When an ideal gas undergoes unrestrained expansion, no cooling occurs because the molecules _____________

(a)

are above inversion temperature

(b)

exert no attractive forces on each other

(c)

do work equal to the loss in kinetic energy

(d)

collide without loss of energy

The temperatures at which real gases obey the ideal gas laws over a wide range of pressure is called ____________-

(a)

Critical temperature

(b)

Boyle temperature

(c)

Inversion temperature

(d)

Reduced temperature

The value of universal gas constant depends upon __________

(a)

Temperature of the gas

(b)

Volume of the gas

(c)

Number of moles of the gas

(d)

units of Pressure and volume.

Use of hot air balloon in sports at meteorological observation is an application of __________________

(a)

Boyle's law

(b)

Newton's law

(c)

Kelvin's law

(d)

Brown's law

Consider the following statements
i) Atmospheric pressure is less at the top of a mountain than at sea level
ii) Gases are much more compressible than solids or liquids
iii) When the atmospheric pressure increases the height of the mercury column rises.
Select the correct statement

(a)

I and II

(b)

II and III

(c)

I and III

(d)

I, II and III

The variation of volume V, with temperature T, keeping pressure constant is called the coefficient of thermal expansion ie \(\alpha =\frac { 1 }{ V } { \left( \frac { \partial V }{ \partial T } \right) }_{ P }\) For an ideal gas a is equal to ___________

(a)

T

(b)

1/T

(c)

P

(d)

none of these

Assertion: Critical temperature of CO₂ is 304K, it can be liquefied above 304K.
Reason : For a given mass of gas, volume is to directly proportional to pressure at constant temperature

(a)

both assertion and reason are true and reason is the correct explanation of assertion

(b)

both assertion and reason are true but reason is not the correct explanation of assertion

(c)

assertion is true but reason is false

(d)

both assertion and reason are false

Which of the following diagrams correctly describes the behaviour of a fixed mass of an ideal gas? (T is measured in K)

(a)

(b)

(c)

(d)

All of these

Pressure is _____________

(a)

Force/ area

(b)

force x Area

(c)

Area/ force

(d)

Force / area \(\times\) volume

The unit of pressure is _____________

(a)

Pascal

(b)

Torr

(c)

Bar

(d)

all the above

The standard atmospheric pressure is the pressure that supports a column of mercury exactly ___________ high at 0° C at sea level.

(a)

760mm

(b)

76 cm

(c)

both a & b

(d)

760 cm

V/T = constant is _____________ law.

(a)

Gay Lussac

(b)

Boyle's

(c)

Dalton's

(d)

Charles

The absolute zero is _____________

(a)

-273^oC

(b)

273^oC

(c)

OK

(d)

both a and c

The partial pressure of dry gas is ____________

(a)

greater than that of wet gas

(b)

lesser than that of wet gas

(c)

equal to that of wet gas

(d)

none of these

Identify the correct mathematical expression of Graham's law of diffusion __________

(a)

\(\frac { { r }_{ 2 } }{ { r }_{ 1 } } =\sqrt { \frac { { M }_{ 2 } }{ { M }_{ 1 } } } \)

(b)

\({ r }_{ 1 }r_{ 2 }=\sqrt { \frac { { M }_{ 2 } }{ { M }_{ 1 } } } \)

(c)

\(\frac { { r }_{ 1 } }{ { r }_{ 2 } } =\sqrt { \frac { { M }_{ 2 } }{ { M }_{ 1 } } } \)

(d)

\(\frac { { r }_{ 1 } }{ { r }_{ 2 } } ={ \left[ \frac { { M }_{ 2 } }{ { M }_{ 1 } } \right] }^{ 2 }\)

What is the dominant intermolecular force or bond that must be overcome in converting liquid methanol to a gas?

(a)

London dispersion force

(b)

Hydrogen bonding

(c)

Dipole-dipole interaction

(d)

Covalent bonds

When the gas behaves ideally, the compression factor Z is ___________

(a)

> 1

(b)

< 1

(c)

= 0

(d)

= 1

Which of the following gas(es) always show positive deviation from ideal behaviour?

(a)

CH₄

(b)

CO₂

(c)

NH₃

(d)

H₂

Viscosity of a liquid is a measure of ___________

(a)

repulsive forces between the liquid molecules

(b)

frictional resistance

(c)

intermolecular forces between the molecules

(d)

none of the above