Chemistry MCQs

Question 1

The metal does not give H 2 on treatment with dilute HCL is

Accepted Answer

Ag

Answer

Zn

Answer

Fe

Answer

Ca

Question 2

Which of the following is not a nitrogenous fertilizer ?

Accepted Answer

Ca(CN) 2

Answer

CaCN 2

Answer

NH 4 NO 3

Answer

Urea

Question 3

Aquaregia is a mixture of the following in the ratio 1 : 3 by volume

Accepted Answer

Conc. HNO 3 and conc. HCl

Answer

Conc. HNO 3 and conc. H 2 SO 4

Answer

Dil. HCl and dil. HNO 3

Answer

Conc. HCl and conc. HNO 3

Question 4

The isomerism which exists between CH 3 CHCI 2 and CH 2 CI. CH 2 CI is

Accepted Answer

positional isomerism

Answer

chain isomerism

Answer

functional group isomerism

Answer

metamerism

Question 5

Of the following compounds of calcium, the one having highest covalent character is

Accepted Answer

Cal 3

Answer

CaF 2

Answer

CaCl 2

Answer

CaBr 2

Question 6

Which of the following pollutants is main product of automobile exhaust ?

Accepted Answer

NO

Answer

CO

Answer

CO 2

Answer

Hydrocarbons

Question 7

The molecules of which gas have highest speed?

Accepted Answer

H 2 at -73 o C

Answer

CH 4 at 300 K

Answer

N 2 at 1,027 o C

Answer

O 2 at 0 o C

Question 8

The oxidation number of nickel in K 4 [Ni(CN) 4 ] is

Accepted Answer

Zero

Answer

4

Answer

–4

Answer

8

Question 9

The buffer action of blood is due to the presence of

Accepted Answer

[HCO 3 ] – and H 2 CO 3

Answer

HCI and NaCI

Answer

CI – and [CO 3 ] 2–

Answer

CI – and [HCO 3 ] –