atomic structure molecules and nuclear chemistry - Category wise Question and Answer Practice Test with Solutions

Question : 6

While performing cathode ray experiments, it was observed that there was no passage of electric current under normal conditions. Which of the following can account for this observation ?

a) Carbon dioxide is present in air

b) Air is a poor conductor of electricity under normal conditions

c) Dust particles are present in air

d) None of these

Question : 7

Which one of the following laws explains the formation of carbon monoxide and carbon dioxide from carbon and oxygen?

a) Law of multiple proportions

b) Law of reciprocal proportions

c) Law of conservation of mass

d) Law of difinite proportions

Question : 8 [RAS/RTS (Pre) 1992]

Which of the following statement about molecular structure is correct?

a) Electron and proton are inside the nucleus and neutron revolve around the nucleus

b) Proton and neutron are inside the nucleus and electrons revolve around the nucleus

c) Neutron and electron are found inside the nucleus and protons revolves around the nucleus

d) Proton, neutron and electron all are inside the nucleus

Question : 9 [NDA]

Protons and neutrons are bound in a nucleus by the

a) long range ‘electromagnetic interaction’

b) short range ‘strong interaction’

c) short range ‘weak interaction’

d) long range ‘gravitational interaction’

Question : 10

One gram of which of the following contains largest number of oxygen atoms?

a) O₂

b) O₃

c) O

d) All contains same