set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

Which of the following is not a part of an atom?

a) Proton

b) Neutron

c) Electron

d) Photon

Question : 2

The chemical symbol for barium is

a) Ba

b) Be

c) B

d) Bi

Question : 3

The molecular formula P₂O₅ means that

a) the ratio of the mass of P to the mass of O in the molecule is 2:5

b) there are twice as many P atoms in the molecule as there are O atoms

c) a molecule contains 2 atoms of P and 5 atoms of O

d) the ratio of the mass of P to the mass of O in the molecule is 5 : 2

Question : 4

The nucleus of a singly ionized carbon atom contains

a) 6 protons, 6 neutrons and 6 electrons

b) 5 protons and 6 neutrons

c) 6 protons and 6 neutrons

d) 12 protons, 6 neutrons and 6 electrons

Question : 5

The correct symbol for silver is

a) Si

b) Ar

c) Ag

d) Al

Question : 6

Constituents of atomic nucleus are

a) Electron and neutron

b) Proton and neutron

c) Electron and proton

d) Proton, neutron and electron