NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1527 - 1531 of 2320

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Question number: 1527

» Atoms and Nuclei » Radioactive Decay Law

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MCQ▾

Question

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

(Given log 10 e = 0.4343)

Choices

Choice (4)Response

a.

16.5 days

b.

33 days

c.

76 days

d.

3.8 days

Question number: 1528

» Kinetic Theory of Gases » Kinetic Energy and Temperature

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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.

b.

c.

d.

Question number: 1529

» Thermodynamics » Concept of Temperature

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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.

b.

c.

d.

Question number: 1530

» Kinetic Theory of Gases » Kinetic Energy and Temperature

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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.

b.

c.

d.

Question number: 1531

» Thermodynamics » Concept of Temperature

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MCQ▾

Question

If 300 ml of gas at 17°C is cooled to 7°C at constant pressure, then its final volume will be,

Choices

Choice (4)Response

a.

280.45 ml

b.

135.35 ml

c.

289.65 ml

d.

540.23 ml

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