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The following question based on light, heat, thermodynamics, wave motion, sound, optics & oscillations topic of general science mcq
The boiling point of water decreases as the altitude increases.
Reason (R) :
The atmospheric pressure increases with altitude.
(a) Both A and R are true but R is not a correct explanation of A
(b) Both A and R are true and R is the correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
The correct answers to the above question in:
Answer: (c)
Practice light, heat, thermodynamics, wave motion, sound, optics & oscillations (set 10) Online Quiz
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Read more light heat thermodynamics wave sound optics oscillation Based General Science Questions and Answers
Question : 1
What is the reason behind the extraordinary shining of the diamond cuts in a proper way?
a) Because it is so hard
b) Because it has a higher refractive index
c) Because it has a higher transparency
d) Because it has a fixed deviation floors
Answer »Answer: (b)
Question : 2
Rainbow is produced when Sunlight falls on drops of rain, which of the following physical phenomena are responsible for this?
- Dispersion
- Refraction
- Internal reflection
a) 1 and 3
b) 2 and 3
c) 1 and 2
d) All of the above
Answer »Answer: (d)
Question : 3
Consider the following statements :
- Fahrenheit is the smallest unit measuring temperature.
- Fahrenheit was the first temperature scale used for measuring temperature.
- The temperature at which Centigrade and Fahrenheit thermometers read the same is – 40°.
a) 2 and 3
b) 1 and 3
c) 1 and 2
d) 1, 2 and 3
Answer »Answer: (b)
Reamer was the first temperature scale.
Question : 4
Which one among the following statements is not correct?
a) In air or other gases, a progressive antinode occurs at a displacement node and a progressive node occurs at a displacement antinode
b) In progressive waves, the amplitude may be constant and neighbouring points are out of phase with each other
c) Transverse wave can be polarised while longitudinal wave cannot be polarised
d) Longitudinal wave can be polarised while transverse wave cnanot be polarized
Answer »Answer: (b)
Question : 5
The minimum height of mirror required to see whole stand up image of a man of height 1.50 metre shall be
a) 1.50 metre
b) 1.00 metre
c) 0.75 metre
d) 3.00 metre
Answer »Answer: (c)
Question : 6
Consider the following statements :
- 10 g of ice at 0°C and 10 g of water at 0°C contain same amount of heat.
- The specific heat of ice at 0°C is equal to that of water at 0°C.
a) 1 and 2 both
b) 2 only
c) 1 only
d) None
Answer »Answer: (a)
The specific heat depends on the pressure volume and temperature of the substance.
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