Gases Set 1 - ilmijazeera

Results

#1. A real gas obeying Vander Waal’s equation will resemble ideal gas if:

both ‘a’ and ‘b’ are large

both ‘a’ and ‘b’ are small

‘a’ is small and ‘b’ is large

‘a’ is large and ‘b’ is small

#2. Deep sea divers breath mixture of nitrogen and oxygen in a ratio of:

96% N2 and 4% O2

4% and N2 and 96% O2

80% N2 and 20% O2

20% N2 and 80% O2

#3. One mole of any gas at STP occupies volume

2.24 dm3

22.4 dm3

44.4 dm3

48.4 dm3

#4. K.E. of gas molecules is equal to:

Ek=3/2RT

Ek=2/3RT

Ek=3/2RT

None

#5. All gases solidify before reaching at

373 oK

273 oC

– 473 oC

0 oK

#6. Kinetic equation is equal to

P V = n R T

P V = R T

PV = m n c2

#7. Root mean square velocity is equal to

υ rms = √(3RT)/M.

υ rms = √(3RT)/N

υ rms = √(2RT)/M

None

#8. Kinetic energy associated with one molecule of a gas due to translational motion is given by

EK = 1/2mv2

Ek = m v2

Ek = m n c2

Ek = mnc

#9. Density of gas is usually expressed as

kg m–3 (b) (c(d)

kg dm–3

g dm–3

g cm–3

#10. Weight of one dm3 of O2 at STP is

1.4384 gm

1.4394 gm

1.6384 gm

1.3384 gm

Finish