datavorous/entrance-exam-dataset huggingface dataset:
What quantity is measured in "Mass by volume percentage (w/V)"?

Options:
A Mass of the solvent in 100 mL of the solution
B Mass of the solute in 100 mL of the solution
C Volume of the solute in 100 mL of the solution
D Volume of the solvent in 100 mL of the solution

The correct answer is:
Mass of the solute in 100 mL of the solution

Solution:
The paragraph specifies that "Mass by volume percentage (w/V)" measures the mass of the solute in 100 mL of the solution.

Topic: Chemistry, Solutions, NEET
What quantity is required to determine the average translational kinetic energy of a gas particle in a straight line?

Options:
A The mass of the gas particle
B The number of gas molecules
C The value of mean of square of speeds
D The temperature of the gas

The correct answer is:
The value of mean of square of speeds

Solution:
To calculate the average translational kinetic energy for the movement of a gas particle in a straight line, you need the value of the mean of the square of speeds (u²) of all molecules.

Topic: Chemistry, States of Matter, NEET
What question did Louis Pasteur's experiment not answer?

Options:
A How the first life form came on earth
B How life came from pre:existing life
C How life came from killed yeast
D How life came from decaying and rotting matter

The correct answer is:
How the first life form came on earth

Solution:
Louis Pasteur's experiment did not answer how the first life form came on earth.

Topic: Biology, Evolution, NEET
What reaction causes the formation of scum/precipitate when soap reacts with hard water?

Options:
A Hydrolysis reaction
B Oxidation reaction
C Reduction reaction
D Precipitation reaction

The correct answer is:
Precipitation reaction

Solution:
When soap reacts with hard water, it forms scum/precipitate through a precipitation reaction, resulting in the formation of insoluble calcium or magnesium stearate.

Topic: Chemistry, Hydrogen, NEET
What reaction leads to the formation of metal compounds in the leaching process?

Options:
A Oxidation reaction
B Reduction reaction
C Replacement reaction
D Combustion reaction

The correct answer is:
Replacement reaction

Solution:
The metal compounds are obtained later by a replacement reaction.

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
What reaction occurs at the cathode during corrosion of iron?

Options:
A 2 Fe (s) → 2 Fe2+ + 4 e-
B O2(g) + 4 H+(aq) + 4 e-→ 2 H2O (l)
C 2Fe(s) + O2(g) + 4H+(aq) →2Fe2+(aq) + 2 H2O (l)
D E(cell) =1.67 V

The correct answer is:
O2(g) + 4 H+(aq) + 4 e-→ 2 H2O (l)

Solution:
The cathode reaction during corrosion of iron is "Cathode: O2(g) + 4 H+(aq) + 4 e-→ 2 H2O (l)."

Topic: Chemistry, Electrochemistry, NEET
What reaction occurs at the cathode during the electrolysis of the molten mass in the aluminium extraction process?

Options:
A Al3+ (melt) + 3e- → Al(l)
B C(s) + O2- (melt) → CO(g) + 2e-
C Al(l) + 2O2- (melt) → Al2O3(s) + 4e-
D CO(g) + 2e- → C(s) + O2- (melt)

The correct answer is:
Al3+ (melt) + 3e- → Al(l)

Solution:
This reaction occurs at the cathode during the electrolysis process for aluminium extraction.

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
What reaction occurs when iron oxide reacts with silica in the furnace?

Options:
A FeO + SiO2 → FeSiO3 (slag)
B FeO + SiO2 → Fe2O3
C FeS + SiO2 → FeSiO3
D Fe2O3 + SiO2 → FeSiO3 + O2

The correct answer is:
FeO + SiO2 → FeSiO3 (slag)

Solution:
The reaction produces iron silicate (slag) when iron oxide reacts with silica.

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
What reactions occur at the anode and cathode during the electrolysis of brine solution?

Options:
A At anode: 2H2O(l) → 2H2(g) + O2(g); At cathode: 2Cl–(aq) → Cl2(g) + 2e–
B At anode: 2Cl–(aq) → Cl2(g) + 2e–; At cathode: 2H2O(l) → 2H2(g) + 2OH–(aq)
C At anode: 2H2O(l) → 2H2(g) + 2OH–(aq); At cathode: 2Cl–(aq) → Cl2(g) + 2e–
D At anode: 2Na+(aq) + 2OH–(aq) → 2NaOH(l); At cathode: 2H2O(l) → 2H2(g) + O2(g)

The correct answer is:
At anode: 2Cl–(aq) → Cl2(g) + 2e–; At cathode: 2H2O(l) → 2H2(g) + 2OH–(aq)

Solution:
At the anode, 2Cl– ions lose electrons and form chlorine gas (Cl2), while at the cathode, 2H2O molecules gain electrons and form hydrogen gas (H2) and hydroxide ions (OH–).

Topic: Chemistry, Hydrogen, NEET
What reacts with carbon dioxide (dry ice) to form salts of carboxylic acids?

Options:
A Alkyl halides
B Grignard reagents
C Aldehydes
D Ketones

The correct answer is:
Grignard reagents

Solution:
Grignard reagents react with carbon dioxide (dry ice) to form salts of carboxylic acids.

Topic: Chemistry, Aldehydes, Ketones and Carboxylic Acids, NEET
What reagent is used for the acetylation of glucose?

Options:
A Glucose
B Acetic acid
C Acetic anhydride
D Glucose pentaacetate

The correct answer is:
Acetic anhydride

Solution:
Acetylation of glucose is done with acetic anhydride.

Topic: Chemistry, Biomolecules, NEET
What reagent is used for the oxidation step in hydroboration-oxidation?

Options:
A Diborane
B Hydrogen peroxide
C Sodium hydroxide
D Alkene

The correct answer is:
Hydrogen peroxide

Solution:
Hydrogen peroxide is used for the oxidation step in hydroboration-oxidation.

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
What reagent is used in Tollens' test to detect aldehydes?

Options:
A Silver nitrate
B Ammonium chloride
C Ammoniacal silver nitrate
D Sodium hydroxide

The correct answer is:
Ammoniacal silver nitrate

Solution:
Tollens' test involves the use of ammoniacal silver nitrate solution, also known as Tollens' reagent, to detect aldehydes.

Topic: Chemistry, Aldehydes, Ketones and Carboxylic Acids, NEET
What reagent is used to prepare alkyl iodides from alcohols in the presence of 95% orthophosphoric acid?

Options:
A Thionyl chloride
B Sodium iodide
C Phosphorus tribromide
D Concentrated HBr

The correct answer is:
Sodium iodide

Solution:
Sodium iodide is used in the presence of 95% orthophosphoric acid to prepare alkyl iodides.

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
What reagents are required for the Friedel-Crafts acylation reaction to take place?

Options:
A Oxygen and sulfuric acid
B Carbon monoxide and hydrogen chloride
C Acid chloride and anhydrous aluminium chloride
D Sodium hydroxide and ethanol

The correct answer is:
Acid chloride and anhydrous aluminium chloride

Solution:
The Friedel-Crafts acylation reaction involves the use of acid chloride and anhydrous aluminium chloride as reagents.

Topic: Chemistry, Aldehydes, Ketones and Carboxylic Acids, NEET
What reagents are used in the Hoffmann bromamide degradation reaction to convert amides into primary amines?

Options:
A Hydrochloric acid (HCl)
B Sodium hydroxide (NaOH) and bromine (Br2)
C Hydrogen peroxide (H2O2)
D Sodium chloride (NaCl)

The correct answer is:
Sodium hydroxide (NaOH) and bromine (Br2)

Solution:
In the Hoffmann bromamide degradation reaction, amides are treated with sodium hydroxide (NaOH) and bromine (Br2) to convert them into primary amines.

Topic: Chemistry, Amines, NEET
What recognition did John Alexander Newlands receive for his work on the Law of Octaves?

Options:
A He received a Nobel Prize.
B He received the Davy Medal from the Royal Society, London.
C His work was widely accepted during his time.
D None of the above.

The correct answer is:
He received the Davy Medal from the Royal Society, London.

Solution:
John Alexander Newlands received the Davy Medal from the Royal Society, London, for his work on the Law of Octaves.

Topic: Chemistry, Classification of Elements and Periodicity in Properties, NEET
What reduces osmotic pressure at the sink?

Options:
A Diffusion
B Osmosis
C Active transport
D Osmotic pressure

The correct answer is:
Active transport

Solution:
Active transport is necessary to move the sucrose out of the phloem sap and into the cells, reducing the osmotic pressure at the sink.

Topic: Biology, Transport in Plants, NEET
What regulates the normal activities of the heart?

Options:
A Autonomic nervous system
B Adrenal medullary hormones
C Nodal tissue
D Sympathetic nerves

The correct answer is:
Nodal tissue

Solution:
Normal activities of the heart are regulated intrinsically, i.e., auto regulated by specialised muscles (nodal tissue), hence the heart is called myogenic.

Topic: Biology, Body Fluids and Circulation, NEET
What regulates the opening and closing of stomata?

Options:
A Transpiration
B Gaseous exchange
C Guard cells
D Subsidiary cells

The correct answer is:
Guard cells

Solution:
The guard cells are responsible for regulating the opening and closing of stomata. They possess chloroplasts and control the process of transpiration and gaseous exchange.

Topic: Biology, Anatomy of Flowering Plants, NEET
What regulates the opening of the oesophagus into the stomach?

Options:
A The stomach muscles
B The small intestine muscles
C A muscular sphincter (gastro-oesophageal)]
D The diaphragm

The correct answer is:
A muscular sphincter (gastro-oesophageal)]

Solution:
A muscular sphincter (gastro-oesophageal) regulates the opening of oesophagus into the stomach. This sphincter acts as a valve that controls the flow of food from the oesophagus into the stomach.

Topic: Biology, Digestion and Absorption, NEET
What regulates the rate of function of a pond ecosystem?

Options:
A Solar input
B Climatic conditions
C Decomposers
D Autotrophic components

The correct answer is:
Climatic conditions

Solution:
The solar input, cycle of temperature, day:length and other climatic conditions regulate the rate of function of a pond ecosystem.

Topic: Biology, Ecosystem, NEET
What regulates the secretion of parathyroid hormone (PTH)?

Options:
A Blood glucose levels
B Blood insulin levels
C Blood calcium levels
D Blood magnesium levels

The correct answer is:
Blood calcium levels

Solution:
The secretion of PTH is regulated by the circulating levels of calcium ions.

Topic: Biology, Chemical Coordination and Integration, NEET
What relationship exists between the Sun-planet distance (${{r}_{P}}$) and the speed of the planet at the perihelion (${{v}_{P}}$) as compared to the corresponding quantities at the aphelion (${{r}_{A}}$ and${{v}_{A}}$) in Fig.?

Options:
A $\frac{{{v}_{P}}}{{{v}_{A}}}=\frac{{{r}_{P}}}{{{r}_{A}}}$
B $\frac{{{v}_{P}}}{{{v}_{A}}}=\frac{2{{r}_{P}}}{{{r}_{A}}}$
C $\frac{{{v}_{P}}}{{{v}_{A}}}=\frac{2{{r}_{A}}}{{{r}_{P}}}$
D $\frac{{{v}_{P}}}{{{v}_{A}}}=\frac{{{r}_{A}}}{{{r}_{P}}}$

The correct answer is:
$\frac{{{v}_{P}}}{{{v}_{A}}}=\frac{{{r}_{A}}}{{{r}_{P}}}$

Solution:
Correct Option is : (D)
$\frac{{{v}_{P}}}{{{v}_{A}}}=\frac{{{r}_{A}}}{{{r}_{P}}}$

Topic: Chemistry, Gravitation, NEET
What repeats the events described in the cardiac cycle?

Options:
A The contraction of the ventricles and atria
B The relaxation of the ventricles and atria
C The SAN
D The veins

The correct answer is:
The SAN

Solution:
The SAN generates a new action potential and the events described in the cardiac cycle are repeated in that sequence.

Topic: Biology, Body Fluids and Circulation, NEET
What replaced the Bohr model and provided a solution to its weaknesses?

Options:
A The extended Bohr model
B Quantum mechanics
C The wave-particle model
D The Heisenberg model

The correct answer is:
Quantum mechanics

Solution:
The quantum mechanics replaced the Bohr model and provided a solution to its weaknesses.

Topic: Chemistry, Structure of Atom, NEET
What represents the genus in the scientific names of organisms?

Options:
A The first word of the scientific name
B The second word of the scientific name
C The third word of the scientific name
D The last word of the scientific name

The correct answer is:
The first word of the scientific name

Solution:
The first words of scientific names such as Mangifera, Solanum and Panthera represent the genus in the scientific names of organisms and they represent another higher level of taxonomy or category.

Topic: Biology, The Living World, NEET
What represents the specific epithets in the scientific names of organisms?

Options:
A The first word of the scientific name
B The second word of the scientific name
C The third word of the scientific name
D The last word of the scientific name

The correct answer is:
The second word of the scientific name

Solution:
The specific epithets, such as indica, tuberosum and leo, represent the specific epithets in the scientific names of organisms. They are the second word of the scientific name.

Topic: Biology, The Living World, NEET
What results from the action of the rotating paddle in the Froth Floatation method?

Options:
A Formation of solid particles
B Formation of a dense solution
C Formation of a froth
D Formation of a precipitate

The correct answer is:
Formation of a froth

Solution:
The agitation caused by the rotating paddle results in the formation of froth in the Froth Floatation method.

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
What results from the random motion of gas particles?

Options:
A A fixed shape for the gas
B An increase in temperature
C Collisions between particles and container walls
D Formation of chemical bonds

The correct answer is:
Collisions between particles and container walls

Solution:
The random motion of gas particles results in collisions between the particles and the walls of the container.

Topic: Chemistry, States of Matter, NEET
What returns the diaphragm and sternum to their normal positions?

Options:
A Contraction of diaphragm
B Relaxation of diaphragm
C Contraction of external intercostal muscles
D Relaxation of intercostal muscles

The correct answer is:
Relaxation of diaphragm

Solution:
The relaxation of the diaphragm and the intercostal muscles returns the diaphragm and sternum to their normal positions.

Topic: Biology, Breathing and Exchange of Gases, NEET
What reward do animal-pollinated flowers offer to attract animal visitors?

Options:
A Food
B Water
C Shelter
D Nectar and pollen grains

The correct answer is:
Nectar and pollen grains

Solution:
To sustain animal visits, the flowers have to provide rewards to the animals. Nectar and pollen grains are the usual floral rewards.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET
What role are high-temperature superconductors expected to play in the future?

Options:
A They are not expected to play any role.
B They will make materials lighter.
C They will become magnetic materials.
D They are expected to play an important role.

The correct answer is:
They are expected to play an important role.

Solution:
High-temperature superconductors are mentioned as materials expected to play an important role in the future in the paragraph.

Topic: Chemistry, Solid State, NEET
What role did DDT play during World War II?

Options:
A Controlling crop diseases
B Controlling malaria and insect-borne diseases
C Enhancing crop growth
D Improving soil fertility

The correct answer is:
Controlling malaria and insect-borne diseases

Solution:
DDT was found to be of great use in the control of malaria and other insect-borne diseases during World War II.

Topic: Chemistry, Environmental Chemistry, NEET
What role do bases play according to the Brönsted-Lowry theory?

Options:
A Bases are hydroxide ion donors.
B Bases are proton donors.
C Bases are proton acceptors.
D Bases are hydroxide ion acceptors.

The correct answer is:
Bases are proton acceptors.

Solution:
According to the Brönsted-Lowry theory, bases are proton acceptors.

Topic: Chemistry, Ionic Equilibrium, NEET
What role do chlorine radicals play in ozone depletion?

Options:
A Chlorine radicals promote the formation of ozone.
B Chlorine radicals have no impact on ozone in the stratosphere.
C Chlorine radicals break down ozone molecules.
D Chlorine radicals enhance ozone stability.

The correct answer is:
Chlorine radicals break down ozone molecules.

Solution:
Chlorine radicals released from CFCs in the stratosphere react with ozone, causing the breakdown of ozone molecules and contributing to ozone layer depletion.

Topic: Chemistry, Environmental Chemistry, NEET
What role do CN– ions play in the leaching process?

Options:
A They act as reducing agents
B They provide oxygen
C They form metal complexes
D They precipitate the metals

The correct answer is:
They form metal complexes

Solution:
CN– ions form complexes with the metals during the leaching process.

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
What role do d–orbitals play in the formation of transition metals?

Options:
A They release electrons to the p–orbitals.
B They release electrons to the f–orbitals.
C They receive electrons, giving rise to transition metals.
D They are not involved in the formation of transition metals.

The correct answer is:
They receive electrons, giving rise to transition metals.

Solution:
d–orbitals receive electrons, and this process gives rise to transition metals.

Topic: Chemistry, d and f Block Elements, NEET
What role do plant growth regulators play in Plant Growth and Development?

Options:
A The only role in Plant Growth and Development
B One of the intrinsic controls in Plant Growth and Development
C The extrinsic controls in Plant Growth and Development
D No role in Plant Growth and Development

The correct answer is:
One of the intrinsic controls in Plant Growth and Development

Solution:
The role of PGR is of only one kind of intrinsic control. Along with genomic control and extrinsic factors, they play an important role in Plant Growth and Development.

Topic: Biology, Plant - Growth and Development, NEET
What role do synthetic chemicals play in the synthesis of semi-synthetic polymers?

Options:
A Synthetic chemicals serve as the source material for semi-synthetic polymers.
B Synthetic chemicals have no role in the synthesis of semi-synthetic polymers.
C Synthetic chemicals are used to color semi-synthetic polymers.
D Synthetic chemicals are added to enhance the durability of semi-synthetic polymers.

The correct answer is:
Synthetic chemicals serve as the source material for semi-synthetic polymers.

Solution:
Synthetic chemicals serve as the source material for semi-synthetic polymers.

Topic: Chemistry, Polymers, NEET
What role do synthetic polymers like plastic, synthetic fibres, and synthetic rubbers play in daily life and industry?

Options:
A They are primarily used as food additives.
B They serve as insulating materials for electrical wires.
C They are extensively used in daily life as well as in industry.
D They are used exclusively in the medical field.

The correct answer is:
They are extensively used in daily life as well as in industry.

Solution:
Synthetic polymers like plastic, synthetic fibres, and synthetic rubbers are extensively used in daily life as well as in industry.

Topic: Chemistry, Polymers, NEET
What role does adsorption play in heterogeneous catalysis?

Options:
A Adsorption has no role in heterogeneous catalysis.
B Adsorption helps in the dispersion of catalysts in the reaction mixture.
C Adsorption increases the rate of heterogeneous catalytic reactions by providing a surface for reactants to adsorb and react.
D Adsorption inhibits catalytic reactions by blocking active sites.

The correct answer is:
Adsorption increases the rate of heterogeneous catalytic reactions by providing a surface for reactants to adsorb and react.

Solution:
Correct Option is : (C)
Adsorption increases the rate of heterogeneous catalytic reactions by providing a surface for reactants to adsorb and react.

Topic: Chemistry, Surface Chemistry, NEET
What role does aluminum chloride (Lewis acid) play in the reaction of aromatic carboxylic acids with Friedel-Crafts reagents?

Options:
A Activating the carboxyl group
B Deactivating the carboxyl group
C Bonding to the carboxyl group
D Acting as a solvent

The correct answer is:
Bonding to the carboxyl group

Solution:
Aluminum chloride (Lewis acid) bonds to the carboxyl group in the reaction of aromatic carboxylic acids with Friedel-Crafts reagents.

Topic: Chemistry, Aldehydes, Ketones and Carboxylic Acids, NEET
What role does cellulose play in the formation of semi-synthetic polymers?

Options:
A Cellulose is the monomer in semi-synthetic polymers.
B Cellulose is a catalyst used in the synthesis of semi-synthetic polymers.
C Cellulose serves as the source material for semi-synthetic polymers.
D Cellulose is a byproduct in the production of semi-synthetic polymers.

The correct answer is:
Cellulose serves as the source material for semi-synthetic polymers.

Solution:
Cellulose serves as the source material for the production of semi-synthetic polymers like rayon.

Topic: Chemistry, Polymers, NEET
What role does chromic acid play in the oxidation of phenol?

Options:
A Provides oxygen for oxidation
B Acts as a catalyst
C Neutralises the reaction
D Reduces the reaction rate

The correct answer is:
Provides oxygen for oxidation

Solution:
Chromic acid provides oxygen for the oxidation of phenol.

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
What role does coke play in the extraction of copper from its oxide?

Options:
A Acts as a catalyst
B Facilitates oxidation
C Facilitates reduction
D Acts as a flux

The correct answer is:
Facilitates reduction

Solution:
Coke facilitates the reduction of copper oxide to metallic copper during the extraction process.

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
What role does concentrated alkali play in the Cannizzaro reaction?

Options:
A It acts as a catalyst.
B It acts as a reducing agent.
C It acts as an oxidizing agent.
D It does not play a role in the reaction.

The correct answer is:
It acts as a catalyst.

Solution:
Concentrated alkali acts as a catalyst in the Cannizzaro reaction, facilitating the self-oxidation and reduction of aldehydes.

Topic: Chemistry, Aldehydes, Ketones and Carboxylic Acids, NEET
What role does hydrogen peroxide play in pollution control?

Options:
A It is a source of pollution
B It helps in the formation of pollutants
C It is used for oxidation of pollutants and in sewage treatment
D It has no role in pollution control

The correct answer is:
It is used for oxidation of pollutants and in sewage treatment

Solution:
Hydrogen peroxide is used in pollution control for the oxidation of pollutants and in sewage treatment to restore aerobic conditions to sewage wastes.

Topic: Chemistry, Hydrogen, NEET
What role does ice's open structure with wide holes play in its thermal properties?

Options:
A It makes ice a good conductor of heat.
B It makes ice a poor conductor of heat.
C It has no effect on ice's thermal properties.
D It makes ice magnetic.

The correct answer is:
It makes ice a poor conductor of heat.

Solution:
Ice's open structure with wide holes makes it a poor conductor of heat.

Topic: Chemistry, Hydrogen, NEET
What role does kinetic energy play in the viscosity of a liquid?

Options:
A Kinetic energy has no effect on viscosity
B Higher kinetic energy leads to higher viscosity
C Higher kinetic energy leads to lower viscosity
D Kinetic energy transforms the liquid into a gas

The correct answer is:
Higher kinetic energy leads to lower viscosity

Solution:
Higher kinetic energy of molecules, which occurs at high temperature, leads to lower viscosity in a liquid.

Topic: Chemistry, States of Matter, NEET
What role does limestone play in the conversion of cast iron to wrought iron?

Options:
A Acts as a reducing agent
B Acts as a flux
C Prevents oxidation
D Promotes oxidation

The correct answer is:
Acts as a flux

Solution:
Limestone is added as a flux during the conversion process, aiding in the removal of impurities.

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
What role does Na3AlF6 or CaF2 play in the aluminium metallurgy process?

Options:
A Increases melting point
B Reduces conductivity
C Lowers melting point
D Decreases reactivity

The correct answer is:
Lowers melting point

Solution:
Na3AlF6 or CaF2 is added to decrease the melting point of the mixture.

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET