On colliding with the walls in a closed container, the ideal gas molecules _______________

(a)

transfer momentum to the walls

(b)

lose momentum completely

(c)

move with smaller speeds

(d)

perform Brownian motion.

The speeds of 5 molecules of a gas (in arbitrary units) are as follows: 2, 3, 4, 5, 6 The root mean square speed for these molecule is _________________.

(a)

2.91

(b)

3.52

(c)

4.00

(d)

4.24

At absolute zero temperature, the K.E. of the molecules becomes ________

(a)

zero

(b)

maximum

(c)

minimum

(d)

none of these

If the rms speed of the molecules of a gas is 1000 ms^-1 the average speed of the molecule is ______________.

(a)

1000 ms^-1

(b)

922 ms^-1

(c)

780 ms^-1

(d)

849 ms^-1

The gas having average molecular speed four times that of SO₂ (molecular mass 64) is _______________

(a)

He (molecular mass 4)

(b)

O₂ (molecular mass 32)

(c)

H₂ (molecular mass 2)

(d)

CH₄ (molecular mass 16)