States of Matter (NEET Chemistry): Questions 42 - 48 of 103

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Question number: 42

» States of Matter » Gaseous State » Concept of Average, Root Mean Square and Most Probable Velocities

MCQ▾

Question

Calculate the pressure exerted by 1023 gas molecules each of mass 10-22 g in a container of volume 1 litre, the rms speed is 105cm s-1?

Choices

Choice (4) Response

a.

33.0×107 dyne cm

b.

3.33×107 dyne cm-2

c.

3.56 cm-2

d.

None of the above

Question number: 43

» States of Matter » Liquid State » Viscosity

MCQ▾

Question

The mathematical expression for vapour pressure is?

Choices

Choice (4) Response

a.

CR/T=P

b.

P = CRT

c.

PR=CT

d.

PC = RT

Question number: 44

» States of Matter » Gaseous State » Gas Laws - Boyle's Law, Charle's Law, Graham's Law of Diffusion

MCQ▾

Question

A sample of a gas occupies a volume of 512 ml at 20℃ and 74 cm of Hg as pressure. What volume would this gas occupy at STP?

Choices

Choice (4) Response

a.

580 ml

b.

485.3 ml

c.

546 ml

d.

464.5 ml

Question number: 45

» States of Matter » Gaseous State » Gas Laws - Boyle's Law, Charle's Law, Graham's Law of Diffusion

MCQ▾

Question

Rate of diffusion of a gas is directly proportional to?

Choices

Choice (4) Response

a.

Square of its molecular mass

b.

inversely proportional to the square root of its density

c.

its molecular mass

d.

its density

Question number: 46

» States of Matter » Gaseous State » Gas Laws - Boyle's Law, Charle's Law, Graham's Law of Diffusion

MCQ▾

Question

Which one of the following does not represent Boyles law?

Choices

Choice (4) Response

a.

T2V1=T1V2

b.

PV=constant

c.

V1/P

d.

P1V1=P2V2

Question number: 47

» States of Matter » Gaseous State » Kinetic Theory of Gases

MCQ▾

Question

At what temperature is the kinetic energy of a gas molecule half of its value at 327℃?

Choices

Choice (4) Response

a.

13.5 ℃

b.

-123 ℃

c.

45℃

d.

27℃

Question number: 48

» States of Matter » Gaseous State » Concept of Average, Root Mean Square and Most Probable Velocities

MCQ▾

Question

Calculate the root mean square speed of hydrogen molecule at STP?

Choices

Choice (4) Response

a.

1844.9 ms-1

b.

1722.7 ms-1

c.

156 ms-1

d.

1454.8 ms-1

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