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.

1.

The end product of alcoholic fermentation is

A. pyruvic acid
B. acetaldehyde
C. ethyl alcohol
D. formic acid
Answer» D. formic acid
2.

The enzymes are killed

A. at a very high temperature
B. during chemical reaction
C. at low temperature
D. under atmospheric pressure
Answer» B. during chemical reaction
3.

Which has maximum calorific value?

A. Fat
B. Protein
C. Carbohydrate
D. Amino acid
Answer» B. Protein
4.

In which type of coal percentage of carbon is the highest?

A. Peat
B. Lignite
C. Bituminous
D. Anthracite
Answer» E.
5.

The gas is commonly used in anaesthesia

A. methane
B. nitrous oxide
C. nitrogen
D. hydrogen peroxide
Answer» C. nitrogen
6.

Which of the following could act as a propellant for rockets?

A. Liquid oxygen + Liquid argon
B. Liquid hydrogen + Liquid oxygen
C. Liquid nitrogen + Liquid oxygen
D. Liquid hydrogen + Liquid nitrogen
Answer» C. Liquid nitrogen + Liquid oxygen
7.

Candles contains a mixture of

A. Bees wax and paraffin wax
B. Bees wax and stearic acid
C. Paraffin wax and stearic acid
D. Higher fatty acid
Answer» D. Higher fatty acid
8.

C11 - L - methyl-methionine is used for

A. brain tumor and parathyroid imaging
B. stomach analysis
C. bone imaging
D. live imaging
Answer» B. stomach analysis
9.

Petroleum gas is a mixture of ethane, propane and butane. What is its major constituents?

A. Eathane
B. Propane
C. Butane
D. All three are present in equal propertions
Answer» D. All three are present in equal propertions
10.

Oils are purified by

A. Fractional distillation
B. Steam distillation
C. Crystallisation
D. Vacuum distillation
Answer» C. Crystallisation
11.

Kerosene is a mixture of

A. aromatic hydrocarbons
B. aliphatic hydrocarbons
C. saturated hydrocarbons
D. alicyclic hydrocarbons
Answer» C. saturated hydrocarbons
12.

Consider the following statements
1. Liquified Natural Gas (LNG) in liquified under extremely cold temperatures and high pressure to facilitate storage of transporation in specially designed vessels.
2. First LNG terminal in India was built in Hassan.
3. Natural Gas Liquids (NGL) are separated from LPG and these include ethane, propane, butane and natural gasoline.
Which of the statement given above is/are correct ?

A. 1 only
B. 1 and 3
C. 2 and 3
D. 1,2, and 3
Answer» C. 2 and 3
13.

A mixture of CS2 and H2S on passing over heated copper gives

A. Methane
B. Ethane
C. Complex mixture
D. Propane
Answer» B. Ethane
14.

Which one of the following molecule is planar ?

A. NF
B. NCI
C. PH
D. BF
Answer» E.
15.

Which among the following is the strongest acid ?

A. HOCI
B. HCIO
C. HCIO
D. None of these
Answer» E.
16.

The fraction obtained between temperature 50-300 C during fractional distillation of crude petroleum is

A. Paraffin wax
B. Heavy oil
C. Kerosene
D. Naphtha
Answer» D. Naphtha
17.

When formic acid reacts PCI5, it forms

A. Acetyl chloride
B. Formyl chloride
C. Methyl chloride
D. Propionyl chloride
Answer» C. Methyl chloride
18.

In the complete combustion of CnH2n+2, the number of oxygen moles required is

A. n / 2O
B. (n + 1 / 2)O
C. (3n + 1 / 2)O
D. (n + 2 / 2)O
Answer» D. (n + 2 / 2)O
19.

Lindlar's catalyst is

A. Pt is ethanol
B. Pd + BaSO
C. Ni in ethnol
D. Na is liquid NH
Answer» C. Ni in ethnol
20.

The hybridization present in C2H2 is

A. sp
B. sp
C. sp
D. dsp
Answer» B. sp
21.

Consider the following statements
1. It is used in welding industry
2. It is raw material for preparing plastics
3. It is easily, obtained by mixing silicon carbide and water
Of these statements

A. 1 and 2 are correct
B. 1 and 3 are correct
C. 2 and 3 are correct
D. 1, 2 and 3 are correct
Answer» B. 1 and 3 are correct
22.

Match List-I with List-II and pick the correct matching form the codes given below
List-I (Haloalkane/arene)List-II (Application)
A.Iodofron1.CF4
B.BHC2.Antiseptic
C.Freon - 143.Moth repellent
D.Halothanes4.Inhalative anaesthetic
E.p-Dichlorobenzene5.Termite pesticide
Code :

A. A-2, B-4, C-5, D-3, E-1
B. A-2, B-5, C-1, D-4, E-3
C. A-3, B-4, C-2, D-1, E-5
D. A-1, B-3, C-5, D-2, E-4
Answer» C. A-3, B-4, C-2, D-1, E-5
23.

The name CH3 - C N is

A. Methyl nitrile
B. Ethane nitrile
C. Cyno ethane
D. None of these
Answer» C. Cyno ethane
24.

The hybridization of carbon is benzene is

A. sp
B. sp
C. sp
D. dsp
Answer» D. dsp
25.

Rectified spirit can be dried with

A. Conc. H
B. SO
C. CaO
D. Anhydrous CaCI
E. Slaked lime
Answer» C. CaO
26.

Match List-I (Fuel gases) with List-II (Major constituents) and select the correct answers using the codes given below the list
List-IList-II
F.CNG1.Carbon monoxide, hydrogen
G.Coal gas2.Butane, Propane
H.LPG3.Butane, Ethane
J.Water gas4.Hydrogen, Methane, CO
Codes :
FGHJ
A.2134
B.3421
C.2431
D.3124

A. A.
B. B.
C. C.
D. D.
Answer» C. C.
27.

Assertion (A) : The main constituent of the liquified petroleum gas in methane
Reason (R) : Methane can be used directly for burning in homes and factories where it can be supplied through pipelines
Codes

A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true but R is not the correct explanation of A
C. A is true but R is false
D. A is false but R is true
Answer» E.
28.

IUPAC name of CH2 = CH - CN is

A. Ethenenitrile
B. Vinyl cyanide
C. Cyano ethene
D. Prop - 2 enenitrile
Answer» E.
29.

The compound, which is used in refrigeration is

A. CH
B. CCI
C. CCI
D. F
E. COCI
Answer» D. F
30.

The antiseptic action of CHI3 is due to

A. Iodofrom itself
B. Liberation of free iodine
C. Partially due to iodine and partially due to CHI
D. itself
E. None of the above
Answer» C. Partially due to iodine and partially due to CHI
31.

The vapour density of a volatile substance is 4 (CH4 =1). Its molecular mass would be

A. 2
B. 8
C. 64
D. 128
Answer» E.
32.

A hybrid orbital has 25% s-character and 75% p - character. To which type of hybridization it belongs

A. sp
B. sp
C. sp
D. s
E. p
Answer» B. sp
33.

Assertion (A) : Large cold storage plants use ammonia as refrigerant. While domestic refrigerators use chlorofluorocarbons.
Reason (R) : Ammonia can be liquified at ambient temperature and low pressure
Codes

A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true but T is not the correct explanation of A
C. A is true but R is false
D. A is false but R is true
Answer» B. Both A and R are true but T is not the correct explanation of A
34.

Which one of the following can be purified by sublimation ?

A. F
B. CI
C. Br
D. I
Answer» E.
35.

Liquid benzene (C6H6) burns in oxygen according to, 2C6H6 (l) + 15O2 (g) 12CO (g) + 6H O (g) How many litre of O at STP are needed to complete the combustion of 39 g of liquid benzene ?

A. 11.2 litre
B. 22.4 litre
C. 84 litre
D. 74 litre
Answer» D. 74 litre
36.

Assertion (A) : Phenyl is used as a household germicide.
Reason (R) : Phenyl is phenol derivative and phenol is an effective germicide
Codes

A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true but R is not the correct explanation of A
C. A is true but R is false
D. A is false but R is true
Answer» B. Both A and R are true but R is not the correct explanation of A
37.

What is the name of the following alkyl group ? (CH3)2 CH

A. Normal propyl
B. Isopropyl
C. Sec. propyl
D. Tert. propyl
Answer» C. Sec. propyl
38.

Match List - I (Industrial process) with List - II (Industry with which associated) and select the correct answer using the code given below the lists
List-IList-II
F.Cracking1.Rubber
G.Smelting2.Petroleum
H.Hydrogenation3.Copper
J.Vulcanization4.Edible fats
Code
FGHJ
A.3214
B.2341
C.2314
D.3241

A. A.
B. B.
C. C.
D. D.
Answer» C. C.
39.

Glucose and fructose are converted into C2H5OH in presence of

A. Invertase
B. Diastase
C. Zymase
D. Lipids
Answer» D. Lipids
40.

IUPAC name of CH3CHO is

A. Acetaldehyde
B. Ethanal
C. Methyl aldehyde
D. Formalin
Answer» C. Methyl aldehyde
41.

General formula CnH2n-2 represents

A. Alkenes
B. Alkanes
C. Alkynes
D. None
Answer» D. None
42.

Which is the correct formula of bleaching powder ?

A. Ca(OCI)CI
B. CaO(OCI)
C. Ca(OCI)
D. Ca(OCI)
E. CI
Answer» B. CaO(OCI)
43.

The compound CH3COOC2H5 belongs to the class

A. Alkanals
B. Alkanones
C. Alkyle alkanoates
D. Alkanediols
Answer» D. Alkanediols
44.

Nitrogen containing organic compound when fused with sodium metal forms

A. NaNO
B. NaCN
C. NaNH
D. NaNC
Answer» C. NaNH
45.

Successive alkens differ by

A. CH
B. CH
C. CH
D. C
E. H
Answer» B. CH
46.

Petroleum is found

A. On the surface of the earth
B. In the atmosphere
C. In arctic ocean
D. Deep under the surface of the earth
Answer» E.
47.

Benzene is a polymer of

A. Methane
B. Acetylene
C. Ethane
D. Ethylene
Answer» C. Ethane
48.

Naphthalene is a volatile solid it is best purified by

A. Crystallisation
B. Distillation
C. Steam distillation
D. Sublimation
Answer» E.
49.

A mixture of CS

A. Methane
B. Ethane
C. Complex mixture
D. Propane
Answer» B. Ethane
50.

The couple between base units of DNA is through

A. Hydrogen bonding
B. Electrostatic bonding
C. Covalent bonding
D. van der Waal's forces
Answer» B. Electrostatic bonding