It is a radioactive isotope with a half-life of 5770 years and used for radiocarbon dating.

Topic: Chemistry, p Block Elements (Group 13 & 14), NEET
What is the radius of the circular orbit of an electron shot into a chamber with a uniform magnetic field of 6.5 G (1 G = 10–4T) at a speed of 4.8 × 106m/s, normal to the field, given the electron charge (e = 1.5 × 10–19C) and mass (me = 9.1×10–31kg)?

Options:
A 2.1 cm
B 3.5 cm
C 5.6 cm
D 4.2 cm

The correct answer is:
4.2 cm

Solution:
Correct Option is : (D)
4.2 cm

Topic: Chemistry, Magnetic Effects of Current, NEET
What is the radius of the path of an electron (mass 9 × 10-31kg and charge 1.6 × 10-19C) moving at a speed of 3 × 107m/s in a magnetic field of 6 × 10-4T perpendicular to it?

Options:
A 2.8 cm
B 0.28 cm
C 0.028 cm
D 280 cm

The correct answer is:
2.8 cm

Solution:
Correct Option is : (A)
2.8 cm

Topic: Chemistry, Magnetic Effects of Current, NEET
What is the radius of the smallest spherical water droplet that can form without evaporating at 20°C, given that the surface tension and vapor pressure of water at that temperature are 7.28×10–2Nm–1and 2.33×103Pa, respectively?

Options:
A 6.25 × 10-6m
B 6.25 × 10-5m
C 6.25 × 10-4m
D 6.25 × 10-3m

The correct answer is:
6.25 × 10-5m

Solution:
Correct Option is : (B)
6.25 × 10-5m

Topic: Chemistry, Mechanical Properties of Fluids, NEET
What is the range of atomic numbers affected by the lanthanoid contraction?

Options:
A Lanthanum to lutetium
B Scandium to zinc
C Sodium to potassium
D Barium to radium

The correct answer is:
Lanthanum to lutetium

Solution:
The overall decrease in atomic and ionic radii from lanthanum to lutetium (the lanthanoid contraction) is a unique feature in the chemistry of the lanthanoids.

Topic: Chemistry, d and f Block Elements, NEET
What is the range of composition for FeO in crystals?

Options:
A Fe₀.₉₃O to Fe₀.₉₆O
B FeO to Fe₄O₃
C Fe₃O₄ to Fe₂O₃
D Fe₀.₉₅O to Fe₀.₉₈O

The correct answer is:
Fe₀.₉₃O to Fe₀.₉₆O

Solution:
In crystals of FeO, the composition may range from Fe₀.₉₃O to Fe₀.₉₆O.

Topic: Chemistry, Solid State, NEET