What color does blue litmus paper turn into?
(A) White
(B) Red
(C) Black
(D) Violet
The alkali converts red litmus to-
(A) Black
(B) White
(C) Blue
(D) Violet
What is the hearing capacity of a human being?
(A) 20 Hz to 2000 Hz
(B) 20 Hz to 20000 Hz
(C) More than 20000 Hz
(D) 200 Hz to 20000 Hz
What is a mixture of two or more metals called?
(A) Amalgam
(B) Alkaline metals
(C) Fine metal
(D) Alloy
Which gas is released when water is mixed with lime?
(A) Oxygen
(B) Carbon dioxide
(C) Hydrogen
(D) Helium
On which law is the principle of working of power transformer based?
(A) Faraday's law
(B) Hooke's law
(C) Newton's law
(D) Einstein's theory
What is the value of acceleration due to gravity at the center of the earth?
(A) 0
(B) -1
(C) 1
(D) 9.8
What is the change in the weight of iron when it rusts?
(A) gets reduced.
(B) rises up
(C) remains the same
(D) None of these
When water is heated from 0°C to 4°C, its volume:
(A) first increases then decreases
(B) remains the same
(C) increases
(D) decreases
The motion of a freely falling body is an example of ________________________ motion.
(A) constant velocity
(B) constant speed
(C) uniformly accelerated
(D) non-uniformly accelerated
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