set 1 MCQ Questions & Answers Detailed Explanation
MOST IMPORTANT general science mcq - 16 EXERCISES
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The following question based on light, heat, thermodynamics, wave motion, sound, optics & oscillations topic of general science mcq
(a) can be charged as well as uncharged
(b) are uncharged particles
(c) are charged particles
(d) None of the above
The correct answers to the above question in:
Answer: (c)
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Read more light heat thermodynamics wave sound optics oscillation Based General Science Questions and Answers
Question : 1
When vapour condenses into liquid
a) its temperature rises
b) it absorbs heat
c) it liberates heat
d) its temperature decreases
Answer »Answer: (c)
Question : 2
The turntable of a gramophone is rotated at a constant speed of x revolutions/minute. Which one of the following values of the revolutions per minute is not used ?
a) 56 r.p.m.
b) 78 r.p.m.
c) 45 r.p.m.
d) 33 r.p.m.
Answer »Answer: (a)
Question : 3
The heat required in calories to convert one gram of ice at 0°C to steam at 100°C is approximately
a) 336
b) 720
c) 80
d) 620
Answer »Answer: (b)
Question : 4
A radar which detects the presence of an enemy aircraft uses
a) Sound waves
b) Radio waves
c) Light waves
d) Ultrasound waves
Answer »Answer: (b)
Question : 5
The surface of a lake is frozen in severe winter, but the water at its bottom is still liquid. What is the reason ?
a) Since the surface of the lake is at the same temperature as the air, no heat is lost.
b) Ice is a bad conductor of heat.
c) The density of water is maximum at 4°C.
d) None of the statements (a), (b) and (c) given is correct.
Answer »Answer: (b)
Question : 6
When pressure on piece of ice is increases its melting point
a) increases
b) decreases
c) remains unchanged
d) first increases and then decreases
Answer »Answer: (a)
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