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Question and Answer: Physics (part-4)

Saturday, 6 February 2016

Physics (part-4)

debasisanswer.blogspot.com

debasisanswer.blogspot.com


Q: The phenomenon of Brownian movement may be taken as evidence of

O: (a) kinetic theory of matter

(b) EMT of radiation

(c) corpuscular theory of light

(d) photoelectric phenomenon

Ans. (a) kinetic theory of matter



Q: One liter of ideal gas at 27? is heated at a constant pressure to 297?. Then, the final volume is approximately

O: (a) 1.2 L

(b) 1.2 L

(c) 19 L

(d) 2.4 L

Ans. (b) 1.2 L



Q: Temperature remaining constant, the pressure of gas is decreased by 20%. The percentage change in volume

O: (a) increases by 20%

(b) decreases by 20%

(c) increases by 25%

(d) decreases by 25%

Ans. (c) increases by 25%



Q: At what temperature will be the oxygen molecules have the same root mean square speed as hydrogen molecules at 300 K ?

O: (a) 1600 K

(b) 4800 K

(c) 3200 K

(d) 2400 K

Ans. (b) 4800 K



Q: 10 mol of an ideal monoatomic gas at 10? is mixed with 20 mol of another monoatomic gas at 20 degree. Then, the temperature of the mixture is

O: (a) 16.6 degree

(b) 15 degree

(c) 16 degree

(d) 15.5 degree

Ans. (a) 16.6 degree


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