datavorous/entrance-exam-dataset huggingface dataset:
What is the IUPAC name for a homologous series of straight chain saturated hydrocarbons?

Options:
A Alkynes
B Alkenes
C Alkanes
D Aromatics

The correct answer is:
Alkanes

Solution:
The IUPAC name for a homologous series of straight chain saturated hydrocarbons is alkane.

Topic: Chemistry, General Organic Chemistry, NEET
What is the IUPAC name for (CH3)3CBr ?

Options:
A 2-bromo-2-methylpropane
B 1-bromo-2-methylpropane
C 3-bromo-2-methylpropane
D 2-methylpropane

The correct answer is:
2-bromo-2-methylpropane

Solution:
Correct Option is : 1
2-bromo-2-methylpropane

Topic: Chemistry, Haloalkanes and Haloarenes, NEET
What is the IUPAC name given to C20H42?

Options:
A Icosane
B Dodecane
C Twenane
D None of the above

The correct answer is:
Icosane

Solution:
Correct Option is : 1
Icosane

Topic: Chemistry, General Organic Chemistry, NEET
What is the IUPAC name given to C30H62?

Options:
A Triacontane
B Tricosane
C Thirtane
D None of the above

The correct answer is:
Tricosane

Solution:
Correct Option is : 2
Tricosane

Topic: Chemistry, General Organic Chemistry, NEET
What is the IUPAC name of [Co(en)3]3+

Options:
A Bi(ethane-1,2-diammine) cobaltate(III) ion
B Tris(ethane-1,2-diamine) cobalt(III) ion
C Tris(ethane-1,2-diamine) cobalt(II) ion
D Tetrakis(ethane-1,2-diamine) cobaltate(III) ion

The correct answer is:
Tris(ethane-1,2-diamine) cobalt(III) ion

Solution:
Correct Option is : (B)
Tris(ethane-1,2-diamine) cobalt(III) ion

Topic: Chemistry, Coordination Compounds, NEET
What is the IUPAC name of [Co(NH3)4Cl(NO2)]Cl

Options:
A Hexaamminebischloridonitrito-N-cobalt(III)chloride
B Tetraamminechloridenitrite-N-cobaltate(III)chloride
C Tetraamminechloridonitrito-N-cobalt(III)chloride
D Tetraaminechloridonitrito-N-cobalt(I)chloride

The correct answer is:
Tetraamminechloridonitrito-N-cobalt(III)chloride

Solution:
Correct Option is : (C)
Tetraamminechloridonitrito-N-cobalt(III)chloride

Topic: Chemistry, Coordination Compounds, NEET
What is the IUPAC name of [Co(NH3)5Cl]Cl2?

Options:
A Hexaamminechloridocobaltate(I) chloride
B Pentaamminochloridocobalt(IV) chloride
C Pentaaminechloridecobalt(III) chlorido
D Pentaamminechloridocobalt(III) chloride

The correct answer is:
Pentaamminechloridocobalt(III) chloride

Solution:
Correct Option is : (D)
Pentaamminechloridocobalt(III) chloride

Topic: Chemistry, Coordination Compounds, NEET
What is the IUPAC name of [Co(NH3)6]Cl3

Options:
A Hexaaminecobalt(I)chlorido
B Hexaamminecobalt(III)chloride
C Septaamminecobalt(III)chloride
D Hexaamminecobaltate(II)chloride

The correct answer is:
Hexaamminecobalt(III)chloride

Solution:
Correct Option is : (B)
Hexaamminecobalt(III)chloride

Topic: Chemistry, Coordination Compounds, NEET
What is the IUPAC name of [Co(NH3)6]Cl3?

Options:
A Hexaamminecobalt(I) chloride
B Hexaamminecobalt(III) chloride
C Hexaaminecobalt(III) chlorido
D Septaamminecobaltate(III) chlorido

The correct answer is:
Hexaamminecobalt(III) chloride

Solution:
Correct Option is : (B)
Hexaamminecobalt(III) chloride

Topic: Chemistry, Coordination Compounds, NEET
What is the IUPAC name of diethyl ether?

Options:
A Ethoxyethene
B Ethoxyethane
C Ethoxyethyne
D none of above

The correct answer is:
Ethoxyethane

Solution:
Correct Option is : 2
Ethoxyethane

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
What is the IUPAC name of ethyl acetylene?

Options:
A But-1-yne
B Prop-2-ene
C Propyne
D Ethyne

The correct answer is:
But-1-yne

Solution:
Correct Option is : 1
But-1-yne

Topic: Chemistry, Hydrocarbons, NEET
What is the IUPAC name of Ethylene glycol?

Options:
A Ethanol
B Ethene-1,2-diol
C Ethane-1,2-diol
D none of above

The correct answer is:
Ethane-1,2-diol

Solution:
Correct Option is : 3
Ethane-1,2-diol

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
What is the IUPAC name of Glycerol?

Options:
A Propane-1,2,3-triol
B Propane-1,2-diol
C Propane-1-ol
D none of above

The correct answer is:
Propane-1,2,3-triol

Solution:
Correct Option is : 1
Propane-1,2,3-triol

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
What is the IUPAC name of heptyl pentyl ether?

Options:
A 1-phenoxyheptane
B 2-phenoxyheptane
C 3-phenoxyheptane
D none of above

The correct answer is:
1-phenoxyheptane

Solution:
Correct Option is : 1
1-phenoxyheptane

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
What is the IUPAC name of K2[PdCl4]?

Options:
A Potassium tetrachloridopalladate(II)
B Potassium trichloridopalladate(I)
C Potassium pentachloridopalladate(II)
D Potassium tetrachloridepalladate(III)

The correct answer is:
Potassium tetrachloridopalladate(II)

Solution:
Correct Option is : (A)
Potassium tetrachloridopalladate(II)

Topic: Chemistry, Coordination Compounds, NEET
What is the IUPAC name of K3[Fe(C2O4)3]?

Options:
A Potassium tetraoxalatoferrate(III)
B Potassium trioxalateferrate(II)
C Potassium trioxalatoferrate(III)
D Potassium pentaoxalatoferrate(III)

The correct answer is:
Potassium trioxalatoferrate(III)

Solution:
Correct Option is : (C)
Potassium trioxalatoferrate(III)

Topic: Chemistry, Coordination Compounds, NEET
What is the IUPAC name of K3[Fe(CN)6]?

Options:
A Potassium hexacyanideferrate(III)
B Potassium hexacyanidoferrate(I)
C Potassium hexacyanidoferrate(III)
D Potassium octacyanidoferrate(III)

The correct answer is:
Potassium hexacyanidoferrate(III)

Solution:
Correct Option is : (C)
Potassium hexacyanidoferrate(III)

Topic: Chemistry, Coordination Compounds, NEET
What is the IUPAC name of Methylacetylene?

Options:
A But-1-yne
B Prop-2-ene
C Propyne
D But-2-yne

The correct answer is:
Propyne

Solution:
Correct Option is : 3
Propyne

Topic: Chemistry, Hydrocarbons, NEET
What is the IUPAC name of [Mn(H2O)6]2+

Options:
A Hexaquamanganese(III) ion
B Septaquamanganese(II) ion
C Hexaquamanganese(II) ion
D Hexaquamanganese(I) ion

The correct answer is:
Hexaquamanganese(II) ion

Solution:
Correct Option is : (C)
Hexaquamanganese(II) ion

Topic: Chemistry, Coordination Compounds, NEET
What is the IUPAC name of n-butyl alcohol?

Options:
A Butan-4-ol
B Butan-1-ol
C Butan-2-ol
D Butan-3-ol

The correct answer is:
Butan-1-ol

Solution:
Correct Option is : 2
Butan-1-ol

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
What is the IUPAC name of [NiCl4]2–

Options:
A Tetrachloridonickelate(II) ion
B Trichloridonickelate(III) ion
C Tetrachloridenickel(III) ion
D Pentachloridonickelate(IV) ion

The correct answer is:
Tetrachloridonickelate(II) ion

Solution:
Correct Option is : (A)
Tetrachloridonickelate(II) ion

Topic: Chemistry, Coordination Compounds, NEET
What is the IUPAC name of [Ni(CO)4]

Options:
A Tetracarbonylnickelate(1)
B Tetracarbonatenickel(1)
C Tricarbonylnickel(0)
D Tetracarbonylnickel(0)

The correct answer is:
Tetracarbonylnickel(0)

Solution:
Correct Option is : (D)
Tetracarbonylnickel(0)

Topic: Chemistry, Coordination Compounds, NEET
What is the IUPAC name of [Ni(NH3)6]Cl2

Options:
A Hexaaminenickelate(III)chloride
B Septaamminenickel(II)chloride
C Hexaamminenickel(I)chlorido
D Hexaamminenickel(II)chloride

The correct answer is:
Hexaamminenickel(II)chloride

Solution:
Correct Option is : (D)
Hexaamminenickel(II)chloride

Topic: Chemistry, Coordination Compounds, NEET
What is the IUPAC name of o-cholorotoluene?

Options:
A 1-chlorotoluene
B 2-chlorotoluene
C 3-chlorotoluene
D none of above

The correct answer is:
2-chlorotoluene

Solution:
Correct Option is : 2
2-chlorotoluene

Topic: Chemistry, Haloalkanes and Haloarenes, NEET
What is the IUPAC name of Phenyl iso pentyl ether?

Options:
A 1- Methylbutoxybenzene
B 2- Methylbutoxybenzene
C 3- Methylbutoxybenzene
D 1- ethylbutoxybenzene

The correct answer is:
3- Methylbutoxybenzene

Solution:
Correct Option is : 3
3- Methylbutoxybenzene

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
What is the IUPAC name of [Pt(NH3)2Cl(NH2CH3)]Cl

Options:
A Diamminechlorido(methylamine)platinum(II)chloride
B Triamminechlorido(methylammine)platinum(II)chloride
C Diamminechloride(methylamine)platinum(I)chlorido
D Tetraamminechloride(methylamine)platinum(II)chloride

The correct answer is:
Diamminechlorido(methylamine)platinum(II)chloride

Solution:
Correct Option is : (A)
Diamminechlorido(methylamine)platinum(II)chloride

Topic: Chemistry, Coordination Compounds, NEET
What is the IUPAC name of [Pt(NH3)2Cl(NH2CH3)]Cl?

Options:
A Triamminechlorido(methanamine)platinum(III) chlorido
B Diamminechlorido(methanamine)platinum(II) chloride
C Tetraamminechlorido(methanamine)platinum(II) chloride
D Diaminechloride(methanamine)platinum(V) chloride

The correct answer is:
Diamminechlorido(methanamine)platinum(II) chloride

Solution:
Correct Option is : (B)
Diamminechlorido(methanamine)platinum(II) chloride

Topic: Chemistry, Coordination Compounds, NEET
What is the IUPAC name of the compound, allyl amine?

Options:
A Prop-2-en
B Propan-1-amine
C Prop-2-en-2-amine
D Prop-2-en-1-amine

The correct answer is:
Prop-2-en-1-amine

Solution:
Correct Option is : (D)
Prop-2-en-1-amine

Topic: Chemistry, Amines, NEET
What is the IUPAC name of the following compound?

Options:
A 3-Methylpent-2-ene-ol
B 4-Methylpent-2-ene-1,2-diol
C 3-Methylpent-2-ene-1,3-diol
D 3-Methylpent-2-ene-1,2-diol

The correct answer is:
3-Methylpent-2-ene-1,2-diol

Solution:
Correct Option is : (D)
3-Methylpent-2-ene-1,2-diol

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
What is the IUPAC name of the following compounds?

Options:
A Non-2-en-1-al (cockroach repellent found in cucumber)
B Non-3-en-1-al (cockroach repellent found in cucumber)
C Non-4-en-2-al (cockroach repellent found in cucumber)
D Non-4-en-3-al (cockroach repellent found in cucumber)

The correct answer is:
Non-2-en-1-al (cockroach repellent found in cucumber)

Solution:
​

Topic: Chemistry, General Organic Chemistry, NEET
What is the IUPAC name of the following compounds?

Options:
A trans-hex-3-ene
B trans-hex-4-ene
C trans-hex-5-ene
D trans-hex-6-ene

The correct answer is:
trans-hex-3-ene

Solution:

Topic: Chemistry, General Organic Chemistry, NEET
What is the IUPAC name of the major product expected from the dinitration of 3-methylphenol?

Options:
A 4−methyl−3,4−dinitrophenol
B 3−methyl−2,4−dinitrophenol
C 5−methyl−2,2−dinitrophenol
D 5−methyl−2,4−dinitrophenol

The correct answer is:
5−methyl−2,4−dinitrophenol

Solution:
Correct Option is : (D)
5−methyl−2,4−dinitrophenol

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
What is the IUPAC name of the major product expected from the mononitration of 3-methylphenol?

Options:
A 3-Methyl-4-nitrophenol and 2-Methyl-2-nitrophenol
B 3-Methyl-2-nitrophenol and 5-Methyl-2-nitrophenol
C 3-Methyl-4-nitrophenol and 5-Methyl-2-nitrophenol
D 3-Methyl-2-nitrophenol and 2-Methyl-2-nitrophenol

The correct answer is:
3-Methyl-4-nitrophenol and 5-Methyl-2-nitrophenol

Solution:
Correct Option is : (C)
3-Methyl-4-nitrophenol and 5-Methyl-2-nitrophenol

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
What is the IUPAC name of the major product expected from the mononitration of phenyl methanoate?

Options:
A Nitrophenylethanoate
B 4−Nitrophenylethanoate
C 2−Nitrophenylethanoate
D 3−Nitrophenylethanoate

The correct answer is:
4−Nitrophenylethanoate

Solution:
Correct Option is : (B)
4−Nitrophenylethanoate

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
What is the IUPAC name of [Ti(H2O)6]3+

Options:
A Hexawatertitanium(IV) ion
B Hexaquatitanium(III) ion
C Hexaquatitanium(II) ion
D Pentaaquatitanium(III) ion

The correct answer is:
Hexaquatitanium(III) ion

Solution:
Correct Option is : (B)
Hexaquatitanium(III) ion

Topic: Chemistry, Coordination Compounds, NEET
What is the IUPAC name of vinyl chloride?

Options:
A Chloro ethene
B Chloro ethane
C Chloro ethyne
D none of above

The correct answer is:
Chloro ethene

Solution:
Correct Option is : 1
Chloro ethene

Topic: Chemistry, Haloalkanes and Haloarenes, NEET
What is the joint called which is commonly immovable or slightly movable?

Options:
A Fibrous joint
B Cartilaginous joint
C Synovial joint
D None of the above

The correct answer is:
Fibrous joint

Solution:
Fibrous joints are usually immovable or slightly movable.

Topic: Biology, Locomotion and Movement, NEET
What is the junction between a motor neuron and the sarcolemma of the muscle fibre called?

Options:
A Troponin
B Motor-end plate
C Neuromuscular junction
D Both B) and C)

The correct answer is:
Both B) and C)

Solution:
The junction between a motor neuron and the sarcolemma of the muscle fibre is called the neuromuscular junction or motor-end plate.

Topic: Biology, Locomotion and Movement, NEET
What is the juvenile phase followed by in animals?

Options:
A Active reproductive behaviour
B Vegetative phase
C Senescent phase
D Morphological and physiological changes

The correct answer is:
Morphological and physiological changes

Solution:
In animals, the juvenile phase is followed by morphological and physiological changes prior to active reproductive behaviour.

Topic: Biology, Reproduction in Organisms, NEET
What is the juvenile phase in organisms?

Options:
A A period of growth and maturity before sexual reproduction
B A phase of growth before vegetative phase in plants
C A phase of growth in organisms before the reproductive phase
D A phase of growth in organisms after sexual reproduction

The correct answer is:
A period of growth and maturity before sexual reproduction

Solution:
The juvenile phase is the period of growth and maturity that all organisms have to go through before they can reproduce sexually.

Topic: Biology, Reproduction in Organisms, NEET
What is the karyotype of an individual with Klinefelter’s Syndrome?

Options:
A 45, X0
B 46, XY
C 47, XXY
D 47, XXX

The correct answer is:
47, XXY

Solution:
Klinefelter’s Syndrome is caused by the presence of an additional X chromosome, resulting in a karyotype of 47, XXY.

Topic: Biology, Principles of Inheritance and Variation, NEET
What is the key advantage of using a bomb calorimeter for heat measurements?

Options:
A It allows for the measurement of pressure changes
B It provides data on the volume change during a reaction
C It ensures constant volume conditions for accurate measurements
D It allows for easy monitoring of gaseous reactants

The correct answer is:
It ensures constant volume conditions for accurate measurements

Solution:
A bomb calorimeter ensures constant volume conditions, which are important for accurate heat measurements during chemical reactions.

Topic: Chemistry, Thermodynamics (C), NEET
What is the key advantage of using concentrated HBr (48%) for preparing alkyl bromides compared to other halogen acids?

Options:
A It is more readily available.
B It is less corrosive.
C It provides a higher yield of alkyl bromides.
D It has a lower boiling point.

The correct answer is:
It provides a higher yield of alkyl bromides.

Solution:
Concentrated HBr (48%) is preferred for preparing alkyl bromides because it provides higher yields of the desired product.

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
What is the key belief of the organic farmer?

Options:
A The use of chemicals is necessary to control pests
B The use of chemicals is harmful to the environment
C Biodiversity furthers health
D A complex system of checks and balances is not necessary in a living and vibrant ecosystem

The correct answer is:
Biodiversity furthers health

Solution:
A key belief of the organic farmer is that biodiversity furthers health.

Topic: Biology, Microbes in Human Welfare, NEET
What is the key characteristic of a maximum boiling azeotrope?

Options:
A It exhibits a positive deviation from Raoult's law.
B It exhibits a negative deviation from Raoult's law.
C It has a constantly changing composition in the liquid and vapor phases.
D It has a constant composition in the liquid and vapor phases.

The correct answer is:
It has a constant composition in the liquid and vapor phases.

Solution:
The paragraph mentions that maximum boiling azeotropes have a constant composition in both the liquid and vapor phases.

Topic: Chemistry, Solutions, NEET
What is the key characteristic of a spontaneous reaction or change?

Options:
A It occurs immediately when reactants come into contact.
B It occurs at an extremely slow rate.
C It can reverse its direction on its own.
D It is an irreversible process.

The correct answer is:
It is an irreversible process.

Solution:
A key characteristic of a spontaneous reaction or change is that it is an irreversible process, and it cannot reverse its direction on its own.

Topic: Chemistry, Thermodynamics (C), NEET
What is the key characteristic of exothermic reactions that makes them seem spontaneous?

Options:
A Increase in potential energy.
B Decrease in energy.
C Net decrease in potential energy.
D Increase in enthalpy.

The correct answer is:
Net decrease in potential energy.

Solution:
Exothermic reactions exhibit a net decrease in potential energy in the direction of the change, which is a key characteristic that makes them seem spontaneous.

Topic: Chemistry, Thermodynamics (C), NEET
What is the key characteristic of ferrimagnetic substances?

Options:
A Strong attraction to a magnetic field
B Weak attraction to a magnetic field
C Strong repulsion by a magnetic field
D Weak repulsion by a magnetic field

The correct answer is:
Weak attraction to a magnetic field

Solution:
Ferrimagnetic substances are characterized by weak attraction to a magnetic field.

Topic: Chemistry, Solid State, NEET
What is the key characteristic of "green fuel" obtained from plastic waste?

Options:
A Low octane rating
B Lead content
C High octane rating
D Unavailability in the global market

The correct answer is:
High octane rating

Solution:
"Green fuel" obtained from plastic waste is known for its high octane rating, which means it has good performance characteristics in internal combustion engines and contains no lead, making it environmentally friendly.

Topic: Chemistry, Environmental Chemistry, NEET
What is the key characteristic of hydrochloric acid that is indicated by its high dissociation constant (Ka)?

Options:
A It is a weak acid
B It is a strong acid
C It is a weak base
D It is a nonpolar compound

The correct answer is:
It is a strong acid

Solution:
A high value of dissociation constant (Ka) indicates that hydrochloric acid is a strong acid in water.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
What is the key characteristic of the surface of a solid?

Options:
A Repulsion of molecules
B Tendency to attract and retain molecules
C Uniformity of molecular distribution
D Lack of interaction with other phases

The correct answer is:
Tendency to attract and retain molecules

Solution:
The surface of a solid has the tendency to attract and retain molecules.

Topic: Chemistry, Surface Chemistry, NEET
What is the key component of anionic detergents that is involved in the cleansing action?

Options:
A Sodium salts
B Alkylbenzenesulphonates
C Hydrocarbons
D Alkali

The correct answer is:
Alkylbenzenesulphonates

Solution:
The anionic part of the molecule involved in the cleansing action in anionic detergents is sodium salts of alkylbenzenesulphonates.

Topic: Chemistry, Chemistry in Everyday Life, NEET
What is the key concept of Darwinian theory of evolution?

Options:
A Use and disuse of organs
B Adaptive ability
C Inheritance of acquired characteristics
D Branching descent and natural selection

The correct answer is:
Branching descent and natural selection

Solution:
Branching descent and natural selection are the two key concepts of Darwinian Theory of Evolution.

Topic: Biology, Evolution, NEET
What is the key concept that Lewis introduced to explain chemical bonding?

Options:
A The concept of ions
B The concept of isotopes
C The concept of the nucleus
D The concept of electron sharing

The correct answer is:
The concept of electron sharing

Solution:
Lewis introduced the concept of electron sharing as a key concept to explain chemical bonding.

Topic: Chemistry, Chemical Bonding and Molecular Structure, NEET
What is the key difference between low-density polythene (LDP) and high-density polythene (HDP)?

Options:
A LDP is chemically inert, while HDP is chemically reactive.
B LDP has a highly branched structure, while HDP consists of linear molecules.
C LDP is a good conductor of electricity, while HDP is an insulator.
D LDP is transparent, while HDP is opaque.

The correct answer is:
LDP has a highly branched structure, while HDP consists of linear molecules.

Solution:
The key difference between low-density polythene (LDP) and high-density polythene (HDP) is that LDP has a highly branched structure, while HDP consists of linear molecules.

Topic: Chemistry, Polymers, NEET
What is the key event that occurs at the onset of anaphase?

Options:
A Chromosomes are moved to spindle equator
B Centromeres split and chromatids separate
C Chromosomes are aligned along metaphase plate
D Spindle fibres attach to kinetochores of chromosomes

The correct answer is:
Centromeres split and chromatids separate

Solution:
At the onset of anaphase, each chromosome arranged at the metaphase plate is split simultaneously and the two daughter chromatids, now referred to as daughter chromosomes of the future daughter nuclei, begin their migration towards the two opposite poles.

Topic: Biology, Cell Cycle and Cell Division, NEET
What is the key factor that allows methanal, ethanal, and propanone to be miscible with water?

Options:
A Formation of ionic bonds
B Formation of metallic bonds
C Formation of covalent bonds
D Formation of hydrogen bonds

The correct answer is:
Formation of hydrogen bonds

Solution:
Methanal, ethanal, and propanone are miscible with water due to the formation of hydrogen bonds between them and water molecules.

Topic: Chemistry, Aldehydes, Ketones and Carboxylic Acids, NEET
What is the key factor that determines the product formed when preparing interhalogen compounds by the action of a halogen on lower interhalogen compounds?

Options:
A The color of the halogens
B The temperature at which the reaction is carried out
C The size and electropositivity of the halogens
D The size and electronegativity of the metal involved

The correct answer is:
The size and electropositivity of the halogens

Solution:
The size and electropositivity of the halogens involved are key factors that determine the product formed when preparing interhalogen compounds by the action of a halogen on lower interhalogen compounds.

Topic: Chemistry, p Block Elements (Group 15, 16, 17 & 18), NEET
What is the key factor that differentiates alcohols from hydrocarbons?

Options:
A The presence of oxygen
B The presence of hydrogen
C The presence of a hydroxyl group (-OH)
D The absence of carbon

The correct answer is:
The presence of a hydroxyl group (-OH)

Solution:
The presence of the hydroxyl group (-OH) is the key factor that differentiates alcohols from hydrocarbons.

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
What is the key feature of the Reimer-Tiemann reaction regarding the position of the substituent introduced onto the benzene ring?

Options:
A Para-substitution
B Ortho-substitution
C Meta-substitution
D No substitution occurs

The correct answer is:
Ortho-substitution

Solution:
The Reimer-Tiemann reaction introduces a substituent at the ortho position of the benzene ring.

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
What is the key idea behind Avogadro's proposal?

Options:
A Equal volumes of gases contain the same number of molecules.
B Gases can be combined without limits.
C Gases have varying numbers of molecules.
D The temperature and pressure affect the number of molecules in a gas.

The correct answer is:
Equal volumes of gases contain the same number of molecules.

Solution:
Avogadro's proposal is that equal volumes of gases at the same temperature and pressure contain the same number of molecules.

Topic: Chemistry, Some Basic Concepts of Chemistry, NEET
What is the key idea of Lamarck's theory of evolution?

Options:
A Use and disuse of organs
B Adaptive ability
C Inheritance of acquired characteristics
D Branching descent and natural selection

The correct answer is:
Use and disuse of organs

Solution:
Before Darwin, a French naturalist Lamarck had said that evolution of life forms had occurred but driven by use and disuse of organs.

Topic: Biology, Evolution, NEET