Explore topic-wise MCQs in Chemistry.

This section includes 252 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.

151.

Liquor poisoning id due to the presence of

A. Methyl alcohol
B. Ethyl alcohol
C. Carbonic acid
D. Bad compound in liquor
Answer» B. Ethyl alcohol
Discussion
152.

An enzyme which changes maltose into glucose is known as

A. Zymase
B. Maltose
C. Invertase
D. Diastase
Answer» C. Invertase
Discussion
153.

At room temperature, formaldehyde is

A. A gas
B. A liquid
C. A solid
D. Not known
Answer» B. A liquid
Discussion
154.

Fermentation of ethyl alcohol into acetic acid is done by

A. Zymase
B. Diastase
C. Maltase
D. Bacterium mycoderma aceti
Answer» E.
Discussion
155.

Epichlorohydrin is

A. 3 - chloropropane
B. 3 - chloropropan - 1 - o1
C. 2 - chloromethyloxirane
D. None of these
Answer» D. None of these
Discussion
156.

Maximum hydrogen bonding would be observed in the compound

A. Methanol
B. Glycol
C. Diethylamine
D. Diethyl ether
Answer» B. Glycol
Discussion
157.

When formic acid reacts PCI

A. Acetyl chloride
B. Formyl chloride
C. Methyl chloride
D. Propionyl chloride
Answer» C. Methyl chloride
Discussion
158.

The compound with the highest boiling point is

A. n - pentane
B. 2 - methylbutane
C. n - hexane
D. 2, 2 - dimethylpropane
Answer» D. 2, 2 - dimethylpropane
Discussion
159.

Liquid benzene (C

A. 11.2 litre
B. 22.4 litre
C. 84 litre
D. 74 litre
Answer» D. 74 litre
Discussion
160.

When water vapours are passed over aluminium carbide, we get

A. Acetaldehyde
B. Ethylene
C. Methane
D. Methyl alcohol
Answer» D. Methyl alcohol
Discussion
161.

Chiral molecules are those which are

A. Superimposable on their mirror image
B. Not superimposable on their mirror image
C. Unstable molecules
D. Capable of showing geometrical isomerism
Answer» C. Unstable molecules
Discussion
162.

Glucose has how many optical isomers ?

A. 8
B. 12
C. 16
D. Cannot be predicted
Answer» D. Cannot be predicted
Discussion
163.

What is the name of the following alkyl group ? (CH

A. Normal propyl
B. Isopropyl
C. Sec. propyl
D. Tert. propyl
Answer» C. Sec. propyl
Discussion
164.

Which of the following compounds does not contains an - OH group ?

A. Alcohol
B. Carboxylic acid
C. Aldehyde
D. Phenol
Answer» D. Phenol
Discussion
165.

Strongest bond is

A. C - C
B. C = C
C. C C
D. All are same
Answer» D. All are same
Discussion
166.

Lemon is sour due to

A. Citric acid
B. Tararic acid
C. Oxalic acid
D. Acetic acid
Answer» B. Tararic acid
Discussion
167.

The presence of unsaturation in an organic compound can be tested with

A. Schiff's reagent
B. Tollen's reagent
C. Fehling's reagent
D. Baeyer's reagent
Answer» E.
Discussion
168.

Reason for excessive solubility of ethyl alcohol in water is due to

A. Covalent bonding
B. Ionic bonding
C. Hydrogen bonding with water
D. None of the above
Answer» D. None of the above
Discussion
169.

The name of citric acid is

A. 2 - hydroxy propane - 1, 2, 3 tricarboxylic acid
B. 3 - carboxy - 3 - hydroxy pentane - 1, 5 dioic acid
C. Both (a) and (b) are correct
D. Both (a) and (b) are wrong
Answer» D. Both (a) and (b) are wrong
Discussion
170.

The name CH

A. Methyl nitrile
B. Ethane nitrile
C. Cyno ethane
D. None of these
Answer» C. Cyno ethane
Discussion
171.

The first organic compound synthesised in the laboratory from its element

A. Urea
B. Methane
C. Ethylene
D. Acetic acid
Answer» B. Methane
Discussion
172.

Adam's catalyst is

A. Platinum metal
B. Palladium
C. Nickel metal
D. PtO
E. <sub>2</sub>
Answer» E. <sub>2</sub>
Discussion
173.

Catalytic reduction of water gas gives

A. Acetylene
B. Ethylene
C. Ethane
D. Methane
Answer» E.
Discussion
174.

Paraffin dissolves in

A. Distilled water
B. Methanol
C. Benzene
D. Salt water
Answer» D. Salt water
Discussion
175.

Liquid hydrocarbon is converted into a mixture of gaseous hydrocarbon by

A. Cracking
B. Hydrolysis
C. Oxidation
D. Distillation
Answer» B. Hydrolysis
Discussion
176.

Power alcohol is

A. Absolute alcohol + Methyl alcohol
B. Absoluted alcohol + Petrol
C. Rectified alcohol + Petrol
D. Denatured alcohol + Petrol
Answer» C. Rectified alcohol + Petrol
Discussion
177.

Which of the following compounds caused tragedy of Bhopal in 1984 ?

A. Phosphene
B. Methyl isocynate
C. Carbon monoxide
D. Methyl cyanate
Answer» C. Carbon monoxide
Discussion
178.

A plastic bakelite is a compound of HCHO with

A. Benzene
B. Phenol
C. Ammonia
D. Hydrocarbon
Answer» C. Ammonia
Discussion
179.

The frouping > CO is present in

A. Ethers
B. Alcohols
C. Ketones
D. None of these
Answer» D. None of these
Discussion
180.

Match List-I (Fuel gases) with List-II (Major constituents) and select the correct answers using the codes given below the list

A. A.
B. B.
C. C.
D. D.
Answer» C. C.
Discussion
181.

A sample of chloroform before using as an anaesthetic, is tested by

A. Fehling's solution
B. Ammonical cuprous chloride
C. Ammonical silver nitrate solution
D. Silver nitrate solution after boiling with alcoholic KOH
Answer» D. Silver nitrate solution after boiling with alcoholic KOH
Discussion
182.

Number of pi electrons present in naphthalene is

A. 4
B. 6
C. 10
D. 14
Answer» D. 14
Discussion
183.

All bonds in benzene are equal due to

A. Isomerism
B. Tautomerism
C. Inductive effect
D. Resonance
Answer» E.
Discussion
184.

Petrol/gasoline is a mixture of

A. Alcohol
B. Carbohydrates
C. Hydrocarbons
D. None of these
Answer» D. None of these
Discussion
185.

The explosive nitroglycerine is

A. An ester
B. A salt
C. A soap
D. A complex compound
Answer» B. A salt
Discussion
186.

The vapour density of a volatile substance is 4 (CH

A. 2
B. 8
C. 64
D. 128
Answer» E.
Discussion
187.

Pyroligneous acid contains

A. 2% acetic acid
B. 50% acetic acid
C. 10% acetic acid
D. 20% acetic acid
Answer» D. 20% acetic acid
Discussion
188.

Most of hydrocarbons from petroleum are obtained by

A. Fractional distillation
B. Fractional crystallisation
C. Vaporisation
D. Isomerisation
Answer» B. Fractional crystallisation
Discussion
189.

Ethylene reacts with sulphur monochloride to form

A. Ethyl chloride
B. Ethylene chloride
C. Mustared gas
D. Ethylidene chloride
Answer» D. Ethylidene chloride
Discussion
190.

Acetone is mixed with bleaching powder to give

A. Chlorogorm
B. Acetaldehyde
C. Ethanol
D. Phosgene
Answer» B. Acetaldehyde
Discussion
191.

Molecule in which the distance between two adjacent carbon atoms is longest in

A. Ethane
B. Ethene
C. Ethyne
D. Benzene
Answer» B. Ethene
Discussion
192.

In benzene molecule there are 3 pi bonds and

A. 3 sigma bonds
B. 6 sigma bonds
C. 10 sigma bonds
D. 12 sigma bonds
Answer» E.
Discussion
193.

Vital force theory was put forwarded by

A. Berzelius
B. Wholer
C. Grignard
D. Kolbe
Answer» B. Wholer
Discussion
194.

The scientist who was responsible for the rejection of vital force theory

A. Berzelius
B. Wohler
C. Avogadro
D. Laboisier
Answer» C. Avogadro
Discussion
195.

In methane molecule the four hydrogen atoms are arranged as

A. Square planar
B. Square pyramid
C. Tetrahedral
D. Octahedral
Answer» D. Octahedral
Discussion
196.

The group reagent for the test of alcohols is

A. Ceric ammonium nitrate
B. Schiff's reagent
C. Molisch's reagent
D. Bromine water
Answer» B. Schiff's reagent
Discussion
197.

Bees wax is

A. Myricyl palmitate
B. Myricyl stearate
C. Myricyl oleate
D. Mixture of higher hydrocarbon
Answer» B. Myricyl stearate
Discussion
198.

The isomerism observed in alkanes is

A. Metamerism
B. Chain isomerism
C. Position isomerism
D. Geometrical isomerism
Answer» C. Position isomerism
Discussion
199.

An isomer of ethanol is

A. Methanol
B. Acetone
C. Diethyl ether
D. Dimethyl ether
Answer» E.
Discussion
200.

Tetrahedral nature of bonding in carbon atom was first shown by

A. Kekule
B. Lewis
C. Kolbe
D. van't Hoff and Le-Bel
Answer» E.
Discussion