Chemistry MCQs

Question 1

The molecular formula of phosphorous is

Accepted Answer

P 4

Answer

P 1

Answer

P 2

Answer

P 3

Question 2

Acid rain is caused by

Accepted Answer

SO 2 and NO 2

Answer

SO 2 and particulates

Answer

NO 2 and particulates

Answer

CO 2 and CFCs

Question 3

Which of the following is used in dating archaeological findings ?

Accepted Answer

6 14 C

Answer

92 235 U

Answer

1 3 H

Answer

8 18 O

Question 4

Number of 6.023 × 10 23 atoms present in one mole of a gas at STP is

Accepted Answer

6.023 × 10 23

Answer

6.023 × 10 20

Answer

6.023 × 10 –20

Answer

6.023 × 10 –23

Question 5

Colloids can be purified by

Accepted Answer

Dialysis

Answer

Condensation

Answer

Condensation

Answer

Condensation

Question 6

Chemical formula of washing soda is

Accepted Answer

Na 2 CO 3 .10H 2 O

Answer

Na 2 SO 4 .10H 2 O

Answer

NaHCO 3

Answer

Ca(OH) 2

Question 7

Besides CO 2 , the other green house gas is

Accepted Answer

CH 4

Answer

N 2

Answer

Ar

Answer

O 2

Question 8

Which of the following molecules has a bond order of 2.5?

Accepted Answer

NO

Answer

HCL

Answer

CO

Answer

F 2

Question 9

Which one of the following has a maximum tendency to form M 3 ion ?

Accepted Answer

N

Answer

Bi

Answer

P

Answer

As