MCQs of Surface Chemistry

Showing 111 to 120 out of 203 Questions

111.

On the basis of which of the following postulates, is Langmuir adsorption isotherm derived ?

(a)	all adsorption sites are equal.
(b)	Adsorbed molecules reacts with one another.
(c)	Adsorption occurs on multi molecular layers.
(d)	Adsorption change as thermal sites change.

112.

Which conditions of temperature and pressure are suitable for van der Waals’ adsorption (physical) ?

(a)	High temperature and high pressure.
(b)	High temperature and low pressure.
(c)	Low temperature and high pressure.
(d)	Low temperature and low pressure.

113.

Which of the following gases has highest critical temperature ?

114.

Which of the following relations is correct ?

(i) $\frac{x}{m} = Constant (at high pressure)$

(ii) $\frac{x}{m} = Constant \times p^{\frac{1}{n}} (at medium pressure)$

(iii) $\frac{x}{m} = Constant \times p^{n} (at low pressure)$

115.

\frac{x}{m} = {Kp}^{\frac{1}{n}}

if n = 5, select the correct option.

(a)	The plot of $\frac{x}{m} \to p$ is linear and the value of slope is 5.
(b)	The plot of log $\frac{x}{m} \to p$ is a straight line and the value of slope is 5.
(c)	The plot of $\frac{x}{m} \to \log p$ is a straight line and the value of slope is 0.2.
(d)	The plot of $\frac{x}{m} \to p$ is a curve and the value of the tangent is 0.2.

116.

What is the approximate value of energy produced in chemical adsorption ?

117.

Which phenomenon will occur when water is added to anhydrous Calcium chloride ?

118.

Which of the following biochemical catalysts plays an important role in the hydrolysis of urea ?

119.

What is the modern theory (principle) of heterogeneous catalysis ?

(a)	The theory of formation of intermediate compound.
(b)	The principle of adsorption
(c)	The theory of activated complex
(d)	Both (A) and (B)

120.

What is used for isomerisation in petrochemical industries ?

Showing 111 to 120 out of 203 Questions