atomic structure molecules and nuclear chemistry - Category wise Question and Answer Practice Test with Solutions

Question : 26 [NDA]

The number of neutrons in ₇Al²⁷ is

a) 14

b) 27

c) 40

d) 13

Question : 27 [CDS]

Which of the following isotopes of carbon is/are used in carbon dating?

a) ₆ C¹⁴ only

b) ₆ C¹³ only

c) ₆ C¹² only

d) ₆ C¹² and ₆ C¹⁴

Question : 28

Valency of Cr in CrP$O_4$ is

a) 2

b) 3

c) 4

d) 1

Question : 29

What mass of hydrogen and oxygen will be produced on complete electrolysis of 18g of water?

a) 4g hydrogen and 32g oxygen

b) 2g hydrogen and 16g oxygen

c) 2g hydrogen and 32g oxygen

d) 4g hydrogen and 14g oxygen

Question : 30

The number value 6.022 × 10²³ is also called

a) Atomic Number

b) Avagadro’s number

c) Dalton Number

d) Mass Number