datavorous/entrance-exam-dataset huggingface dataset:
What is the primary consequence of adding excessive organic matter to water?

Options:
A Increased dissolved oxygen
B Improved water quality
C Death of oxygen-dependent aquatic life
D Enhanced growth of aerobic bacteria

The correct answer is:
Death of oxygen-dependent aquatic life

Solution:
Excessive organic matter in water depletes oxygen, leading to the death of oxygen-dependent aquatic life.

Topic: Chemistry, Environmental Chemistry, NEET
What is the primary consequence of the lanthanoid contraction on the third transition series?

Options:
A It causes irregularities in atomic radii.
B It causes irregularities in ionic radii.
C It makes the elements more reactive.
D It makes the elements very similar in size to the second series.

The correct answer is:
It makes the elements very similar in size to the second series.

Solution:
The lanthanoid contraction causes the radii of the third transition series to be "very similar to those of the corresponding members of the second series."

Topic: Chemistry, d and f Block Elements, NEET
What is the primary consideration for classifying drugs on the basis of chemical structure?

Options:
A Their pharmacological activity
B Their chemical composition
C Their color
D Their biological origin

The correct answer is:
Their chemical composition

Solution:
This classification is based on the chemical structure of the drug.

Topic: Chemistry, Chemistry in Everyday Life, NEET
What is the primary constituent of the product known as copper matte?

Options:
A Cu2S
B FeS
C CuO
D Both A and B

The correct answer is:
Both A and B

Solution:
Copper matte primarily contains copper sulfide, Cu2S, and iron sulfide, FeS.

Topic: Chemistry, General Principles and Processes of Isolation of Metals, NEET
What is the primary constriction on a chromosome called?

Options:
A Chromosome constriction
B Chromosome disc
C Centromere
D Kinetochore

The correct answer is:
Centromere

Solution:
The primary constriction on a chromosome is called the centromere. This is the point on the chromosome where the two chromatids are held together.

Topic: Biology, Cell - The Unit of Life, NEET
What is the primary criterion for a compound to be suitable for purification by sublimation?

Options:
A It should have a low sublimation point.
B It should be a liquid at room temperature.
C It should have high sublimation point.
D It should be volatile.

The correct answer is:
It should have high sublimation point.

Solution:
Compounds suitable for purification by sublimation should have a high sublimation point, meaning they can change from solid to vapor at relatively high temperatures.

Topic: Chemistry, General Organic Chemistry, NEET
What is the primary difference between adsorption and absorption?

Options:
A Adsorption occurs at the surface, while absorption is uniform throughout the bulk.
B Adsorption is uniform throughout the bulk, while absorption occurs at the surface.
C Both occur only at the surface.
D Both occur uniformly throughout the bulk.

The correct answer is:
Adsorption occurs at the surface, while absorption is uniform throughout the bulk.

Solution:
The paragraph clearly states that in adsorption, the substance is concentrated only at the surface, while in absorption, the substance is uniformly distributed throughout the bulk.

Topic: Chemistry, Surface Chemistry, NEET
What is the primary difference between alkynes reduced with Lindlar's catalyst and alkynes reduced with sodium in liquid ammonia?

Options:
A Lindlar's catalyst yields cis alkenes, while sodium in liquid ammonia yields trans alkenes.
B Lindlar's catalyst yields trans alkenes, while sodium in liquid ammonia yields cis alkenes.
C Lindlar's catalyst yields alkanes, while sodium in liquid ammonia yields alkenes.
D Lindlar's catalyst yields alkenes, while sodium in liquid ammonia yields alkynes.

The correct answer is:
Lindlar's catalyst yields cis alkenes, while sodium in liquid ammonia yields trans alkenes.

Solution:
The primary difference is the geometry of the alkenes produced; Lindlar's catalyst produces cis alkenes, while sodium in liquid ammonia produces trans alkenes.

Topic: Chemistry, Hydrocarbons, NEET
What is the primary difference between amorphous solids and polycrystalline solids?

Options:
A Polycrystalline solids have a single crystal structure.
B Amorphous solids are highly transparent.
C Polycrystalline solids have microcrystalline structures.
D Amorphous solids are isotropic.

The correct answer is:
Polycrystalline solids have microcrystalline structures.

Solution:
The primary difference between amorphous solids and polycrystalline solids is that polycrystalline solids have microcrystalline structures, as mentioned in the paragraph.

Topic: Chemistry, Solid State, NEET
What is the primary difference between bonding and antibonding molecular orbitals?

Options:
A Bonding orbitals are filled, while antibonding orbitals are empty.
B Bonding orbitals have lower energy and greater stability.
C Bonding orbitals are formed from s orbitals, while antibonding orbitals are formed from p orbitals.
D Antibonding orbitals are always fully occupied.

The correct answer is:
Bonding orbitals have lower energy and greater stability.

Solution:
The bonding molecular orbitals have lower energy and greater stability compared to antibonding molecular orbitals.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
What is the primary difference between covalent and ionic bonds?

Options:
A Covalent bonds are non-directional, while ionic bonds are directional.
B Covalent bonds are directional, while ionic bonds are non-directional.
C Covalent bonds and ionic bonds are both non-directional.
D Covalent bonds and ionic bonds are both directional.

The correct answer is:
Covalent bonds are directional, while ionic bonds are non-directional.

Solution:
Correct Option is : (B)
Covalent bonds are directional, while ionic bonds are non-directional.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
What is the primary difference between crystalline and amorphous solids?

Options:
A Crystalline solids have long-range order, while amorphous solids have short-range order.
B Crystalline solids are transparent, while amorphous solids are opaque.
C Crystalline solids are always soft, while amorphous solids are always hard.
D Crystalline solids have no order, while amorphous solids have long-range order.

The correct answer is:
Crystalline solids have long-range order, while amorphous solids have short-range order.

Solution:
The primary difference between crystalline and amorphous solids is that crystalline solids have long-range order, while amorphous solids have short-range order, as mentioned in the paragraph.

Topic: Chemistry, Solid State, NEET
What is the primary difference between double salts and complexes?

Options:
A Double salts are always insoluble, while complexes are soluble.
B Double salts dissociate into simple ions, while complexes do not.
C Double salts contain only one type of ion, while complexes contain multiple ions.
D Double salts are stoichiometric, while complexes are non-stoichiometric.

The correct answer is:
Double salts dissociate into simple ions, while complexes do not.

Solution:
The primary difference between double salts and complexes is that double salts dissociate into simple ions when dissolved in water, whereas complexes do not.

Topic: Chemistry, Coordination Compounds, NEET
What is the primary difference between order and molecularity of a reaction?

Options:
A Order is an experimental quantity, while molecularity is a theoretical quantity.
B Order is applicable only to complex reactions, while molecularity applies to elementary reactions.
C Order can be zero or a fraction, while molecularity cannot be zero or a non-integer.
D Order is determined by the rate-determining step, while molecularity is determined by the overall reaction rate.

The correct answer is:
Order can be zero or a fraction, while molecularity cannot be zero or a non-integer.

Solution:
The order of a reaction can be zero or a fraction, but molecularity cannot.

Topic: Chemistry, Chemical Kinetics, NEET
What is the primary difference between strong electrolytes and weak electrolytes in terms of ionization?

Options:
A Strong electrolytes are partially ionized, while weak electrolytes are not ionized at all.
B Strong electrolytes are not ionized at all, while weak electrolytes are partially ionized.
C Strong electrolytes are ionized almost completely, while weak electrolytes are only partially dissociated.
D Strong electrolytes and weak electrolytes have the same degree of ionization.

The correct answer is:
Strong electrolytes are ionized almost completely, while weak electrolytes are only partially dissociated.

Solution:
The paragraph explains that strong electrolytes are almost completely ionized, whereas weak electrolytes are only partially dissociated.

Topic: Chemistry, Ionic Equilibrium, NEET
What is the primary difference between the Lewis concept and the Brönsted-Lowry concept in terms of acids?

Options:
A In the Lewis concept, many acids have protons.
B In the Lewis concept, all acids have protons.
C In the Lewis concept, acids are always neutral species.
D In the Lewis concept, many acids do not have protons.

The correct answer is:
In the Lewis concept, many acids do not have protons.

Solution:
The primary difference between the Lewis concept and the Brönsted-Lowry concept is that in the Lewis concept, many acids do not have protons.

Topic: Chemistry, Ionic Equilibrium, NEET
What is the primary difference in the efficiency of ATP production between fermentation and aerobic respiration?

Options:
A There is no difference in the efficiency of ATP production between fermentation and aerobic respiration.
B Fermentation is more efficient than aerobic respiration in terms of ATP production.
C Aerobic respiration is more efficient than fermentation in terms of ATP production.
D The efficiency of ATP production depends on various other factors and cannot be compared between fermentation and aerobic respiration.

The correct answer is:
Aerobic respiration is more efficient than fermentation in terms of ATP production.

Solution:
In fermentation, there is a net gain of only two molecules of ATP for each molecule of glucose degraded to pyruvic acid, whereas many more molecules of ATP are generated under aerobic conditions.

Topic: Biology, Respiration in Plants, NEET
What is the primary difference in the energies of orbitals in multi-electron atoms compared to hydrogen or hydrogen-like species?

Options:
A The energies depend only on the quantum number n
B The energies depend only on the quantum number l
C The energies depend on both quantum numbers n and l
D The energies are constant and do not depend on quantum numbers

The correct answer is:
The energies depend on both quantum numbers n and l

Solution:
The energies of the orbitals in multi-electron atoms depend on both quantum numbers n and l, unlike the orbitals of hydrogen or hydrogen-like species, whose energies depend only on the quantum number n.

Topic: Chemistry, Structure of Atom, NEET
What is the primary difference in the oxidation reactions between aldehydes and ketones?

Options:
A Aldehydes are not oxidised
B Ketones are more easily oxidised than aldehydes
C Aldehydes are easily oxidised to carboxylic acids, while ketones are not
D Ketones are easily oxidised to aldehydes, while aldehydes are not

The correct answer is:
Aldehydes are easily oxidised to carboxylic acids, while ketones are not

Solution:
The primary difference in the oxidation reactions between aldehydes and ketones is that aldehydes are easily oxidised to carboxylic acids, while ketones are not as easily oxidised.

Topic: Chemistry, Aldehydes, Ketones and Carboxylic Acids, NEET
What is the primary effect of a vacancy defect in a crystal?

Options:
A It increases the density of the substance.
B It decreases the density of the substance.
C It causes dislocations in the crystal lattice.
D It results in the addition of foreign atoms.

The correct answer is:
It decreases the density of the substance.

Solution:
A vacancy defect in a crystal decreases the density of the substance.

Topic: Chemistry, Solid State, NEET
What is the primary effect of an interstitial defect in a crystal?

Options:
A It increases the density of the substance.
B It decreases the density of the substance.
C It causes dislocations in the crystal lattice.
D It results in the addition of foreign atoms.

The correct answer is:
It increases the density of the substance.

Solution:
An interstitial defect in a crystal increases the density of the substance.

Topic: Chemistry, Solid State, NEET
What is the primary effect of enzyme inhibitors?

Options:
A Enhancing enzyme activity
B Blocking enzyme synthesis
C Preventing substrate binding and catalytic activity
D Promoting enzyme degradation

The correct answer is:
Preventing substrate binding and catalytic activity

Solution:
Enzyme inhibitors can block the binding site of the enzyme and prevent the binding of substrate, or they can inhibit the catalytic activity of the enzyme.

Topic: Chemistry, Chemistry in Everyday Life, NEET
What is the primary effect of narcotic analgesics like morphine when administered in medicinal doses?

Options:
A Producing stupor
B Relieving pain and producing sleep
C Inducing convulsions
D Causing death

The correct answer is:
Relieving pain and producing sleep

Solution:
Narcotic analgesics like morphine relieve pain and produce sleep when administered in medicinal doses.

Topic: Chemistry, Chemistry in Everyday Life, NEET
What is the primary effect of particulate pollutants on human health?

Options:
A All particulate pollutants have the same health effects.
B Particulate pollutants primarily affect skin health.
C The effects depend on the particle size, with dust, fumes, and mists being dangerous for human health.
D Particulate pollutants do not have any health effects.

The correct answer is:
The effects depend on the particle size, with dust, fumes, and mists being dangerous for human health.

Solution:
Particulate pollutants have varying health effects, primarily dependent on the particle size, with larger particles potentially causing different health issues than smaller ones.

Topic: Chemistry, Environmental Chemistry, NEET
What is the primary effect of salvarsan on the bacteria spirochete, which causes syphilis?

Options:
A It has no effect on spirochete
B It is less toxic to spirochete than to human beings
C It is more toxic to spirochete than to human beings
D It stimulates the growth of spirochete

The correct answer is:
It is more toxic to spirochete than to human beings

Solution:
Salvarsan is toxic to human beings, but its effect on the bacteria spirochete, which causes syphilis, is much greater than on human beings.

Topic: Chemistry, Chemistry in Everyday Life, NEET
What is the primary environmental concern associated with the improper disposal of non-degradable industrial solid wastes?

Options:
A Water pollution
B Air pollution
C Soil erosion
D Noise pollution

The correct answer is:
Air pollution

Solution:
The improper disposal of non-degradable industrial solid wastes can lead to air pollution, which can have detrimental effects on the environment and human health.

Topic: Chemistry, Environmental Chemistry, NEET
What is the primary factor affecting the binding of O₂ with haemoglobin?

Options:
A Partial pressure of CO₂
B Hydrogen ion concentration
C Temperature
D Partial pressure of O₂

The correct answer is:
Partial pressure of O₂

Solution:
The binding of O₂ with haemoglobin is primarily related to the partial pressure of O₂ (pO₂).

Topic: Biology, Breathing and Exchange of Gases, NEET
What is the primary factor contributing to the trend in Eo values for M2+/M?

Options:
A Atomic number
B Atomic size
C Ionization enthalpy
D Sum of first and second ionization enthalpies

The correct answer is:
Sum of first and second ionization enthalpies

Solution:
The in Eo values for M2+/M is related to the increase in the sum of the first and second ionization enthalpies.

Topic: Chemistry, d and f Block Elements, NEET
What is the primary factor for binding of oxygen with haemoglobin?

Options:
A pO₂
B pCO₂
C H⁺ concentration
D Temperature

The correct answer is:
pO₂

Solution:
Binding of oxygen with haemoglobin is primarily related to partial pressure of O₂.

Topic: Biology, Breathing and Exchange of Gases, NEET
What is the primary factor responsible for beryllium's (Be) reducing nature?

Options:
A High atomic number of Be.
B Large atomic radius of Be.
C Strong metallic bonds in Be.
D Hydration energy associated with Be2+ ion.

The correct answer is:
Hydration energy associated with Be2+ ion.

Solution:
Beryllium's reducing nature is primarily due to the large hydration energy associated with the small Be2+ ion.

Topic: Chemistry, s Block Elements, NEET
What is the primary factor responsible for global warming?

Options:
A Increased solar radiation absorption by Earth
B Greenhouse gases trapping heat
C Volcanic activity
D Deforestation

The correct answer is:
Greenhouse gases trapping heat

Solution:
Global warming is primarily caused by the trapping of heat in the Earth's atmosphere due to greenhouse gases. These gases prevent heat from escaping into space, leading to a rise in global temperatures.

Topic: Chemistry, Environmental Chemistry, NEET
What is the primary factor responsible for the decrease in hydration enthalpies of alkali metal ions as you move down the group?

Options:
A Decrease in the number of water molecules surrounding the ion
B Increase in the size of the ions
C Increase in the charge density of the ions
D Increase in the solubility of the ions in water

The correct answer is:
Increase in the size of the ions

Solution:
The primary factor responsible for the decrease in hydration enthalpies of alkali metal ions as you move down the group is the increase in the size of the ions. Larger ions are less effective at attracting and binding water molecules.

Topic: Chemistry, s Block Elements, NEET
What is the primary factor responsible for the increase in atomic radius within a family or vertical column of the periodic table?

Options:
A An increase in the number of valence electrons
B A decrease in the effective nuclear charge
C A decrease in the number of energy levels
D A decrease in the atomic number

The correct answer is:
An increase in the number of valence electrons

Solution:
The increase in atomic radius within a family or vertical column of the periodic table to an increase in the number of valence electrons.

Topic: Chemistry, Classification of Elements and Periodicity in Properties, NEET
What is the primary factor responsible for the similarity in physical and chemical properties between the second and third d series?

Options:
A The intervention of the 4f orbitals.
B The decrease in metallic radius.
C The imperfect shielding of one electron by another in the same set of orbitals.
D The filling of 5d orbitals before 4f orbitals.

The correct answer is:
The intervention of the 4f orbitals.

Solution:
The similarity in physical and chemical properties between the second and third d series is primarily due to the intervention of the 4f orbitals.

Topic: Chemistry, d and f Block Elements, NEET
What is the primary factor that affects the formation of CO₂ and H2O at the alveolar site?

Options:
A partial pressure of O₂
B partial pressure of CO₂
C H⁺ concentration
D temperature

The correct answer is:
partial pressure of CO₂

Solution:
The reaction that forms CO₂ and H2O at the alveolar site proceeds in the opposite direction when the partial pressure of CO₂ is low.

Topic: Biology, Breathing and Exchange of Gases, NEET
What is the primary factor that determines the classification of reactions based on their extent in equilibrium?

Options:
A The rate of the reaction
B The color change during the reaction
C The nature of the reactants
D The concentrations of reactants and products

The correct answer is:
The concentrations of reactants and products

Solution:
Reactions are classified based on the extent to which they proceed in equilibrium, primarily determined by the concentrations of reactants and products.

Topic: Chemistry, Chemical Equilibrium, NEET
What is the primary factor that determines the extent of a chemical reaction?

Options:
A The color of the reactants
B The availability of reactants
C Physical parameters like temperature, pressure, and the use of a catalyst
D The size of the reaction vessel

The correct answer is:
Physical parameters like temperature, pressure, and the use of a catalyst

Solution:
The extent of a chemical reaction is primarily determined by physical parameters such as temperature, pressure, and the use of a catalyst.

Topic: Chemistry, Environmental Chemistry, NEET
What is the primary factor that determines the shape of a molecule, according to the VSEPR theory?

Options:
A The central atom's charge
B The number of valence shell electron pairs around the central atom
C The size of the central atom
D The electronegativity of the central atom

The correct answer is:
The number of valence shell electron pairs around the central atom

Solution:
According to the VSEPR theory, the shape of a molecule depends on the number of valence shell electron pairs (bonded or non-bonded) around the central atom.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
What is the primary factor that determines the stability of a substance under specific conditions?

Options:
A Mass
B Volume
C Temperature
D Pressure

The correct answer is:
Temperature

Solution:
The stability of a substance under specific conditions primarily depends on temperature, as mentioned in the paragraph.

Topic: Chemistry, Solid State, NEET
What is the primary factor that determines the strength of a chemical bond?

Options:
A Atomic number
B Molecular weight
C Extent of overlapping
D Bond polarity

The correct answer is:
Extent of overlapping

Solution:
The strength of a bond depends on the extent of overlapping of orbitals.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
What is the primary factor that determines the trend in metallic character across a period?

Options:
A Atomic size
B Atomic number
C Ionization enthalpy
D Electron gain enthalpy

The correct answer is:
Atomic size

Solution:
The trend in metallic character across a period to atomic size.

Topic: Chemistry, Classification of Elements and Periodicity in Properties, NEET
What is the primary factor that determines whether a group is an ortho or para directing group in electrophilic aromatic substitution?

Options:
A The group's size and steric hindrance
B The group's inductive effect
C The group's electronegativity
D The group's ability to donate or withdraw electron density

The correct answer is:
The group's ability to donate or withdraw electron density

Solution:
The group's ability to donate or withdraw electron density through resonance or inductive effects is the primary factor that determines whether it is an ortho or para directing group in electrophilic aromatic substitution.

Topic: Chemistry, Hydrocarbons, NEET
What is the primary factor that determines whether chemisorption will occur?

Options:
A Pressure of the adsorption process
B Surface area of the adsorbent
C Possibility of chemical bonding
D Nature of the adsorbate

The correct answer is:
Possibility of chemical bonding

Solution:
The paragraph mentions that chemisorption will only occur if there is some possibility of chemical bonding between adsorbent and adsorbate.

Topic: Chemistry, Surface Chemistry, NEET
What is the primary factor that determines whether two orbitals can form a bond with positive overlap?

Options:
A Their atomic mass
B Their size
C Their phase (sign) and orientation in space
D Their electron configuration

The correct answer is:
Their phase (sign) and orientation in space

Solution:
The phase (sign) and orientation in space of the orbitals are the primary factors determining whether they can form a bond with positive overlap.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET