EASY

Earn 100

What is critical temperature?

Important Questions on Surface Chemistry

MEDIUM

Chemistry>Physical Chemistry>Surface Chemistry>Adsorption

Give two differences between physical adsorption and chemical adsorption.

MEDIUM

Chemistry>Physical Chemistry>Surface Chemistry>Adsorption

Write the difference between physical adsorption and chemical adsorption. (Any six points).

MEDIUM

Chemistry>Physical Chemistry>Surface Chemistry>Adsorption

The variation of physical adsorption with temperature is shown by

MEDIUM

Chemistry>Physical Chemistry>Surface Chemistry>Adsorption

Which of the following statements regarding the adsorption of gases on solid surface is FALSE?

EASY

Chemistry>Physical Chemistry>Surface Chemistry>Adsorption

Which one of the following is not a property of physical adsorption?

HARD

Chemistry>Physical Chemistry>Surface Chemistry>Adsorption

Physisorption of ą gas is spontaneous at

77 K

. The effect of increase in temperature on physisorption is

MEDIUM

Chemistry>Physical Chemistry>Surface Chemistry>Adsorption

Why does physisorption decrease with rise of temperature ?

MEDIUM

Chemistry>Physical Chemistry>Surface Chemistry>Adsorption

3 g

of activated charcoal was added to

50 mL

of acetic acid solution

(0.06 N)

in a flask. After an hour, it was filtered and the strength of the filtrate was found to be

0.042 N

. The amount of acetic acid adsorbed (per gram of charcoal) is:

MEDIUM

Chemistry>Physical Chemistry>Surface Chemistry>Adsorption

Which of the following Absorption-Temperature graphs represent the variation of physical adsorption with temperature?

EASY

Chemistry>Physical Chemistry>Surface Chemistry>Adsorption

Which of the following is not true for physical adsorption?

EASY

Chemistry>Physical Chemistry>Surface Chemistry>Adsorption

Given below are the critical temperatures of some of the gases:

Gas	Critical temperature $(K)$
$He$	$5.2$
${CH}_{4}$	$190$
${CO}_{2}$	$304.2$
${NH}_{3}$	$405.5$

The gas showing least adsorption on a definite amount of charcoal is

HARD

Chemistry>Physical Chemistry>Surface Chemistry>Adsorption

What are different types of adsorption? Give any four differences between characteristics of these different types.

EASY

Chemistry>Physical Chemistry>Surface Chemistry>Adsorption

Which one of the following is not true with regard to physisorption?

EASY

Chemistry>Physical Chemistry>Surface Chemistry>Adsorption

The type of absorption is highly specific and takes place at high temperature with unimolecular layer is

EASY

Chemistry>Physical Chemistry>Surface Chemistry>Adsorption

Match List I with List II

List I		List II
A	Physisorption	I	Single Layer Adsorption
B	Chemisorption	II	$20 - 40 kJ {mol}^{- 1}$
C	$N_{2} (g) + 3 H_{2} (g) \overset{Fe (s)}{⟶} 2 {NH}_{3} (g)$	III	Chromatography
D	Analytical Application or Adsorption	IV	Heterogeneous catalysis

Choose the correct answer from the options given below:

EASY

Chemistry>Physical Chemistry>Surface Chemistry>Adsorption

Methylene blue, from its aqueous solution, is adsorbed on activated charcoal at 25^oC. For this process, the correct statement is

EASY

Chemistry>Physical Chemistry>Surface Chemistry>Adsorption

Which one of the following characteristics is associated with adsorption?

MEDIUM

Chemistry>Physical Chemistry>Surface Chemistry>Adsorption

Why does physisorption decrease with increase of temperature?

EASY

Chemistry>Physical Chemistry>Surface Chemistry>Adsorption

The extent of physical adsorption of a gas increases with

MEDIUM

Chemistry>Physical Chemistry>Surface Chemistry>Adsorption

The following graph is obtained for physisorption of a gas as a function of pressure at different temperatures.
Question Image

The correct order of the temperatures is:

What is critical temperature?

Important Questions on Surface Chemistry

Learn and Prepare for any exam you want !