Chemistry MCQs

Question 1

Substance used as an anti freeze in radiators of automobiles is :

Accepted Answer

Methyl alcohol and H 2 O

Answer

Methyl alcohol

Answer

Ethyl alcohol

Answer

Ethyl alcohol and H 2 O

Question 2

Poison used for killing rats is

Accepted Answer

Zinc phosphide (Zn 3 P 2 )

Answer

Calcium phosphide (Ca 3 P 2 )

Answer

Magnesium nitride (Mg 3 N 2 )

Answer

Magnesium phosphide (Mg 3 P 2 )

Question 3

Threshold limit value of copper in the atmospheric air is

Accepted Answer

1.0 mg/m 3

Answer

0.001 mg/m 3

Answer

0.01 mg/m 3

Answer

5.0 mg/m 3

Question 4

Which of the following is a secondary pollutant ?

Accepted Answer

CO

Answer

NO

Answer

SO 2

Answer

PAN

Question 5

The hydronium ion is

Accepted Answer

H 3 O +

Answer

H +

Answer

HO -

Answer

H2 +

Question 6

The unit of ionic product of water (Kw) is :

Accepted Answer

Mol 2 let -2

Answer

Mol 2 let -1

Answer

Mol -1 let -2

Answer

Mol -1 let -1

Question 7

The structure of (HPO 3 ) 3 is

Accepted Answer

Cyclic

Answer

Linear

Answer

Tetrahedral

Answer

Octahedral

Question 8

The number of d-electrons in Fe 2+ (Z = 26) is not equal to that of

Accepted Answer

p -electrons in CI(Z = 17)

Answer

p -electrons in Ne(Z = 10)

Answer

s -electrons in Mg(Z = 12)

Answer

d -electrons in Fe(Z = 26)

Question 9

The most volatile of the given liquids is

Accepted Answer

Liquid He

Answer

Ether

Answer

Liquid

Answer

Liquid NH 3