Kinetic Theory Test

Result

Kinetic Theory Test - 62

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following statements about kinetic theory of gases is wrong

A
The molecules of a gas are in continuous random motion

B
The molecules continuously undergo inelestic collisions

C
The molecules do not interact with each other excepted during collisions

D
The collisions among the molecules are of short duration

Solution
Question 2
1 / -0

The pressure in the tyre of a car is four times the atmospheric pressure at $$300\, K$$. If this tyre suddenly bursts, its new temperature will be $$(\gamma = 1.4)$$

A
$$300(4)^{1.4/0.4}$$

B
$$300\,\left(\dfrac{1}{4}\right)^{-0.4/1.4}$$

C
$$300(2)^{-0.4/1.4}$$

D
$$300(4)^{-0.4/1.4}$$
Question 3
1 / -0

The specific heat of a monatomic gas at constant volume is $$0.075 kcal$$ $$ k g^{-1} K^{-1} . $$ Its atomic weight will be

A
$$10$$

B
$$30$$

C
$$40$$

D
$$90$$

Solution
Question 4
1 / -0

A vessel contains 3.20 g of oxygen and $$2.80 g$$ of nitrogen. The vessel is moving with a velocity $$100 \mathrm { m } / \mathrm { s }$$ . The vessel is suddenly stopped. Find the change in temperature -

A
$$7.2 ^ { \circ } \mathrm { C }$$

B
$$6.0 ^ { \circ } \mathrm { C }$$

C
$$8.3 ^ { \circ } \mathrm { C }$$

D
$$6.5 ^ { \circ } \mathrm { C }$$
Question 5
1 / -0

The mass of litre of dry air at N.T.P is 1.293 g . Find the mass of 3 litres of air at $$117^oC$$ and a pressure of 4 atmospheres _____.

A
10.86 g

B
5.6 g

C
6.4 g

D
7.2 g

Solution
Question 6
1 / -0

The mean free path of nitrogen molecules at a pressure of 1.0 atm and temperature $$ 0^0 C $$ is $$ 0.8 \times 10^{-7} m $$. If the number of density of molecules is $$ 2.7 \times 10^{25} $$ per $$ m^3 $$, then the molecular diameter is

A
$$0.32 nm$$

B
$$ 3.2 A^0 $$

C
$$ 3.2 \mu m $$

D
$$2.3 mm$$

Solution
Question 7
1 / -0

The temperature at which the rms of a hydrogen molecule is equal to that of an oxygen molecule at $$47^{\circ}C$$ is

A
-253 K

B
-73 K

C
3 K

D
20 K

Solution
Question 8
1 / -0

A sample of gas is at $$0^{\circ}C$$. To what temperature must it be raised in order to double the rms speed of its molecules?

A
$$102^{\circ}C$$

B
$$273^{\circ}C$$

C
$$819^{\circ}C$$

D
$$1092^{\circ}C$$

Solution
Question 9
1 / -0

The specific heat of a substance is $$0.09 cal/gm^oC$$. If the temperature is measured on Pahrenhelt scale the value of its specific heat in $$cal/gm/^oF$$ is _________.

A
0.05

B
0.9

C
0.005

D
0.5

Solution
Question 10
1 / -0

Heat capacity at constant temperature and constant pressure for $${ H }_{ 2 }$$ is :-

A
5 cal $${ moI }^{ -1 }{ K }^{ -1 }$$

B
7 cal $${ moI }^{ -1 }{ K }^{ -1 }$$

C
8 cal $${ moI }^{ -1 }{ K }^{ -1 }$$

D
$$\infty $$

Solution