Question

10. If a gas expanded at constant temperature, it indicates that
(a) Kinetic energy of molecules decreases
(b) Pressure of the gas increase
(c) Kinetic energy of the molecules remains the same
(d) Number of molecules of gas increases
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Answer 1

Answer:

C) Kinetic energy of the molecules remains same

Answer 2

Answer:

C is correct

Explanation:

see, average KE is directly proportional to the absolute Temperature (T in K) and here T is constant so, option A is not correct but C is correct.

PV=nRT =K

P=K/V

if V increases then P decreases

No. of molecules will be same.