set 2 MCQ Questions & Answers Detailed Explanation

Question : 1

Which of the following has a charge of +1 and a mass of 1 amu ?

a) A proton

b) An electron

c) A neutron

d) A helium nucleus

Question : 2

Match List-I with List-II and select the correct answer using the code given below the lists.

a) 1 4 3 2

b) 2 4 3 1

c) 2 3 4 1

d) 1 3 4 2

Question : 3

The number of protons in a negatively charged atom (anion) is

a) more than the number of elecrons in the atom

b) less than the atomic number of the element

c) more than the atomic number of the element

d) less than the number of electrons in the atom

Question : 4

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 : 5

The cathode ray experiment was done for the first time by

a) John Dalton

b) Goldstein

c) J.J. Thomson

d) Rutherford

Question : 6

Which of the following pairs is/are correctly matched?

1. Isotopes : Atoms with same atomic number but different atomic mass
2. Isobars : Atoms with same number of neutrons but different atomic number
3. Isotones : Atoms with same mass number but different atomic number

a) 1 and 2 only

b) 1 only

c) 1, 2 and 3

d) 2 only