Diffusion is the process of movement of molecules under a concentration gradient. It is the movement of molecules from a region of higher concentration to a region of lower concentration down the concentration gradient. It mostly happens in liquids and gases because their particles move randomly from place to place.

MEDIUM

Earn 100

Select correct statements:
(1) Gases which have high value of van der Waals constant 'a' are easily liquefied.
(2) Easily liquefiable gases are water soluble.
(3) Gases which forms ions in a solvent are soluble in that solvent.
(4) Under same conditions, ${NH}_{3}$ has low solubility in water than that of ${CO}_{2} .$

50% studentsanswered this correctly

Important Questions on States of Matter: Gases and Liquids

EASY

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Classification of States of Matter

Define diffusion.

HARD

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Classification of States of Matter

Would it be easier to drink water with a straw on the top of Mount Everest

?

EASY

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Classification of States of Matter

A gas can be compressed to a fraction of its volume. The same volume of a gas can be spread all over a room. The reason for this is that

EASY

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Classification of States of Matter

Gases do not settle at the bottom of a container. Explain.

EASY

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Classification of States of Matter

What are the factors upon which the behaviour of gases do not depend?

MEDIUM

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Classification of States of Matter

In a closed room of

1000 m^{3}

a perfume bottle is opened up. The room develops a smell. This is due to which property of gases?

EASY

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Classification of States of Matter

Gases have _____ density. (least/most)

HARD

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Classification of States of Matter

A bulb of constant volume is attached to a manometer tube open at another end as shown in the figure. The manometer is filled with a liquid of density

{(\frac{1}{3})}^{rd}

that of mercury. Initially,

h

was

456 cm

.

Through a small hole in the bulb, gas is leaked. Assuming, pressure decreases as

\frac{dp}{dt} = - KP

, if the value of

h

228 cm

after

28 minutes

. What is the value of

K

({in hour}^{-1})

\{Take log \frac{57}{38} = 0.28 and density of Hg = {13.6 g mL}^{- 1}\}

HARD

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Classification of States of Matter

Why do astronauts have to wear protective suits when they are on the surface of moon

?

HARD

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Classification of States of Matter

Two gases

A

and

B

, having the mole ratio of

3 : 5

in a container, exert a pressure of

8 atm

. If

A

is removed, what would be the pressure due to

B

only, temperature remaining constant?

EASY

Chemistry>Physical Chemistry>States of Matter: Gases and Liquids>Classification of States of Matter

Whenever there is an experiment in the laboratory, hydrogen sulphide gas (offensive odour) is prepared for some test. There is a smell of the gas which we can observe