Question

Q 1 - ……………. is used in refrigerator.

A - Ammonia

B - Carbon dioxide

C - Ozone

D - Fluorine


Q 2 - Which among the following is the strongest metal?

A - Gold

B - Iron

C - Chromium

D - Titanium


Q 3 - Which among the following is used in discharge tube glow light?

A - Argon

B - Helium

C - Neon

D - Hydrogen

Answer 1

Answer:

• ammonia
• gold
• hydrogen