Which one of the following is an example for homogeneous catalysis?

(a)

manufacture of ammonia by Haber’s process

(b)

manufacture of sulphuric acid by contact process

(c)

hydrogenation of oil

(d)

Hydrolysis of sucrose in presence of all HCl

Match the following

a	V2O5	i	High density polyethylene
b	Ziegler – Natta	ii	PAN
c	Peroxide	iii	NH3
d	Finely divided Fe	iv	H2SO4

(a)

A	B	C	D
iv	i	ii	iii

(b)

A	B	C	D
i	ii	iv	iii

(c)

A	B	C	D
ii	iii	iv	i

(d)

A	B	C	D
iii	iv	ii	i

On which of the following properties does the coagulating power of an ion depend?

(a)

Both magnitude and sign of the charge on the ion.

(b)

Size of the ion alone

(c)

the magnitude of the charge on the ion alone

(d)

the sign of charge on the ion alone.

Which among the following does not affect adsorption?

(a)

surface area of the adsorbent

(b)

catalyst

(c)

temperature

(d)

pressure

Pick the odd one out.

(a)

dialysis

(b)

electro dialysis

(c)

electrophoresis

(d)

ultrafiltration

Which among the following reactions is an example of auto catalysis?
i) CH₃COOC₂H₅+H₂O➝ CH₃COOH+C₂H₅OH
ii) 2H₂O➝2H₂O+O₂
iii) 2SO₂+O₂➝2SO₃
iv) 2AsH₃➝2As+3H₂

(a)

only (i)

(b)

(i) and (ii)

(c)

(i) and (ii)

(d)

(i) and (iv)

Colloids are purified by _______.

(a)

precipitation

(b)

coagulation

(c)

dialysis

(d)

filtration

When the operation force between the absorbent and adsorbate is weak Vander waal's force, then it is called _______.

(a)

physical adsorption

(b)

chemical adsorption

(c)

Vander waal's adsorption

(d)

both (a) and (c)

Pick out the dispersion method of preparation of colloids.

(a)

oxidation

(b)

change of physical state

(c)

reduction

(d)

peptisation

Brownian movement of colloidal particles is a ______ property.

(a)

Kinetic

(b)

Electrical

(c)

Optical

(d)

Magnetic

When the surface area of the adsorbent increases, adsorption________.

(a)

increases

(b)

decreases

(c)

remains constant

(d)

first decreases and then increases

In auto catalysis _________ acts as catalyst.

(a)

reactant

(b)

production

(c)

both

(d)

none

The platinum catalyst used in the oxidation of SO₂ by contact process is poisoned by _______.

(a)

As₂O₃

(b)

V₂O₅

(c)

Fe₂O₃

(d)

CuCl₂

Emulsifying agent is used for________.

(a)

precipitation of an emulsion

(b)

coagulation of an emulsion

(c)

stabilization of an emulsion

(d)

none of these

Argyrol is_______.

(a)

colloidal silver

(b)

colloidal antimony

(c)

colloidal gold

(d)

milk of magnesia

Which will be adsorbed more readily on the surface of charcoal and why? NH₃ or CO₂?

Define adsorption isotherm.

What are limitations of Freundlich adsorption isotherm?

What is ultrasonic dispersion?

Write a note on dialysis.

What are the two types of catalysis?

Explain the kinetic property of colloids.

Which will adsorb more gas, a lump of charcoal or its powder and why?

Adsorption of a gas on the surface of solid is generally accompanied by decrease in entropy. Still it is a spontaneous process. Explain.

Why the sun looks red at the time of setting? Explain on the basis of colloidal properties.

What happens when a colloidal sol of Fe(OH)₃ and As₂S₃ are mixed?

What are the factors which influence the adsorption of a gas on a solid?

Give any three application of adsorption.

What are the important concepts of catalysis that adsorption theory explains?

Write a note on Ultrafilteration?

What are the advantages of Brownian movement?

What are the tests used to identify the type of emulsion?

Write the optical properties of colloids with diagram.

For the coagulation of 100 ml of arsenious sulphide sol, 5 ml of 1 M NaCI is required. What is the flocculation value of NaCl?

Explain the meaning of the statement. 'Adsorption is a surface phenomenon'.

Describe adsorption theory of catalysis

Explain the factors affecting adsorption.

Write a note on Freundlich adsorption isotherm.

Give the special characteristics of enzyme catalysed reactions.

Write a note on phase transfer catalysis.

Explain electrodialysis

Explain the electrical property of colloids with a neat diagram. (or) Write a note on Helmholta electrical double layer.