Which among the following true regarding adsorption?
(i) Adsorption is a spontaneous process
(ii) Adsorption is always accompanied by increase in free energy.
(iii) Adsorption is an endothermic process
(iv) Adsorption can occur in all interfacial surfaces.

(a)

only (ii)

(b)

(ii) and (iii)

(c)

only (i)

(d)

(i) and (iv)

Which among the following does not affect adsorption?

(a)

surface area of the adsorbent

(b)

catalyst

(c)

temperature

(d)

pressure

According to Freundlich adsorption isotherm,_______.

(a)

\(\frac { x }{ m } =kp\)

(b)

\(\frac { m }{ x } ={ (kp) }^{ \frac { 1 }{ n } }\)

(c)

\(\frac { x }{ m } ={ kp }^{ \frac { 1 }{ n } }\)

(d)

\(\\ \\ \frac { x }{ m } =\frac { k }{ { p }^{ \frac { 1 }{ n } } } \)

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

Pick the odd one out.

(a)

dialysis

(b)

electro dialysis

(c)

electrophoresis

(d)

ultrafiltration

Adsorption is accompanied by _______.

(a)

decrease in free energy

(b)

increase in free energy

(c)

increase in entropy

(d)

both (b) and (c)

Which of the following interface cannot be obtained?

(a)

solid - solid

(b)

solid - liquid

(c)

gas - gas

(d)

liquid -Iiquid

Which among the following is an example of absorption?

(a)

Water on calcium chloride

(b)

Water on silica gel

(c)

Ammonia gas on charcoal

(d)

Hydrogen on finely divided nickel

Auto catalysis is observed in the reaction given below.
CH₃COOC₂H₅+H₂O➝ CH₃COOH+C₂H₅OH

(a)

CH₃COOC₂H₅

(b)

H₂O

(c)

CH₃COOH

(d)

C₂H₅OH

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)

Fog is a colloidal solution of _______.

(a)

gas in liquid

(b)

liquid in gas

(c)

gas in solid

(d)

solid in gas

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 among the following is not correct with regards to enzyme catalysis?

(a)

The rate of enzyme catalysisvaries with pH.

(b)

Enzyme catalysisis highly specific in nature

(c)

Catalytic activity of enzymes is increased by co-enzymes

(d)

Enzymes cannot be inhibited

Which one of the following is correctly matched?

(a)

Emulsion - Mayonnaise

(b)

Foam - Cream

(c)

Solid aerosol - Fog

(d)

Solid sol - Pumice stone

Which one of the following does not involve coagulation?

(a)

formation of delta

(b)

peptisation

(c)

clotting of blood

(d)

tanning of leather