alloys, carbon & its various forms, hydrogen & compounds, sulphur, nitrogen, halogen & inert gases - Category wise Question and Answer Practice Test with Solutions

Question : 1 [PCS (Pre) 2013]

Which gas is used in the purification of drinking water?

a) Carbon Dioxide

b) Fluorine

c) Helium

d) Chlorine

Question : 2 [UPPCS (Pre) 2009]

Third allotrope of Carbon was discovered by three scientists, who were awarded the Nobel Prize for Chemistry. Find out who was not on that team.

a) Faimen

b) H.W. Kroto

c) R.F. Curl

d) R.E. Smalley

Question : 3 [UPPCS (Mains) 2003]

Percentage of Silver in German Silver is

a) None of these

b) 0%

c) 1%

d) 5%

Question : 4 [UPPCS (Mains) 2008]

In the case of rusting, the weight of iron

a) Uncertain

b) Remains the same

c) Increases

d) Decreases

Question : 5 [UP (Mains) 2015]

Heavy water has molecular weight

a) 54

b) 36

c) 18

d) 20