Increasing order of boiling points in the following compounds is: CH 3 COOH ( i ) CH 3 CH 2 CHO ( ii ) CH 3 CH 2 CH 2 OH ( iii ) CH 3 COCH 3 ( iv )

( ii ) < ( i v ) < ( i i i ) < ( i )

( ii ) < ( i v ) > ( i i i ) < ( i )

( iv ) < ( ii ) > ( i ) < ( iii )

( iv ) < ( iii ) < ( ii ) < ( i )

Match the type of interaction in column A with the distance dependence of their interaction energy in column B : A B (i) ion - ion (a) 1 r (ii) Dipole - dipole (b) 1 r 2 (iii) London dispersion (c) 1 r 3 (d) 1 r 6

(i) – (a); (ii) – (c); (iii) – (d)

(i) – (b); (ii) – (d); (iii) – (c)

(i) – (a); (ii) – (b); (iii) – (d)

(i) – (a); (ii) – (b); (iii) – (c)

A piston filled with 0.04 mol of an ideal gas expands reversibly from 50.0 mL to 375 mL at a constant temperature of 3 7 . 0 ∘ C . As it does so, it absorbs 208 J of heat. The values of q and w for the process will be (R = 8.314 J/mol K) (ln7.5 = 2.01)

q = + 2 0 8 J , w ⁡ = - 2 0 8 J

q = + 2 0 8 J , w ⁡ = + 2 0 8 J

q = - 2 0 8 J , w ⁡ = - 2 0 8 J

MEDIUM

Earn 100

Explain London dispersion forces.

Important Questions on States of Matter: Gaseous and Liquid States

EASY

Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Intermolecular Forces

A piece of ice falls from a height

h

so that it melts completely. Only one-quarter of the heat produced is absorbed by the ice and all energy of ice gets converted into heat during its fall. The value of

h

is:
(Latent heat of ice is

3.4 \times 10^{5} {J kg}^{- 1}

and

g = 10 {N kg}^{- 1}

)

EASY

Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Intermolecular Forces

The relative strength of the interionic/ intermolecular forces in a decreasing order is:

EASY

Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Intermolecular Forces

Increasing order of boiling points in the following compounds is:

$\underset{(i)}{{CH}_{3} COOH} \underset{(ii)}{{CH}_{3} {CH}_{2} CHO} \underset{(iii)}{{CH}_{3} {CH}_{2} {CH}_{2} OH} \underset{(iv)}{{CH}_{3} {COCH}_{3}}$

MEDIUM

Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Intermolecular Forces

The combination of plots which does not represent isothermal expansion of an ideal gas is

$(A)$ Question Image

$(B)$

$(C)$

$(D)$

MEDIUM

Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Intermolecular Forces

Give reason:

H_{2} O

is a liquid and

H_{2} S

is a gas.

HARD

Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Intermolecular Forces

An ideal gas undergoes isothermal compression from

5 m^{3}

1 m^{3}

against a constant external pressure of

4 N m^{- 2}

. The heat released in this process is

24 J {mol}^{- 1} K^{- 1}

and is used to increase the pressure of

1

mole of

Al

. The temperature of

Al

increases by:

EASY

Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Intermolecular Forces

The predominant intermolecular forces present in ethyl acetate, a liquid, are:

MEDIUM

Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Intermolecular Forces

A system consisting of 1 mol of an ideal gas undergoes a reversible process,

A \to B \to C \to A

(schematically indicated in the figure below). If the temperature at the starting point A is 300 K and the work done in the process

B \to C

is 1 L atm, the heat exchanged in the entire process in L atm is

Question Image

MEDIUM

Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Intermolecular Forces

In which of the following solid substance dispersion forces exist?

HARD

Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Intermolecular Forces

The dipole-dipole interaction energy between rotating polar molecules is proportional to, where '

r

' is the distance between polar molecules.

HARD

Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Intermolecular Forces

A reversible cyclic process for an ideal gas is shown below. Here,

P, V, a n d T

are pressure, volume and temperature, respectively. The thermodynamic parameters

q, w, H a n d U

are heat, work, enthalpy and internal energy, respectively.

Question Image

The correct option(s) is (are)

MEDIUM

Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Intermolecular Forces

Match the type of interaction in column $A$ with the distance dependence of their interaction energy in column $B :$

A	B
(i) ion - ion	(a) $\frac{1}{r}$
(ii) Dipole - dipole	(b) $\frac{1}{r^{2}}$
(iii) London dispersion	(c) $\frac{1}{r^{3}}$
	(d) $\frac{1}{r^{6}}$

HARD

Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Intermolecular Forces

The above

P - V

diagram represents the thermodynamic cycle of an engine, operating with an ideal mono-atomic gas. The amount of heat, extracted from the source in a single cycle, is:

MEDIUM

Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Intermolecular Forces

The qualitative sketches I, II and III given below show the variation of surface tension with molar concentration of three different aqueous solutions of KCl,

C H_{3} O H

and

C H_{3} {(C H_{2})}_{11} O S O_{3}^{-} N a^{+}

at room temperature. The correct assignment of the sketches is -

Question Image

MEDIUM

Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Intermolecular Forces

A piston filled with 0.04 mol of an ideal gas expands reversibly from 50.0 mL to 375 mL at a constant temperature of

37 . 0^{\circ} C

. As it does so, it absorbs 208 J of heat. The values of q and w for the process will be
(R = 8.314 J/mol K) (ln7.5 = 2.01)

EASY

Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Intermolecular Forces

Calculate the work done during compression of

2

mol of an ideal gas from a volume of

1 m^{3}

10

{dm}^{3}

300 K

against a pressure of

100 kPa

EASY

Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Intermolecular Forces

The work done during combustion of

9 \times 10^{- 2}

kg

of ethane,

C_{2} H_{6} (g)

300 K

is (Given

R = 8 .314 {JK}^{- 1} {mol}^{- 1}

, atomic mass

C = 12, H = 1

)

MEDIUM

Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Intermolecular Forces

Dipole - induced dipole interactions are present between which of the following pairs?

MEDIUM

Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Intermolecular Forces

Rare gases are sparingly soluble in water because of

MEDIUM

Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Intermolecular Forces

Given:

Question Image

On the basis of data given above, predict which of the following gases shows the least adsorption on a definite amount of charcoal?

Explain London dispersion forces.

Important Questions on States of Matter: Gaseous and Liquid States

Learn and Prepare for any exam you want !

Explain London dispersion forces.