datavorous/entrance-exam-dataset huggingface dataset:
What chemical process is involved in the preparation of sols when FeCl3 reacts with 3H2O?

Options:
A Hydrolysis
B Oxidation
C Reduction
D Double decomposition

The correct answer is:
Hydrolysis

Solution:
The preparation of sols when FeCl3 reacts with 3H2O involves the chemical process of hydrolysis.

Topic: Chemistry, Surface Chemistry, NEET
What chemical reactions can replace the hydroxyl group of carboxylic acids with a chlorine atom?

Options:
A Oxidation reactions
B Reduction reactions
C Reactions with PCl5, PCl3, or SOCl2
D Esterification reactions

The correct answer is:
Reactions with PCl5, PCl3, or SOCl2

Solution:
The hydroxyl group of carboxylic acids can be replaced by a chlorine atom through reactions with PCl5, PCl3 or SOCl2, as mentioned in the paragraph.

Topic: Chemistry, Aldehydes, Ketones and Carboxylic Acids, NEET
What clarifies bottled fruit juices?

Options:
A Streptokinase
B Cyclosporin A
C Statins
D Pectinases and proteases

The correct answer is:
Pectinases and proteases

Solution:
Bottled fruit juices are clearer as compared to those made at home because the bottled juices are clarified by the use of pectinases and proteases.

Topic: Biology, Microbes in Human Welfare, NEET
What class does Primata and Carnivora belong to?

Options:
A Mammalia
B Aves
C Reptilia
D Fish

The correct answer is:
Mammalia

Solution:
Order Primata comprising monkey, gorilla and gibbon is placed in class Mammalia along with order Carnivora that includes animals like tiger, cat and dog.

Topic: Biology, The Living World, NEET
What class of drugs was discovered as a result of Paul Ehrlich's work on prontosil?

Options:
A Antiviral agents
B Antibiotics
C Antifungal agents
D Antiparasitic drugs

The correct answer is:
Antibiotics

Solution:
Paul Ehrlich's work on prontosil led to the discovery of antibiotics.

Topic: Chemistry, Chemistry in Everyday Life, NEET
What classification system is used to categorize alkali metals based on their density?

Options:
A Atomic number
B Electronegativity
C Valence electrons
D Density

The correct answer is:
Density

Solution:
Alkali metals are classified based on their density, with the trend of high density (Li), moderate density (Na), and low density (K, Rb, Cs) as you move down the group.

Topic: Chemistry, Hydrocarbons, NEET
What colligative property is influenced by the size of particles?

Options:
A Osmotic pressure
B Lowering in vapour pressure
C Depression in freezing point
D Elevation in boiling point

The correct answer is:
Osmotic pressure

Solution:
Osmotic pressure is influenced by the size of particles.

Topic: Chemistry, Surface Chemistry, NEET
What color change is observed when 0.002 M potassium thiocyanate solution is added to 0.2 M iron(III) nitrate solution?

Options:
A Yellow to colorless
B Colorless to yellow
C Colorless to deep red
D Yellow to deep red

The correct answer is:
Colorless to yellow

Solution:
A reddish color appears when potassium thiocyanate is added to iron(III) nitrate solution, which changes from colorless to yellow.

Topic: Chemistry, Chemical Equilibrium, NEET
What color change is observed when bromine solution in carbon tetrachloride adds to an unsaturation site in an alkene?

Options:
A Blue to red
B Red to blue
C Red to colorless
D Yellow to red

The correct answer is:
Red to colorless

Solution:
The reddish-orange color of bromine solution in carbon tetrachloride is discharged (turns colorless) when it adds to an unsaturation site.

Topic: Chemistry, Hydrocarbons, NEET
What color does Fe2+ appear when it is in the 3d6 state?

Options:
A Green
B Blue
C Pink
D Yellow

The correct answer is:
Green

Solution:
The paragraph states that Fe2+ in the 3d6 state appears green.

Topic: Chemistry, d and f Block Elements, NEET
What color does Fe3+ appear when it is in the 3d5 state?

Options:
A Yellow
B Green
C Violet
D Blue

The correct answer is:
Yellow

Solution:
Fe3+ in the 3d5 state appears yellow.

Topic: Chemistry, d and f Block Elements, NEET
What color does sodium thiocyanate give in the presence of both nitrogen and sulfur in the test?

Options:
A Black
B Violet
C Red
D Blue

The correct answer is:
Red

Solution:
Sodium thiocyanate gives a blood red color in the presence of both nitrogen and sulfur.

Topic: Chemistry, General Organic Chemistry, NEET
What color indicates the presence of sulfur when lead acetate is added to the acidified sodium fusion extract in the test for sulfur?

Options:
A Red
B Black
C Violet
D Yellow

The correct answer is:
Black

Solution:
The formation of a black precipitate of lead sulphide indicates the presence of sulfur.

Topic: Chemistry, General Organic Chemistry, NEET
What color is formed when borax is heated with CoO in a Bunsen burner flame?

Options:
A Red
B Blue
C Green
D Yellow

The correct answer is:
Blue

Solution:
When borax is heated in a Bunsen burner flame with CoO, a blue-colored Co(BO2)2 bead is formed.

Topic: Chemistry, p Block Elements (Group 13 & 14), NEET
What color is pure ozone in its gaseous form?

Options:
A Pale blue
B Dark blue
C Violet-black
D Pale yellow

The correct answer is:
Pale blue

Solution:
Pure ozone is pale blue in its gaseous form.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
What color is the precipitate formed when ammonia reacts with iron chloride (FeCl3) solution?

Options:
A White
B Brown
C Yellow
D Red

The correct answer is:
Brown

Solution:
The paragraph describes that a brown precipitate is formed when ammonia reacts with iron chloride solution.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
What commercial application does the removal of a product have in reactions involving gases or volatile substances?

Options:
A It has no commercial application.
B It boosts the reverse reaction.
C It boosts the forward reaction and increases the concentration of products.
D It results in a decrease in the concentration of reactants.

The correct answer is:
It boosts the forward reaction and increases the concentration of products.

Solution:
Removal of a product in reactions involving gases or volatile substances boosts the forward reaction and increases the concentration of products, which can have commercial applications.

Topic: Chemistry, Chemical Equilibrium, NEET
What common component of our diet is formed by the reaction between hydrochloric acid and sodium hydroxide?

Options:
A Barium sulfate
B Sodium nitrate
C Sodium chloride (common salt)
D Washing soda

The correct answer is:
Sodium chloride (common salt)

Solution:
The paragraph mentions that common salt (sodium chloride) is formed by the reaction between hydrochloric acid and sodium hydroxide.

Topic: Chemistry, Ionic Equilibrium, NEET
What compound is formed when calcium oxide reacts with phosphoric acid?

Options:
A Calcium phosphate (Ca3(PO4)2)
B Calcium phosphide (Ca3P2)
C Calcium pyrophosphate (Ca2P2O7)
D Calcium hypophosphite (Ca(H2PO2)2)

The correct answer is:
Calcium phosphate (Ca3(PO4)2)

Solution:
The reaction of calcium oxide (CaO) with phosphoric acid (H3PO4) forms calcium phosphate (Ca3(PO4)2).

Topic: Chemistry, s Block Elements, NEET
What compounds of platinum effectively inhibit the growth of tumors?

Options:
A Cis–platin and related compounds
B Rhodium complexes
C Nickel complexes
D Cobalt complexes

The correct answer is:
Cis–platin and related compounds

Solution:
Compounds of platinum, such as cis–platin and related compounds, effectively inhibit the growth of tumors.

Topic: Chemistry, Coordination Compounds, NEET
What concentration of chloroform in air for a short time can lead to dizziness, fatigue, and headache?

Options:
A 1 part per million
B 90 parts per million
C 900 parts per million
D 9000 parts per million

The correct answer is:
900 parts per million

Solution:
Breathing about 900 parts of chloroform per million parts of air for a short time can cause dizziness, fatigue, and headache.

Topic: Chemistry, Haloalkanes and Haloarenes, NEET
What concentration of fluoride ions in drinking water is considered safe to prevent tooth decay?

Options:
A 5 ppm
B 2 ppm
C 1 ppm
D 10 ppm

The correct answer is:
1 ppm

Solution:
A fluoride ion concentration of 1 ppm (1 mg dm-3) is considered safe to prevent tooth decay.

Topic: Chemistry, Environmental Chemistry, NEET
What concept from Planck did Neils Bohr use in his explanation of the hydrogen atom's structure?

Options:
A Uncertainty principle
B Wave-particle duality
C Quantisation of energy
D Special relativity

The correct answer is:
Quantisation of energy

Solution:
"He used Planck’s concept of quantisation of energy."

Topic: Chemistry, Structure of Atom, NEET
What concept has emerged as a response to the need to control the problems caused by population growth?

Options:
A Antibiotic revolution
B Family planning
C Employment programs
D Environmental conservation

The correct answer is:
Family planning

Solution:
To control the problems caused by population growth, the concept of family planning has emerged.

Topic: Chemistry, Chemistry in Everyday Life, NEET
What concept related to thermal radiations was experimentally confirmed by Heinrich Hertz?

Options:
A Atomic structure
B Quantum mechanics
C The nature of electromagnetic waves
D The nature of gravitational waves

The correct answer is:
The nature of electromagnetic waves

Solution:
Heinrich Hertz experimentally confirmed the nature of electromagnetic waves, including their emission by accelerating charged particles

Topic: Chemistry, Structure of Atom, NEET
What concept was introduced by Kekulé to address the issue of a single ortho disubstituted product for benzene?

Options:
A Resonance
B Tautomerism
C Isomerism
D Polymerization

The correct answer is:
Resonance

Solution:
Kekulé introduced the concept of resonance to address the issue of a single ortho disubstituted product for benzene.

Topic: Chemistry, Hydrocarbons, NEET
What concept was introduced by Langmuir when refining Lewis's postulations?

Options:
A The concept of electron transfer
B The concept of the octet rule
C The concept of noble gases
D The concept of metallic bonding

The correct answer is:
The concept of the octet rule

Solution:
Langmuir introduced the term covalent bond and the concept of the octet rule when refining Lewis's postulations.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
What condition can develop in the stomach due to severe acid overproduction?

Options:
A Alkalinity
B Ulcers
C Decreased pH
D Metal hydroxides

The correct answer is:
Ulcers

Solution:
In severe cases, ulcers can develop in the stomach due to overproduction of acid.

Topic: Chemistry, Chemistry in Everyday Life, NEET
What condition did Avogadro specify for his idea about equal volumes of gases containing equal numbers of molecules?

Options:
A Different temperatures
B Different pressures
C The same temperature and pressure
D The same volume

The correct answer is:
The same temperature and pressure

Solution:
Avogadro's idea applies to equal volumes of gases at the same temperature and pressure.

Topic: Chemistry, Some Basic Concepts of Chemistry, NEET
What condition increases the extent of adsorption?

Options:
A Decrease of surface area per unit mass
B Increase of surface area per unit mass
C Constant surface area per unit mass
D Decrease of temperature and pressure

The correct answer is:
Increase of surface area per unit mass

Solution:
The paragraph states that the extent of adsorption increases with the increase of surface area per unit mass of the adsorbent at a given temperature and pressure.

Topic: Chemistry, Surface Chemistry, NEET
What condition is necessary to obtain maximum work from a galvanic cell?

Options:
A High temperature
B High concentration of reactants
C Charge passed reversibly
D Low resistance in the cell

The correct answer is:
Charge passed reversibly

Solution:
To obtain maximum work from a galvanic cell, the charge has to be passed reversibly.

Topic: Chemistry, Electrochemistry, NEET
What condition is produced in the phloem as a result of loading at the source?

Options:
A Pressure flow hypothesis
B Photosynthesis
C Active transport
D Hypertonic condition

The correct answer is:
Hypertonic condition

Solution:
This process of loading at the source produces a hypertonic condition in the phloem.

Topic: Biology, Transport in Plants, NEET
What condition must be met by orbitals when they are forming a bond?

Options:
A They should have different phases
B They should have different orientations
C They should have the same sign (phase) and orientation in space
D They should have opposite charges

The correct answer is:
They should have the same sign (phase) and orientation in space

Solution:
The orbitals forming a bond should have the same sign (phase) and orientation in space.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
What condition must be met for a salt to be able to dissolve in a particular solvent?

Options:
A Solvation enthalpy must be smaller than the lattice enthalpy.
B Solvation enthalpy must be equal to the lattice enthalpy.
C Solvation enthalpy must be greater than the lattice enthalpy.
D Solvation enthalpy must be independent of the solvent.

The correct answer is:
Solvation enthalpy must be greater than the lattice enthalpy.

Solution:
For a salt to be able to dissolve in a particular solvent, its solvation enthalpy must be greater than its lattice enthalpy, so that the solvation forces can overcome the lattice forces.

Topic: Chemistry, Ionic Equilibrium, NEET
What condition must be met for a solution to freeze?

Options:
A Its vapour pressure must be higher than the vapour pressure of the pure solid solvent.
B Its vapour pressure must be lower than the vapour pressure of the pure solid solvent.
C Its vapour pressure must be equal to the vapour pressure of the pure solid solvent.
D Its vapour pressure must be higher than the atmospheric pressure.

The correct answer is:
Its vapour pressure must be equal to the vapour pressure of the pure solid solvent.

Solution:
A solution will freeze when its vapour pressure equals the vapour pressure of the pure solid solvent.

Topic: Chemistry, Solutions, NEET
What condition must be met for the existence of a heterogeneous equilibrium?

Options:
A Presence of only pure solids
B Presence of only pure liquids
C Presence of pure solids or liquids
D Presence of gases only

The correct answer is:
Presence of pure solids or liquids

Solution:
For the existence of heterogeneous equilibrium pure solids or liquids must also be present.

Topic: Chemistry, Chemical Equilibrium, NEET
What condition regarding metallic radii makes the formation of alloys more likely?

Options:
A Metallic radii within about 5 percent of each other
B Metallic radii within about 10 percent of each other
C Metallic radii within about 15 percent of each other
D Metallic radii within about 20 percent of each other

The correct answer is:
Metallic radii within about 15 percent of each other

Solution:
Alloys may be homogeneous solid solutions in which the atoms of one metal are distributed randomly among the atoms of the other. Such alloys are formed by atoms with metallic radii that are within about 15 percent of each other"

Topic: Chemistry, d and f Block Elements, NEET
What conditions are required for the polymerization of ethene to produce polythene?

Options:
A Low temperature and low pressure
B High temperature and low pressure
C High temperature, high pressure, and the presence of a catalyst
D Low temperature and the presence of a catalyst

The correct answer is:
High temperature, high pressure, and the presence of a catalyst

Solution:
The polymerization of ethene to produce polythene requires high temperature, high pressure, and the presence of a catalyst.

Topic: Chemistry, Hydrocarbons, NEET
What conditions are required to convert chlorobenzene into phenol?

Options:
A Heating in aqueous sodium chloride solution
B Heating in aqueous sodium hydroxide solution
C Heating in aqueous sulfuric acid solution
D Cooling in a nitrogen atmosphere

The correct answer is:
Heating in aqueous sodium hydroxide solution

Solution:
Chlorobenzene can be converted into phenol by heating in aqueous sodium hydroxide solution.

Topic: Chemistry, Haloalkanes and Haloarenes, NEET
What conditions for temperature and pressure cause real gases to exhibit ideal behavior?

Options:
A High temperature and low pressure
B Low temperature and low pressure
C High temperature and high pressure
D Low temperature and high pressure

The correct answer is:
High temperature and low pressure

Solution:
Real gases show ideal behavior when conditions of temperature and pressure are such that intermolecular forces are practically negligible, which occurs at high temperature and low pressure.

Topic: Chemistry, States of Matter, NEET
What conditions must be met for a real gas to behave ideally?

Options:
A Low pressure and low temperature
B High pressure and low temperature
C Low pressure and high temperature
D High pressure and high temperature

The correct answer is:
Low pressure and high temperature

Solution:
Correct Option is : (C)
Low pressure and high temperature

Topic: Chemistry, States of Matter, NEET
What conditions must be met for the equation V = nRT/p to be applicable to any gas?

Options:
A High pressure
B High temperature
C Ideal gas behavior
D Low temperature

The correct answer is:
Ideal gas behavior

Solution:
The equation V = nRT/p is applicable to any gas when the behavior of the gas approaches ideal behavior.

Topic: Chemistry, States of Matter, NEET
What confers stability to the helical structure of the Double-helix structure of DNA?

Options:
A Hydrogen bonds
B Covalent bonds
C Ionic bonds
D Hydrogen bonds and the stacking of the base pairs

The correct answer is:
Hydrogen bonds and the stacking of the base pairs

Solution:
The stability of the helical structure of the Double-helix structure of DNA is conferred by both the hydrogen bonds and the stacking of the base pairs.

Topic: Biology, Molecular Basis of Inheritance, NEET
What connects the left and right cerebral hemispheres?

Options:
A Corpus Callosum
B Thalamus
C Hypothalamus
D Deep Cleft

The correct answer is:
Corpus Callosum

Solution:
The left and right cerebral hemispheres are connected by a tract of nerve fibres called the corpus callosum.

Topic: Biology, Neural Control and Coordination, NEET
What constitutes drug abuse?

Options:
A When drugs are taken for medicinal use
B When drugs are taken in amounts/frequency that impairs one’s physical, physiological or psychological functions
C When drugs are used for religious ceremonies and rituals
D When drugs are used in folk-medicine

The correct answer is:
When drugs are taken in amounts/frequency that impairs one’s physical, physiological or psychological functions

Solution:
When drugs are taken for a purpose other than medicinal use or in amounts/frequency that impairs one’s physical, physiological or psychological functions, it constitutes drug abuse.

Topic: Biology, Human Health and Diseases, NEET
What contributes to the ability of fluorine to stabilize the highest oxidation state in transition metals?

Options:
A Lower lattice energy
B Lower bond enthalpy terms
C Higher lattice energy
D Higher covalent bond enthalpy terms

The correct answer is:
Higher lattice energy

Solution:
The paragraph mentions that the ability of fluorine to stabilize the highest oxidation state is due to higher lattice energy in the case of compounds like CoF3.

Topic: Chemistry, d and f Block Elements, NEET
What contributes to the bond length in a molecule?

Options:
A The distance between the valence electrons
B The distance between the outermost shells
C The contribution from each atom of the bonded pair
D The distance between the innermost shells

The correct answer is:
The contribution from each atom of the bonded pair

Solution:
In a molecule, each atom of the bonded pair contributes to the bond length.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
What contributes to the high tensile strength of nylon 6,6?

Options:
A Low intermolecular forces
B Weak hydrogen bonding
C Strong intermolecular forces like hydrogen bonding
D Lack of crystalline nature

The correct answer is:
Strong intermolecular forces like hydrogen bonding

Solution:
The high tensile strength of nylon 6,6 is attributed to the strong intermolecular forces, particularly hydrogen bonding, between its chains.

Topic: Chemistry, Polymers, NEET
What contributes to the positive charge of the nucleus in an atom?

Options:
A Electrons
B Neutrons
C Protons
D Alpha particles

The correct answer is:
Protons

Solution:
The positive charge of the nucleus in an atom is due to the presence of protons.

Topic: Chemistry, Structure of Atom, NEET
What contributes to the reducing nature of beryllium (Be2+)?

Options:
A Small size of Be2+ ion.
B Large atomic radius of Be.
C High ionization energy of Be.
D Low electronegativity of Be.

The correct answer is:
Small size of Be2+ ion.

Solution:
The small size of Be2+ ion contributes to its reducing nature.

Topic: Chemistry, s Block Elements, NEET
What controls the passage of food into the stomach?

Options:
A The liver
B The pancreas
C The gastro-oesophageal sphincter
D The gallbladder

The correct answer is:
The gastro-oesophageal sphincter

Solution:
The gastro-oesophageal sphincter controls the passage of food into the stomach. It is a ring-like muscle that surrounds the lower end of the oesophagus and prevents the stomach contents from flowing back into the oesophagus.

Topic: Biology, Digestion and Absorption, NEET
What controls the solubility of a substance in a solution?

Options:
A Temperature and pressure only
B Nature of the substances only
C Temperature, pressure, and nature of the substances
D Temperature and nature of the substances only

The correct answer is:
Temperature, pressure, and nature of the substances

Solution:
The paragraph mentions that the solubility of a substance in a solution depends on temperature, pressure, and the nature of the substances.

Topic: Chemistry, Solutions, NEET
What converts inactive fibrinogen into fibrins?

Options:
A Prothrombin
B Thrombin
C Thrombokinase
D Calcium ions

The correct answer is:
Thrombin

Solution:
Fibrins are formed by the conversion of inactive fibrinogens in the plasma by the enzyme thrombin.

Topic: Biology, Body Fluids and Circulation, NEET
What could be the harmful effects of improper management of industrial and domestic solid waste in a city?

Options:
A Improved sanitation and hygiene in the city.
B Reduced air pollution due to efficient waste disposal.
C Increased risk of disease transmission.
D Enhanced aesthetic appeal of the city.

The correct answer is:
Increased risk of disease transmission.

Solution:
Correct Option is : (C)
Increased risk of disease transmission.

Topic: Chemistry, Environmental Chemistry, NEET
What could be the reasons for infertility in couples?

Options:
A Physical
B Psychological
C Drugs
D All of the above

The correct answer is:
All of the above

Solution:
The reasons for infertility in couples could be many–physical, congenital, diseases, drugs, immunological or even psychological.

Topic: Biology, Reproductive Health, NEET
What could reverse the unhealthy trend of not seeking treatment for STIs?

Options:
A Increasing public awareness about the dangers of not seeking treatment
B Providing more health care facilities
C Effective counselling on the need to avoid unprotected coitus and the risk factors involved in illegal abortions
D All of the above

The correct answer is:
All of the above

Solution:
The unhealthy trend of not seeking treatment for STIs could be reversed by increasing public awareness about the dangers of not seeking treatment, providing more health care facilities, and effective counselling on the need to avoid unprotected coitus and the risk factors involved in illegal abortions.

Topic: Biology, Reproductive Health, NEET