Kinetic Theory Test

Result

Kinetic Theory Test - 83

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Weekly Quiz Competition

Question 1
1 / -0

A certain gas diffuses four times as quickly as oxygen. The molecular weight of the gas is

A
2

B
1

C
16

D
1.5

Solution
Question 2
1 / -0

The density in grams per liter of ethylene $$ (C_2H_4) $$ at STP is-

A
$$1.25$$

B
$$2.50$$

C
$$3.75$$

D
$$5.25$$

Solution
Question 3
1 / -0

Two contains are filled, each with a different gas,The two containers are at the same temperature.Suppose that the molecular weight of the two gases are $$ M_A and M_B $$ the average moments (in magnitude) of the molecules are related as:

A
$$ P_A = P_B $$

B
$$ P_A = \frac {M_B}{M_A} P_B $$

C
$$ P_ A=\left( \frac { M_ A }{ M_ B } \right)^{1/2} P_B $$

D
$$ P_ A=\left( \frac { M_ B }{ M_ A } \right)^{1/2} P_B $$

Solution
Question 4
1 / -0

At what temperature the mean speed of the molecules of hydrogen gas equals the escape speed from the earth?

A
$$11527^{ \circ }C$$

B
11527 K

C
$$1180^{ \circ }C$$

D
11800 K

Solution
Question 5
1 / -0

The average speed v and r.m.s. speed $$\bar { v } $$ of the molecules are related as

A
$$\bar { v } =0.92v$$

B
$$\bar { v }^2 =0.29v$$

C
$$\bar { v} =v$$

D
$$C=0.92\bar { C } $$

Solution
Question 6
1 / -0

The minimum amount of energy that the reacting molecules must possess at the time of collisions in order to produce effective collision is called

A
Activation energy

B
Threshold energy

C
Internal energy

D
Free energy.

Solution
Question 7
1 / -0

At NTP the density of a gas is $$1.3 kg\ m^{-3} $$ and the velocity of sound propagation in the gas is$$ 330\ ms^{-1} $$. The degree of freedom of the gas molecule is

A
3

B
5

C
6

D
7

Solution
Question 8
1 / -0

A monatomic ideal gas undergoes a process in which the ratio of P to V at any instant is constant and equals to 1. What is the molar heat capacity of the gas?

A
4R/2

B
3R/2

C
5R/2

D
0

Solution
Question 9
1 / -0

The temperature at which the average speed of oxygen molecules is double that of the same molecules at $$0^oC$$ is _________.

A
546 K

B
1092 K

C
277 K

D
$$1911^oC$$

Solution
Question 10
1 / -0

$$4.48L$$ of an ideal gas at STP requires 12.0 calories to raise its temperature by $${ 15 }^{ 0 }$$C at constant volume. The $${ C }_{ p }$$ of the gas is:

A
3 cal

B
4 cal

C
7 cal

D
6 cal

E
9 cal

Solution