NEET Physics: Questions 1526 - 1529 of 2098

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Question number: 1526

» Atoms and Nuclei » Radioactive Decay Law

MCQ▾

Question

The half-life of radioactive Radon is 3.8 days. The time at the end of which 120th of the Radon sample will remain undecayedis

(Given log 10 e = 0.4343)

Choices

Choice (4) Response

a.

33 days

b.

3.8 days

c.

76 days

d.

16.5 days

Question number: 1527

» Kinetic Theory of Gases » Kinetic Energy and Temperature

MCQ▾

Question

In the two vessels of same volume, atomic hydrogen and helium at pressure 1 atm and 2 atm are filled. If temperature of both the samples is same, then average speed of hydrogen atoms < C H > will be related to that of helium < C He > as,

Choices

Choice (4) Response

a.

<CH>=2<CHe>

b.

<CH>=2<CHe>

c.

<CH>=<CHe>

d.

<CH>=<CHe>2

Question number: 1528

» Thermodynamics » Concept of Temperature

MCQ▾

Question

One mole of a perfect gas in a cylinder fitted with a piston has a pressure P . volume V and temperature T. If the temperature is increased by 2 K keeping pressure constant, the increase in volume is

Choices

Choice (4) Response

a.

V274

b.

V91

c.

2V273

d.

V

Question number: 1529

» Kinetic Theory of Gases » Kinetic Energy and Temperature

MCQ▾

Question

For a gas at a temperature T the root-mean-square velocity V r. m. s, the most probable speed V mp, and the average speed V av obey the relationship

Choices

Choice (4) Response

a.

vrms>vav>vmp

b.

vmp>vav>vrms

c.

vmp>vav>vrms

d.

vav>vrms>vmp

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