If two systems A and B are in thermal equilibrium with a third system C then A and B are in thermal equilibrium with each other. This is called:
- (A) First Law of Thermodynamics
- (B) Second Law of Thermodynamics
- (C) Zeroth Law of Thermodynamics
- (D) None of these
- (C) Zeroth Law of Thermodynamics
Light of the sun is _______ by the moon.
- (A) Repulsed
- (B) Absorbed
- (C) Reflected
- (D) Rejected
- (C) Reflected
Which gas is used for cooling purposes in the industries and homes?
- (A) Nitrogen
- (B) Ammonia
- (C) Chlorine
- (D) None of these
- (B) Ammonia
Water is always present in the air as:
- (A) Frost
- (B) Fog
- (C) Vapors
- (D) Clouds
- (C) Vapors
Which among the following is the highest energy phase of matter?
- (A) Gas
- (B) Solid
- (C) Plasma
- (D) Liquid
- (C) Plasma
The lowest energy phase of matter is:
- (A) Solid
- (B) Gas
- (C) Liquid
- (D) Plasma
- (A) Solid
Why water pipes are burst in extreme cold weather the water inside them in frozen?
- (A) Pipes are damaged due to extreme cold weather
- (B) Pipes are of poor quality
- (C) Water expands as it trees
- (D) None of these
- (C) Water expands as it trees
Animals fat reacts with sodium hydroxide to produce:
- (A) Drug
- (B) Fertilizer
- (C) Soap
- (D) Pesticide
- (C) Soap
Ammonia is a base because:
- (A) It can accept an electron pair
- (B) It ionizes in water to give OH − ions
- (C) It can accept proton
- (D) None of these
- (C) It can accept proton
The composition of sun is 90% Hydrogen and Helium. What is the ratio of heavy metals?
- (A) 5.3%
- (B) 6.8%
- (C) 7.8%
- (D) None of these
- (D) None of these