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)

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Statement-I. The boiling point of ${NH}_{3}$ lies between that of ${SbH}_{3}$ and ${BiH}_{3}$ .

Statement-2. ${PH}_{3}$ has much lower boiling point than ${NH}_{3}$ but it increases from ${PH}_{3}$ to ${AsH}_{3}$ to ${SbH}_{3}$ to ${BiH}_{3}$ due to increase in van der Waals forces.

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Important Questions on States of Matter

EASY

Chemistry>Physical Chemistry>States of Matter>Intermolecular Forces and Thermal Energy

Increasing order of boiling points in the following compounds is:

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

EASY

Chemistry>Physical Chemistry>States of Matter>Intermolecular Forces and Thermal Energy

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

MEDIUM

Chemistry>Physical Chemistry>States of Matter>Intermolecular Forces and Thermal Energy

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) $\frac{1}{r^{6}}$

EASY

Chemistry>Physical Chemistry>States of Matter>Intermolecular Forces and Thermal Energy

The dipole-dipole interaction energy between stationary polar molecules and rotating polar molecules, respectively is proportional to
[

r

is the distance between the polar molecules]

MEDIUM

Chemistry>Physical Chemistry>States of Matter>Intermolecular Forces and Thermal Energy

In which of the following pairs, the second compound is more polar than the first ?

EASY

Chemistry>Physical Chemistry>States of Matter>Intermolecular Forces and Thermal Energy

The interaction energy of London forces between two particles is proportional to

r^{x}

, where

r

is the distance between the particles. The value of

x

is :

EASY

Chemistry>Physical Chemistry>States of Matter>Intermolecular Forces and Thermal Energy

The type of attractive forces that operate between gaseous

HCl

molecules is

HARD

Chemistry>Physical Chemistry>States of Matter>Intermolecular Forces and Thermal Energy

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

r

' is the distance between polar molecules.

EASY

Chemistry>Physical Chemistry>States of Matter>Intermolecular Forces and Thermal Energy

The intermolecular interaction that is dependent on the inverse cube of distance between the molecules is:

EASY

Chemistry>Physical Chemistry>States of Matter>Intermolecular Forces and Thermal Energy

Which intermolecular force is most responsible in allowing xenon gas to liquefy?

MEDIUM

Chemistry>Physical Chemistry>States of Matter>Intermolecular Forces and Thermal Energy

In which of the following solid substance dispersion forces exist?

MEDIUM

Chemistry>Physical Chemistry>States of Matter>Intermolecular Forces and Thermal Energy

Find out the correct order of ionic character in the following molecules

$(i) {SO}_{2}$ $(ii) K_{2} O$ $(iii) N_{2}$ $(iv) LiF$

MEDIUM

Chemistry>Physical Chemistry>States of Matter>Intermolecular Forces and Thermal Energy

Given:

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

MEDIUM

Chemistry>Physical Chemistry>States of Matter>Intermolecular Forces and Thermal Energy

Rare gases are sparingly soluble in water because of

MEDIUM

Chemistry>Physical Chemistry>States of Matter>Intermolecular Forces and Thermal Energy

Give reason:

H_{2} O

is a liquid and

H_{2} S

is a gas.

EASY

Chemistry>Physical Chemistry>States of Matter>Intermolecular Forces and Thermal Energy

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}

)

MEDIUM

Chemistry>Physical Chemistry>States of Matter>Intermolecular Forces and Thermal Energy

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

EASY

Chemistry>Physical Chemistry>States of Matter>Intermolecular Forces and Thermal Energy

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

EASY

Chemistry>Physical Chemistry>States of Matter>Intermolecular Forces and Thermal Energy

The most polarisable ion among the following is.

EASY

Chemistry>Physical Chemistry>States of Matter>Intermolecular Forces and Thermal Energy

The number of

π

-bonds and

σ

-bonds present in naphthalene are respectively

Statement-I. The boiling point of NH3 lies between that of SbH3 and BiH3 . Statement-2. PH3 has much lower boiling point than NH3 but it increases from PH3 to AsH3 to SbH3 to BiH3 due to increase in van der Waals forces.

Important Questions on States of Matter

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Statement-I. The boiling point of ${NH}_{3}$ lies between that of ${SbH}_{3}$ and ${BiH}_{3}$ .

Statement-2. ${PH}_{3}$ has much lower boiling point than ${NH}_{3}$ but it increases from ${PH}_{3}$ to ${AsH}_{3}$ to ${SbH}_{3}$ to ${BiH}_{3}$ due to increase in van der Waals forces.