Which of the following is incorrect for physisorption?

(a)

reversible

(b)

increases with increase in temperature

(c)

low heat of adsorption

(d)

increases with increase in surface area

Fog is colloidal solution of _______.

(a)

solid in gas

(b)

gas in gas

(c)

liquid in gas

(d)

gas in liquid

Statement : To stop bleeding from an injury, ferric chloride can be applied. Which comment about the statement is justified?

(a)

It is not true, ferric chloride is a poison.

(b)

It is true, Fe³⁺ ions coagulate blood which is a negatively charged sol

(c)

It is not true; ferric chloride is ionic and gets into the blood stream.

(d)

It is true, coagulation takes place because of formation of negatively charged sol with Cl^-.

Which one of the is not a surfactant?

(a)

CH₃ -(CH₂)₁₅ -N⁺ -(CH₃)₂ CH₂Br

(b)

CH₃ -(CH₂)₁₅ -NH₂

(c)

CH₃ -(- CH₂- )-₁₆CH₂ OSO₂^- Na⁺

(d)

OHC-(CH₂)₁₄ -CH₂ -COO^- Na⁺

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

The coagulation values in millimoles per litre of the electrolytes used for the coagulation of As₂S₃ are given below
(I) (NaCl) = 52
(II) ((BaCl₂) = 0.69
(III) (MgSO₄) = 0.22
The correct order of their coagulating power is ________.

(a)

III > II > I

(b)

I > II > III

(c)

I > III > II

(d)

II > III > I

Match the following

a	Pure nitrogen	i	Chlorine
b	Haber process	ii	Sulphuric acid
c	Contact process	iii	Ammonia
d	Deacons Process	iv	Sodium azide (or) Barium azide

Which of the following is the correct option?

(a)

A	B	C	D
i	ii	iii	iv

(b)

A	B	C	D
ii	iv	i	iii

(c)

A	B	C	D
iii	iv	ii	i

(d)

A	B	C	D
iv	iii	ii	i

Which among the following does not affect adsorption?

(a)

surface area of the adsorbent

(b)

catalyst

(c)

temperature

(d)

pressure

Which of the following is true regarding Freundlich adsorption isotherm equation?

(a)

Purely empirical

(b)

Valid only over a limited pressure range

(c)

The value of constants k and n varies with temperature

(d)

All the above

Adsorption is accompanied by _______.

(a)

decrease in free energy

(b)

increase in free energy

(c)

increase in entropy

(d)

both (b) and (c)

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)

The intermediate compound formation theory does not explain _______.

(a)

action of catalytic poison

(b)

specificity of a catalyst

(c)

the mechanism of heterogeneous catalysed reactions

(d)

both (a) and (c)

Which one of the following is correctly matched?

(a)

Emulsion - Mayonnaise

(b)

Foam - Cream

(c)

Solid aerosol - Fog

(d)

Solid sol - Pumice stone

Which among the following is/are solid aerosol?
(i) Dust
(ii) Fog
(iii) Aerosol spray
(iv) Air

(a)

(i) and (iv)

(b)

(iii) and (iv)

(c)

(i) and (iii)

(d)

only (iii)

The phenomenon of Tyndall's effect is not observed in _______.

(a)

emulsion

(b)

colloidal solution

(c)

true solution

(d)

none

Colloidal medicines are more efffective because _______.

(a)

they are clean

(b)

they are easy to prepare

(c)

the germs move towards them

(d)

they are easily assimilated and adsorbed

Oil soluble dye is mixed with emulsion and emulsion remains colourless then, the emulsion is _______.

(a)

O/W

(b)

W/O

(c)

O/O

(d)

W/W

This adsorption is irreversible _______.

(a)

Vanderwaal's adsorption

(b)

Physical adsorption

(c)

Chemical adsorption

(d)

All the above

Dispersed Phase	Dispersion Medium	Name
Liquid	X	Liquid Aerosol
Y	Solid	Solid form

The X and Y are ______ and _____.

(a)

Gas, Liquid

(b)

Gas, Solid

(c)

Gas, Gas

(d)

Solid, Gas

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)