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The following question based on light, heat, thermodynamics, wave motion, sound, optics & oscillations topic of general science mcq
(a) It produces least chemical reaction
(b) This is comfortable for eyes
(c) Red light is scattered least
(d) It is least absorbed in air
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
Strips of two metals A and B are firmly joined together as shown in the figure. On heating, A expands more than B does. If this jointed strip is heated, then it will appear as
a) Figure a
b) Figure b
c) Figure c
d) Figure d
Answer »Answer: (a)
Question : 2
In order that the heat flows from one part of a solid to another part, what is required?
a) Density gradient
b) Uniform density
c) Temperature gradient
d) Uniform temperature
Answer »Answer: (c)
As heat flows from higher temperature to lower temperature, so a temperature gradient is required.
Question : 3
If the door of a running refrigerator in a closed room is kept open, what will be the net effect on the room?
a) It will heat the room
b) It will cool the room
c) It will make no difference on the average
d) It will make the temperature go up and down
Answer »Answer: (a)
Question : 4
Which one among the following denotes the smallest temperature?
a) 1° on the Kelvin scale
b) 1° on the Celsius scale
c) 1° on the Fahrenheit scale
d) 1° on the Reaumur scale
Answer »Answer: (a)
Question : 5
The sprinkling of water slightly reduces the temperature of a closed room because
a) water has large latent heat of vaporisation
b) temperature of water is less than that of the room
c) specific heat of water is high
d) water is a bad conductor of heat
Answer »Answer: (a)
Question : 6
Decibel is used to measure
a) Sugar in urine
b) Sound in atmosphere
c) Haemoglobin in blood
d) Particles in air
Answer »Answer: (b)
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