set 2 MCQ Questions & Answers Detailed Explanation

Question : 1

The cathode ray experiment was done for the first time by

a) John Dalton

b) Goldstein

c) J.J. Thomson

d) Rutherford

Question : 2

Which one of the following is heavy water used in nuclear reactor?

a) Water at 4°C but having molecular weight 19 u

b) Water having molecular weight 20 u

c) Water having molecular weight 18 u

d) Water below the ice in a frozen sea

Question : 3

Which one of the following reactions is the main cause of the energy radiation from the Sun?

a) Chemical reaction

b) Fission reaction

c) Fusion reaction

d) Diffusion reaction

Question : 4

Which of the following pairs are isotopes?

a) Ice and steam

b) Nitric oxide and nitrogen dioxide

c) Oxygen and ozone

d) Hydrogen and deuterium

Question : 5

The atomic weights are expressed in terms of atomic mass unit. Which one of the following is used as a standard?

a) ¹²C₆

b) ¹⁶O₈

c) ¹H₁

d) ³⁵Cl₁₇

Question : 6

Which would be the electrical charge on a sulphur atom containing 18 electrons ?

a) 1–

b) 0

c) 2–

d) 2+