Chemistry MCQs

Question 1

The inexpensive and commonly used variety of glass is called soda glass. It is called so because

Accepted Answer

is made using soda(sodium carbonate)

Answer

was used initially for making bottles of soda(carbonated drink)

Answer

was initially used for storing sodium carbonate

Answer

is made using soda lime

Question 2

The gas used in the manufacture of vanaspati from vegetable oil is

Accepted Answer

hydrogen

Answer

oxygen

Answer

nitrogen

Answer

carbon dioxide

Question 3

The ionic radii of N3-, O2-, F- and Na+ follows the order

Accepted Answer

N3- > O2- > F- > Na+

Answer

N3- > Na+ > O2- > F-

Answer

Na+ > O2- > N3- > F-

Answer

O2- > F- > Na+ > N3-

Question 4

The graphite rods in the nuclear reactor

Accepted Answer

convert fast moving neutrons into thermal neutrons

Answer

react with U to release energy

Answer

produce neutrons

Answer

undergo combustion which triggers the nuclear fission

Question 5

The first metal used by man was

Accepted Answer

copper

Answer

iron

Answer

gold

Answer

bronze

Question 6

The hydronium ion is

Accepted Answer

H3O+

Answer

H+

Answer

HO -

Answer

H2+

Question 7

The most electropositive elements among the following is

Accepted Answer

Cs

Answer

Na

Answer

Ca

Answer

K

Question 8

The method that cannot be used for removing permanent hardness of water is

Accepted Answer

boiling

Answer

adding sodium carbonate

Answer

distillation

Answer

adding caustic soda

Question 9

The following are the half lives of four active isotopes. Which one of the following is the most dangerous to handle?

Accepted Answer

0.01 minute

Answer

3 billion years

Answer

100 years

Answer

13 days