Kinetic Theory of Gases Test

Result

Kinetic Theory of Gases Test - 16

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Weekly Quiz Competition

Question 1
4 / -1

At what temperature is the root mean square velocity of gaseous hydrogen molecules equal to that of oxygen molecules at 47^o C?

A
–73 K

B
80 K

C
20 K

D
3 K

Solution
Question 2
4 / -1

When temperature of an ideal gas is increased from 27^o C to 227^o C, its rms speed changed from 400 ms^–1 to V_s. The V_s is

A
516 ms^–1

B
746 ms^–1

C
310 ms^–1

D
450 ms^–1

Solution
Question 3
4 / -1

The rms speed of the molecules of a gas at a pressure 10⁵ Pa and temperature 0^o C is 0.5 km/s. If the pressure is kept constant but temperature is raised to 819^o C, the rms speed becomes

A
1.5 kms^–1

B
2 kms^–1

C
1 kms^–1

D
5 kms^–1

Solution
Question 4
4 / -1

The root mean square velocity of a gas molecule of mass m at a given temperature is proportional to

A
m^o

B
m^–1/2

C
m^1/2

D
m

Solution
Question 5
4 / -1

The ratio of the vapour densities of two gases at a given temperature is 9:8, The ratio of the rms velocities of their molecule is

A
2:3√2

B
2√2 : 3

C
9:8

D
8:9

Solution
Question 6
4 / -1

For a gas, the rms speed at 800 K is

A
Four times the value at 200 K

B
Twice the value at 200 K

C
Half the value at 200 K

D
same as at 200 K

Solution
Question 7
4 / -1

The temperature of an ideal gas is increased from 27^o C to 927^o C. The root mean square speed of its molecules becomes

A
Four times

B
One-fourth

C
Half

D
Twice

Solution
Question 8
4 / -1

At a given temperature the root mean square velocities of Oxygen and hydrogen molecules are in the ratio

A
1:4

B
1:16

C
16:1

D
4:1

Solution
Question 9
4 / -1

If mass of He atom is 4 times that of hydrogen atom, then rms speed of the is

A
Two times of H – v_rms speed

B
Four times of H – v_rms speed

C
Same as of H – v_rms speed

D
half of H – v_rms speed

Solution
Question 10
4 / -1

At temperature T, the rms speed of helium molecules is the same as rms speed of hydrogen molecules at normal temperature and pressure. The value of T is

A
546^o C

B
0^o C

C
273^o C

D
136.5^o C

Solution