datavorous/entrance-exam-dataset huggingface dataset:
What does a negative ∆H value indicate in a chemical reaction?

Options:
A The reaction is endothermic.
B The reaction is exothermic.
C The reaction is at equilibrium.
D The reaction has no enthalpy change.

The correct answer is:
The reaction is exothermic.

Solution:
A negative ∆H value indicates that the reaction releases heat (exothermic) to the surroundings.

Topic: Chemistry, Thermodynamics (C), NEET
What does a negative value of electron gain enthalpy indicate?

Options:
A Energy is absorbed during the process.
B Energy is released during the process.
C The process is exothermic.
D The process is endothermic.

The correct answer is:
Energy is released during the process.

Solution:
Electron gain enthalpy is negative when energy is released during the process of adding an electron to an atom.

Topic: Chemistry, Classification of Elements and Periodicity in Properties, NEET
What does a negative value of ∆G indicate about the spontaneity of a process?

Options:
A The process is spontaneous.
B The process is non-spontaneous.
C The process is at equilibrium.
D The process is reversible.

The correct answer is:
The process is spontaneous.

Solution:
A negative value of ∆G indicates that the process is spontaneous.

Topic: Chemistry, Thermodynamics (C), NEET
What does a positive electrovalence indicate for an ion?

Options:
A It has gained electrons.
B It has lost electrons.
C It has an equal number of protons and electrons.
D It is a noble gas.

The correct answer is:
It has lost electrons.

Solution:
A positive electrovalence indicates that an ion has lost electrons.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
What does a positive enthalpy change (∆rH) for a reaction indicate?

Options:
A The reaction is exothermic.
B The reaction is spontaneous.
C The reaction absorbs heat.
D The reaction releases heat.

The correct answer is:
The reaction absorbs heat.

Solution:
A positive enthalpy change (∆rH) for a reaction indicates that the reaction absorbs heat, making it an endothermic process.

Topic: Chemistry, Thermodynamics (C), NEET
What does a positive Eo value for a redox couple indicate?

Options:
A The redox couple is a stronger reducing agent than the H+ / H2 couple.
B The redox couple is a weaker reducing agent than the H+ / H2 couple.
C The redox couple is in equilibrium with the H+ / H2 couple.
D The redox couple does not participate in electron transfer reactions.

The correct answer is:
The redox couple is a weaker reducing agent than the H+ / H2 couple.

Solution:
A positive Eo value indicates that the redox couple is a weaker reducing agent than the H+ / H2 couple.

Topic: Chemistry, Electrochemistry, NEET
What does a positive value of work (w) in a pressure-volume work calculation indicate?

Options:
A Work done on the system
B Work done by the system
C No work done
D A change in temperature

The correct answer is:
Work done by the system

Solution:
A positive value of work in a pressure-volume work calculation indicates that work is done by the system on the surroundings.

Topic: Chemistry, Thermodynamics (C), NEET
What does a reaction mechanism describe?

Options:
A The color changes in a reaction
B The sequence of bond formation only
C The sequence of each step in a reaction, including electron movement and energetics
D The temperature at which a reaction occurs

The correct answer is:
The sequence of each step in a reaction, including electron movement and energetics

Solution:
A reaction mechanism describes a sequential account of each step in a reaction, including electron movement, energetics, and kinetics.

Topic: Chemistry, General Organic Chemistry, NEET
What does 'A' represent in the Arrhenius equation?

Options:
A Gas constant
B Activation energy
C Rate constant
D Pre-exponential factor

The correct answer is:
Pre-exponential factor

Solution:
'A' in Arrhenius equation is the Arrhenius factor or pre-exponential factor, which is a constant specific to a particular reaction.

Topic: Chemistry, Chemical Kinetics, NEET
What does a single dash represent in a structural formula?

Options:
A A single bond
B A double bond
C A triple bond
D A lone pair of electrons

The correct answer is:
A single bond

Solution:
A single dash represents a single bond in a structural formula.

Topic: Chemistry, General Organic Chemistry, NEET
What does a solid-wedge represent in the 3-D representation of molecules?

Options:
A A bond projecting away from the observer
B A bond projecting out of the plane of paper towards the observer
C A bond lying in the plane of paper
D A bond with a broad end away from the observer

The correct answer is:
A bond projecting out of the plane of paper towards the observer

Solution:
A solid-wedge is used to indicate a bond projecting out of the plane of paper, towards the observer.

Topic: Chemistry, General Organic Chemistry, NEET
What does a white precipitate that is soluble in ammonium hydroxide indicate in the test for halogens?

Options:
A The presence of nitrogen
B The presence of sulfur
C The presence of chlorine
D The presence of iodine

The correct answer is:
The presence of chlorine

Solution:
A white precipitate, soluble in ammonium hydroxide, indicates the presence of chlorine.

Topic: Chemistry, General Organic Chemistry, NEET
What does a yellow precipitate that is insoluble in ammonium hydroxide indicate in the test for halogens?

Options:
A The presence of nitrogen
B The presence of sulfur
C The presence of chlorine
D The presence of iodine

The correct answer is:
The presence of iodine

Solution:
A yellow precipitate that is insoluble in ammonium hydroxide indicates the presence of iodine.

Topic: Chemistry, General Organic Chemistry, NEET
What does a yellowish precipitate that is sparingly soluble in ammonium hydroxide indicate in the test for halogens?

Options:
A The presence of nitrogen
B The presence of sulfur
C The presence of chlorine
D The presence of bromine

The correct answer is:
The presence of bromine

Solution:
A yellowish precipitate, sparingly soluble in ammonium hydroxide, indicates the presence of bromine.

Topic: Chemistry, General Organic Chemistry, NEET
What does a zero order reaction indicate about the relationship between the rate of reaction and the concentration of reactants?

Options:
A The rate of reaction increases linearly with the concentration of reactants.
B The rate of reaction decreases with increasing concentration of reactants.
C The rate of reaction is independent of the concentration of reactants.
D The rate of reaction is inversely proportional to the concentration of reactants.

The correct answer is:
The rate of reaction is independent of the concentration of reactants.

Solution:
A zero order reaction means that the rate of reaction is independent of the concentration of reactants.

Topic: Chemistry, Chemical Kinetics, NEET
What does a zero reading on the voltmeter indicate in the Daniell cell?

Options:
A The cell is not functioning
B Equilibrium has been attained
C The circuit is open
D The voltmeter is faulty

The correct answer is:
Equilibrium has been attained

Solution:
A zero reading on the voltmeter indicates that equilibrium has been attained in the Daniell cell.

Topic: Chemistry, Electrochemistry, NEET
What does A,B, and C represent in the given figure?

Options:
A Transcription start site, Coding strand, Template strand
B Transcription start site, Template strand, Coding strand
C Template strand, Transcription start site, Coding strand
D Coding strand, Template strand, Transcription start site

The correct answer is:
Transcription start site, Template strand, Coding strand

Solution:
In the above figure, A, B and C represents Transcription start site, Template strand, Coding strand

Topic: Biology, Molecular Basis of Inheritance, NEET
What does A,B and C represents in the following figure?

Options:
A Stabilising, Directional, Disruptive
B Directional, Disruptive, Stabilising
C Directional, Stabilising, Disruptive
D None of the above

The correct answer is:
Stabilising, Directional, Disruptive

Solution:
In the above figure, A, B and C represents Stabilising, Directional and Disruptive

Topic: Biology, Evolution, NEET
What does A,B represent here respectively.

Options:
A Rana, Salamandra
B Salamandra, Rana
C Bufo, Hyla
D Ichthyophis, Hyla

The correct answer is:
Salamandra, Rana

Solution:
Salmandra, Rana belongs to class- Amphibia

Topic: Biology, Animal Kingdom, NEET
What does A,B represent here respectively.

Options:
A Pavo, psittacula
B psittacula, Pavo
C Neophron, Struthio
D None of the above

The correct answer is:
psittacula, Pavo

Solution:
psittacula(parrot), Pavo(peacock) belong to class- Aves.

Topic: Biology, Animal Kingdom, NEET
What does abscisic acid (ABA) act as for plants?

Options:
A General plant growth stimulator
B Inhibitor of plant metabolism
C Stimulator of seed germination
D Promoter of stomata closure

The correct answer is:
Inhibitor of plant metabolism

Solution:
ABA acts as a general plant growth inhibitor and an inhibitor of plant metabolism.

Topic: Biology, Plant - Growth and Development, NEET
What does acid rain do to water pipes?

Options:
A Cleans and purifies them
B Causes corrosion and leaching of heavy metals
C Has no effect on water pipes
D Increases water pressure

The correct answer is:
Causes corrosion and leaching of heavy metals

Solution:
Acid rain can cause corrosion in water pipes and lead to the leaching of heavy metals, such as iron, lead, and copper, into the drinking water.

Topic: Chemistry, Environmental Chemistry, NEET
What does acidified permanganate solution oxidize nitrites to?

Options:
A Nitrous oxide
B Nitrogen gas
C Nitric oxide
D Nitrates

The correct answer is:
Nitrates

Solution:
Acidified permanganate solution oxidizes nitrites to nitrates.

Topic: Chemistry, d and f Block Elements, NEET
What does AIDS stand for?

Options:
A Acquired Immuno Deficiency System
B Acquired Immune Deficiency Syndrome
C Acquired Immune System Disease
D Acquired Infectious Deficiency Syndrome

The correct answer is:
Acquired Immune Deficiency Syndrome

Solution:
The acronym AIDS stands for Acquired Immune Deficiency Syndrome, which indicates a deficiency of the immune system acquired during an individual's lifetime.

Topic: Biology, Human Health and Diseases, NEET
What does AIDS stand for?

Options:
A Acquired Immunity Deficiency Syndrome
B Acquired Immune Deficiency Syndrome
C Active Immunity Deficiency Syndrome
D Active Immune Deficiency Syndrome

The correct answer is:
Acquired Immune Deficiency Syndrome

Solution:
AIDS stands for Acquired Immune Deficiency Syndrome, which means a deficiency of the immune system acquired during the lifetime of an individual indicating that it is not a congenital disease.

Topic: Biology, Human Health and Diseases, NEET
What does an empirical formula represent in a compound?

Options:
A The exact number of different types of atoms
B The simplest whole number ratio of atoms
C The molecular weight of the compound
D The molecular structure of the compound

The correct answer is:
The simplest whole number ratio of atoms

Solution:
An empirical formula represents the simplest whole number ratio of various atoms present in a compound.

Topic: Chemistry, Some Basic Concepts of Chemistry, NEET
What does an increase in pressure do to liquid carbon dioxide?

Options:
A It causes it to evaporate.
B It compresses the liquid.
C It changes the color of the liquid.
D It freezes the liquid.

The correct answer is:
It compresses the liquid.

Solution:
An increase in pressure simply compresses the liquid carbon dioxide.

Topic: Chemistry, States of Matter, NEET
What does an organism represent/occupy in the system of classification?

Options:
A A place or position
B A specific role
C A specific function
D A specific characteristic

The correct answer is:
A place or position

Solution:
An organism represents/occupies a place or position in the system of classification.

Topic: Biology, The Living World, NEET
What does "Anti" in "Antibiotics" mean?

Options:
A For
B Against
C Neither for nor against
D Pro

The correct answer is:
Against

Solution:
Anti is a Greek word that means ‘against’, and together with the word bio (meaning "life"), they mean ‘against life’ (in the context of disease-causing organisms).

Topic: Biology, Microbes in Human Welfare, NEET
What does Arrhenius theory define as acids and bases in terms of the ions they produce in water?

Options:
A Acids produce H+ ions, and bases produce OH- ions.
B Acids produce OH-ions, and bases produce H+ions.
C Both acids and bases produce H+ ions.
D Both acids and bases produce OH- ions.

The correct answer is:
Acids produce H+ ions, and bases produce OH- ions.

Solution:
According to Arrhenius theory, acids produce H+ ions, and bases produce OH- ions in water.

Topic: Chemistry, Ionic Equilibrium, NEET
What does ART include?

Options:
A Include social awareness programmes to educate people about reproductive health and diseases.
B Include research organisation working to produce new and more effective contraceptives for birth control
C Include a number of special techniques which assist infertile couples to have children.
D Both (B) and (C).

The correct answer is:
Include a number of special techniques which assist infertile couples to have children.

Solution:
Inability to conceive or produce children even after unprotected sexual intercourse is called infertility. Specialised infertility clinics can help in diagnosis and proper treatment of infertile couples. But, when such treatment is not possible, the couples can be assisted to have children through certain special techniques like In-vitro fertilization, intracytoplasmic sperm injection, cryopreservation of gametes or embryos, etc. called assisted reproductive technologies (ART).

Topic: Biology, Reproductive Health, NEET
What does atomic radius and ionic radius really mean to you?

Options:
A Atomic radius refers to the size of an atom, while ionic radius refers to the size of an ion formed from an atom by gaining/losing electrons.
B Atomic radius and ionic radius are the same concept, referring to the size of an atom.
C Atomic radius refers to the size of a positively charged ion, while ionic radius refers to the size of a negatively charged ion.
D Atomic radius refers to the size of a neutral atom, while ionic radius refers to the size of a molecule.

The correct answer is:
Atomic radius refers to the size of an atom, while ionic radius refers to the size of an ion formed from an atom by gaining/losing electrons.

Solution:
Correct Option is : (A)
Atomic radius refers to the size of an atom, while ionic radius refers to the size of an ion formed from an atom by gaining/losing electrons.

Topic: Chemistry, Classification of Elements and Periodicity in Properties, NEET
What does Avogadro's law state regarding the relationship between the volume of gases, the number of molecules, and the conditions of temperature and pressure?

Options:
A Equal volumes of all gases contain an equal number of molecules.
B Volume is inversely proportional to the number of molecules.
C Gases with different volumes have the same number of molecules.
D Volume depends on temperature, not the number of molecules.

The correct answer is:
Equal volumes of all gases contain an equal number of molecules.

Solution:
Avogadro's law states that equal volumes of all gases under the same conditions of temperature and pressure contain an equal number of molecules.

Topic: Chemistry, States of Matter, NEET
What does BOD refer to?

Options:
A The amount of oxygen that would be consumed if all the organic matter in one liter of water were oxidised by bacteria
B The rate of uptake of oxygen by micro-organisms in a sample of water
C The pollution potential of waste water
D The physical removal of particles

The correct answer is:
The amount of oxygen that would be consumed if all the organic matter in one liter of water were oxidised by bacteria

Solution:
BOD refers to the amount of the oxygen that would be consumed if all the organic matter in one liter of water were oxidised by bacteria.

Topic: Biology, Microbes in Human Welfare, NEET
What does bond enthalpy measure?

Options:
A The strength of a chemical bond
B The length of a chemical bond
C The number of chemical bonds
D The color of a chemical bond

The correct answer is:
The strength of a chemical bond

Solution:
Bond enthalpy measures the strength of a chemical bond

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
What does bond length represent in a molecule?

Options:
A The shortest distance between two atoms
B The distance between the valence electrons of two atoms
C The distance between the nuclei of two bonded atoms at equilibrium
D The distance between the innermost shells of two atoms

The correct answer is:
The distance between the nuclei of two bonded atoms at equilibrium

Solution:
Bond length in a molecule represents the distance between the nuclei of two bonded atoms at equilibrium.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
What does cellulose give on complete hydrolysis?

Options:
A D-ribose
B D-glucose
C L-glucose
D D-fructose

The correct answer is:
D-glucose

Solution:
Cellulose is a linear polymer of β-D-glucose in which C1 of one glucose unit is connected to C4 of the other through glycosidic linkage.

It does not undergo hydrolysis easily. However on heating with dilute H2SO4 under pressure. It does undergo hydrolysis to give only D-glucose.

C6H10O5n+nH2O→H+2C6H12O6D-Glucose

Topic: Chemistry, Biomolecules, NEET
What does chemical kinetics discuss at the molecular level?

Options:
A Molecular structures of compounds
B Energy levels of reactants and products
C Reaction mechanisms involving orientation and energy of molecules during collisions
D Thermodynamic properties of reactions

The correct answer is:
Reaction mechanisms involving orientation and energy of molecules during collisions

Solution:
At the molecular level, chemical kinetics discusses the reaction mechanisms, including the orientation and energy of molecules undergoing collisions.

Topic: Chemistry, Chemical Kinetics, NEET
What does chemical kinetics primarily focus on?

Options:
A Thermodynamics of reactions
B Feasibility of reactions
C Rate of reactions
D Molecular structures of compounds

The correct answer is:
Rate of reactions

Solution:
Chemical kinetics deals with the study of reaction rates.

Topic: Chemistry, Chemical Kinetics, NEET
What does collision theory provide insight into?

Options:
A Thermodynamics of reactions
B Energetic and mechanistic aspects of reactions
C Equilibrium constants of reactions
D Quantum mechanics of reactions

The correct answer is:
Energetic and mechanistic aspects of reactions

Solution:
Collision theory provides greater insight into the energetic and mechanistic aspects of reactions.

Topic: Chemistry, Chemical Kinetics, NEET
What does colostrum contain that is essential for the new-born babies?

Options:
A Oxytocin
B Antibodies
C Parturition
D Maturation

The correct answer is:
Antibodies

Solution:
Colostrum contains several antibodies that are essential to develop resistance for the new-born babies.

Topic: Biology, Human Reproduction, NEET
What does concentration of a species in a gaseous reaction at constant temperature depend on?

Options:
A Temperature
B Volume
C Partial pressure
D Stoichiometric coefficients

The correct answer is:
Partial pressure

Solution:
The concentration is directly proportional to the partial pressure of a species in a gaseous reaction.

Topic: Chemistry, Chemical Kinetics, NEET
What does Dalton's law of partial pressure state?

Options:
A The total pressure is always greater than the sum of the partial pressures.
B The total pressure is less than the sum of the partial pressures.
C The total pressure is equal to the sum of the partial pressures.
D The total pressure is unrelated to the partial pressures.

The correct answer is:
The total pressure is equal to the sum of the partial pressures.

Solution:
Dalton's law of partial pressure states that the total pressure exerted by a mixture of non-reactive gases is equal to the sum of the partial pressures of individual gases.

Topic: Chemistry, States of Matter, NEET
What does Darwin's theory of evolution propose as the driving force behind the development of new species?

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

The correct answer is:
Adaptation

Solution:
Darwin's theory of evolution proposes that the driving force behind the development of new species is adaptation, where variations that make resource utilization better for a few (adapted to the habitat better) will enable only those to reproduce and leave more progeny, leading to a change in population characteristics and new forms appearing to arise.

Topic: Biology, Evolution, NEET
What does deVries propose as the driving force behind the development of new species?

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

The correct answer is:
Mutations

Solution:
deVries proposed that the driving force behind the development of new species is mutations, which he believed caused speciation and hence called it saltation (single step large mutation)

Topic: Biology, Evolution, NEET
What does dissociation refer to in the context of ionization?

Options:
A The process of separation of ions in water already existing as such in the solid state of the solute
B The process of neutral molecules splitting into charged ions in solution
C The change in color of litmus paper
D The process of bonding between ions in a solution

The correct answer is:
The process of separation of ions in water already existing as such in the solid state of the solute

Solution:
The paragraph explains that dissociation refers to the process of separating ions in water that already exist as such in the solid state of the solute.

Topic: Chemistry, Ionic Equilibrium, NEET
What does 'Ea' represent in the Arrhenius equation?

Options:
A Gas constant
B Activation energy
C Rate constant
D Pre-exponential factor

The correct answer is:
Activation energy

Solution:
'Ea' in Arrhenius equation represents activation energy, which is measured in joules per mole (J mol^–1).

Topic: Chemistry, Chemical Kinetics, NEET
What does each bar in the energy pyramid indicate?

Options:
A The amount of energy present at each trophic level
B The amount of energy lost as heat at each step
C The total energy in the ecosystem
D The energy in a given time or annually per unit area

The correct answer is:
The energy in a given time or annually per unit area

Solution:
Each bar in the energy pyramid indicates the amount of energy present at each trophic level in a given time or annually per unit area.

Topic: Biology, Ecosystem, NEET
What does each electron in an atom have associated with it?

Options:
A An electric charge
B A permanent spin and an orbital magnetic moment
C A fixed position in the nucleus
D A high energy level

The correct answer is:
A permanent spin and an orbital magnetic moment

Solution:
Each electron in an atom has associated with it a permanent spin and an orbital magnetic moment.

Topic: Chemistry, Solid State, NEET
What does each lattice point in a crystal lattice represent?

Options:
A A repeating pattern
B A structural motif
C A constituent particle, which may be an atom, a molecule, or an ion
D A void or empty space

The correct answer is:
A constituent particle, which may be an atom, a molecule, or an ion

Solution:
Each lattice point in a crystal lattice represents a constituent particle, which may be an atom, a molecule (group of atoms), or an ion, as stated in the paragraph.

Topic: Chemistry, Solid State, NEET
What does each rank or taxon in the taxonomic hierarchy represent?

Options:
A A unit of classification
B A morphological aggregate
C A distinct biological entity
D A group of organisms

The correct answer is:
A unit of classification

Solution:
Each rank or taxon in the taxonomic hierarchy represents a unit of classification, which is a way of grouping organisms based on shared characteristics.

Topic: Biology, The Living World, NEET