Gaseous State Test

Result

Gaseous State Test - 3

Score
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Weekly Quiz Competition

Question 1
1 / -0

For which of the following parameters the structural isomers C₂H₅OH and CH₃OCH₃ would be expected to have the same values?
(Assume ideal behaviour)

A
Heat of vaporization

B
Gaseous densities at the same temperature and pressure

C
Boiling points

D
Vapour pressure at the same temperature

Solution

∴ the molecular weight of C₂H₅OH & CH₃OCH₃ are same so in its vapour phase at same temperature & pressure the densities will be same
Question 2
1 / -0

Which one of the following statements is NOT true about the effect of an increase in temperature on the distribution of molecular speeds in a gas?

A
The most probable speed increases

B
The fraction of the molecules with the most probable speed increases

C
The distribution becomes broader

D
The area under the distribution curve remains the same as under the lower temperature

Solution

Most probable velocity increase and fraction of molecule possessing most probable velocity decreases.
Hence, option B is correct.
Question 3
1 / -0

An ideal gas expands in volume from 1×10^-3 m³ to 1×10^-2 m³ at 300 K against a constant pressure of 1×10⁵ Nm^-2. The work done is

A
-900 J

B
900 kJ

C
2780 kJ

D
-900 kJ

Solution

Work done = -P(ΔV)
= - 1×10⁵ [10^-2 – 10^-3] = - 900 J