Chemistry MCQs

Question 1

The elements with atomic numbers 9, 17, 35, 53, 85 are all

Accepted Answer

Halogens

Answer

Heavy metals

Answer

Noble gases

Answer

Light metals

Question 2

Which one is the most reactive halogen?

Accepted Answer

Fluorine

Answer

Iodine

Answer

Bromine

Answer

Chlorine

Question 3

Who first published the periodic table?

Accepted Answer

Dmitri Mendeleev

Answer

John Dalton

Answer

Julius Lothar Meyer

Answer

Henry Moseley

Question 4

The most suitable vessel for storing concentrated sulphuric acid is

Accepted Answer

Glass vessel

Answer

Copper vessel

Answer

Aluminium vessel

Answer

Earthen vessel

Question 5

Which one of the following nonmetals shows allotropy in the liquid state?

Accepted Answer

Sulphur

Answer

Carbon

Answer

Phosphorous

Answer

Bromine

Question 6

Sulphuric acid is

Accepted Answer

Dibasic

Answer

Monobasic

Answer

Tribasic

Answer

Tetrabasic

Question 7

When conc. H2SO4 is added to dry KNO3, brown fumes are evolved. These fumes are due to

Accepted Answer

NO2

Answer

SO3

Answer

SO2

Answer

N2O

Question 8

Wax used for making candle is chemically a mixture of

Accepted Answer

Aliphatic hydrocarbons

Answer

Aromatic hydrocarbons

Answer

Cyclic hydrocarbons

Answer

Aliphatic and aromatic hydrocarbons

Question 9

Adding Cl2 to benzene in the presence of AlCl3 is an example of :

Accepted Answer

Substitution reaction

Answer

Elimination reaction

Answer

None of the options

Answer

Addition reaction