Explore topic-wise MCQs in Chemistry.

This section includes 64 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.

1.

Cinnabar

A. Hg
B. Cu
C. Pb
D. Zn
Answer» B. Cu
Discussion
2.

Which one of the among the following is used as a

A. Ozone
B. Heavy hydrogen
C. Heavy water
D. Hydrogen peroxide
Answer» D. Hydrogen peroxide
Discussion
3.

The number of protons in a

A. more than the atomic number of the element
B. less than the atomic number of the element
C. more than the number of elecrons in the atom
D. less than the number of electrons in the atom
Answer» E.
Discussion
4.

In which one of the following is the

A. Carbon
B. Oxygen
C. Nitrogen
D. Argon
Answer» D. Argon
Discussion
5.

Species

A. isotopes
B. isobars
C. isoelectronic
D. isotones
Answer» D. isotones
Discussion
6.

Which of the following electromagnetic wave has the

A. Infra red rays
B. Gamma rays
C. Light rays
D. Ultra-violet rays
Answer» B. Gamma rays
Discussion
7.

Gamma rays

A. high energy electrons
B. low energy electrons
C. high energy electromagnetic
D. high energy positrons waves
Answer» D. high energy positrons waves
Discussion
8.

An atom has

A. 25
B. 27
C. 35
D. 43
Answer» D. 43
Discussion
9.

Cathode rays

A. <sup>+<sup>ve electrode </sup></sup>
B. <sup>-<sup>ve electrode </sup></sup>
C. (a) & (b) alternatively
D. None of the above
Answer» B. <sup>-<sup>ve electrode </sup></sup>
Discussion
10.

Neutron

A. J.J. Thomson
B. Chadwick
C. Rutherford
D. Priestley
Answer» C. Rutherford
Discussion
11.

Structure of solids

A. cosmic rays
B. Z - rays
C. infrared
D. y - rays
Answer» C. infrared
Discussion
12.

Which of the following has

A. Cosmic rays
B. X - rays
C. Radio waves
D. Micro waves
Answer» B. X - rays
Discussion
13.

The nucleus of a

A. 6 protons and 6 neutrons
B. 5 protons and 6 neutrons
C. 6 protons and 6 neutrons and 6 electrons
D. 12 protons and 6 neutrons and 6 electrons
Answer» B. 5 protons and 6 neutrons
Discussion
14.

Which one among the following is the equivalent

A. 98
B. 60
C. 100
D. 49
Answer» E.
Discussion
15.

Positive ions

A. neutrons
B. protons
C. nuclear charge
D. electrons
Answer» E.
Discussion
16.

Nuclear particles

A. electrons
B. neutrons
C. positrons
D. mesons
Answer» E.
Discussion
17.

Discovery of the

A. Bohr
B. Rutherford
C. Moseley
D. Thomson
Answer» C. Moseley
Discussion
18.

Protons and neutrons

A. short range 'weak interaction'
B. short range 'strong interaction'
C. long range 'electromagnetic interaction'
D. long range 'gravitational interaction'
Answer» C. long range 'electromagnetic interaction'
Discussion
19.

Meson

A. Powell
B. Seaburg
C. Anderson
D. Yukawa
Answer» E.
Discussion
20.

Species containing same number of

A. Isotopes
B. Isobars
C. Isoelectronic
D. Isotones
Answer» D. Isotones
Discussion
21.

Which one is not the

A. Protium
B. Eritium
C. Deuterium
D. Tritium
Answer» C. Deuterium
Discussion
22.

Radioactive isotope

A. Protium
B. Deuterium
C. Tritium
D. All
Answer» D. All
Discussion
23.

Regarding the atom of a chemical element,

A. orientation
B. shape
C. size
D. spin
Answer» B. shape
Discussion
24.

Wavelength

A. green and yellow
B. red and blue
C. green and red
D. blue and yellow
Answer» C. green and red
Discussion
25.

Nucleons

A. protons and neutrons
B. neutrons and electrons
C. protons and electrons
D. protons, neutrons and electrons
Answer» B. neutrons and electrons
Discussion
26.

Rutherford's scattering

A. nucleus
B. atom
C. electron
D. neutron
Answer» B. atom
Discussion
27.

Isotopes

A. same number of neutrons
B. same number of protons
C. same atomic mass
D. different chemical properties
Answer» C. same atomic mass
Discussion
28.

In an atom the order of filling up of the

A. Aufbau principle
B. Heisenberg's uncertainly principle
C. Hund's rule
D. Pauli's exclusion principle
Answer» B. Heisenberg's uncertainly principle
Discussion
29.

Bohr model

A. Spectrum of Hydrogen atoms
B. Spectrum of one atom/ion having one electron only
C. Spectrum of Hydrogen molecule
D. None of these
Answer» C. Spectrum of Hydrogen molecule
Discussion
30.

The atoms of the elements having

A. isotopes
B. isobars
C. isotones
D. isomers
Answer» C. isotones
Discussion
31.

Any

A. 4-electrons
B. 6-electrons
C. 2-electrons in opposite
D. None of these
Answer» C. 2-electrons in opposite
Discussion
32.

Cathode

A. electromagnetic wave
B. stream of - particle
C. stream of electrons
D. radiations
Answer» D. radiations
Discussion
33.

The number of unpaired electrons in

A. 2
B. 4
C. 1
D. 3
Answer» B. 4
Discussion
34.

The fundamental particles present in

A. protons and electrons
B. neutrons and electrons
C. protons and neutrons
D. protons and positrons
Answer» B. neutrons and electrons
Discussion
35.

Cathode rays are deflected towards

A. +ve electrode
B. -ve electrode
C. (a) & (b) alternatively
D. None of the above
Answer» B. -ve electrode
Discussion
36.

Meson was discovered by

A. Powell
B. Seaburg
C. Anderson
D. Yukawa
Answer» E.
Discussion
37.

The nitrogen atom has 7 protons and 7 electrons. The nitride ion will have

A. 10 protons and 7 electrons
B. 7 protons and 10 electrons
C. 4 protons and 7 electrons
D. 4 protons and 10 eletrons
Answer» C. 4 protons and 7 electrons
Discussion
38.

Which is one of the correct sequences of

A. UV > Green > In > Hard X - rays
B. IR > Green > UV > Hard X - rays
C. UV > Hard X - rays > In > Green
D. IR > Hard X - rays > Green > UV
Answer» C. UV > Hard X - rays > In > Green
Discussion
39.

Cathode rays can be deflected by

A. magnetic filed only
B. electric field only
C. both (a) & (b)
D. none of these
Answer» D. none of these
Discussion
40.

Structure of solids investigated by using

A. cosmic rays
B. X - rays
C. infrared
D. y - rays
Answer» C. infrared
Discussion
41.

In a given atom, no two

A. Hund's rule
B. Pauli's exclusion principle
C. Uncertainty principle
D. Aufbau's principle
Answer» C. Uncertainty principle
Discussion
42.

Electromagnetic radiation

A. ultraviolet
B. radio waves
C. X - rays
D. infrared
Answer» C. X - rays
Discussion
43.

Discovery of the nucleus

A. Bohr
B. Rutherford
C. Moseley
D. Thomson
Answer» C. Moseley
Discussion
44.

Consider the following pairs of ions or atoms

A. 1, 2 and 3
B. 1 and 2
C. 2 and 3
D. 1 and 3
Answer» E.
Discussion
45.

CN- ion

A. N
B. <sub>2</sub>
C. CO
D. both a & b
E. none
Answer» D. both a & b
Discussion
46.

The atoms of the elements which have same

A. Isobars
B. Isotopes
C. Isotones
D. None
Answer» D. None
Discussion
47.

Wavelength of

A. 1 mm
B. 1 cm
C. 1 micron
D. 1 angstrom
Answer» E.
Discussion
48.

The absolute value of charge on

A. J.J. Thomson
B. R.A. Millikan
C. Rutherford
D. Chadwick
Answer» C. Rutherford
Discussion
49.

Which of the following has the

A. ultraviolet radiation
B. y - radiation
C. visible radiation
D. infra red radiation
Answer» E.
Discussion
50.

Neutrino

A. charge +1, amss 1
B. charge 0, mass 0
C. charge -1, mass 1
D. charge 0, mass 1
Answer» C. charge -1, mass 1
Discussion