For Freundlich isotherm a graph of log \(\frac{x}{m}\) is plotted against log P. The slope of the line and its y – axis intercept respectively corresponds to________.

(a)

\(\frac{1}{n}\), K

(b)

log\(\frac{1}{n}\), K

(c)

\(\frac{1}{n}\), log K

(d)

log \(\frac{1}{n}\), log K

Which one of the following characteristics are associated with adsorption?

(a)

\(\Delta\)G and \(\Delta\)H are negative but \(\Delta\)S is positive

(b)

\(\Delta\)G and \(\Delta\)S are negative but \(\Delta\)H is positive

(c)

\(\Delta\)G is negative but \(\Delta\)H and \(\Delta\)S are positive

(d)

\(\Delta\)G, \(\Delta\)H and \(\Delta\)S all are negative.

Hair cream is _____.

(a)

gel

(b)

emulsion

(c)

solid sol

(d)

sol.

The most effective electrolyte for the coagulation of As₂S₃Sol is _______.

(a)

NaCl

(b)

Ba(NO₃)₂

(c)

K₃[Fe(CN)₆]

(d)

Al₂(SO₄)₃

The phenomenon observed when a beam of light is passed through a colloidal solution is_______.

(a)

Cataphoresis

(b)

Electrophoresis

(c)

Coagulation

(d)

Tyndall effect

Collodion is a 4% solution of which one of the following compounds in alcohol – ether mixture?

(a)

Nitroglycerine

(b)

Cellulose acetate

(c)

Glycoldinitrate

(d)

Nitrocellulose

Adsorption of a gas on solid metal surface is spontaneous and exothermic, then ______.

(a)

ΔH increases

(b)

ΔS increases

(c)

ΔG increases

(d)

ΔS decreases

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)

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 interface cannot be obtained?

(a)

solid - solid

(b)

solid - liquid

(c)

gas - gas

(d)

liquid -Iiquid

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

(a)

CH₃COOC₂H₅

(b)

H₂O

(c)

CH₃COOH

(d)

C₂H₅OH

Fog is a colloidal solution of _______.

(a)

gas in liquid

(b)

liquid in gas

(c)

gas in solid

(d)

solid in gas

Which one of the following does not involve coagulation?

(a)

formation of delta

(b)

peptisation

(c)

clotting of blood

(d)

tanning of leather

The place where rivers meet the sea is the delta region. Which of the following process is responsible for the formation of delta?

(a)

Emulsification

(b)

Peptisation

(c)

Gel formation

(d)

Coagulation

Milk of Magnesia is used as _____.

(a)

Tranquilizer

(b)

Analgesic

(c)

Antacid

(d)

Anaesthetic

Extent of physisorption of a gas increases with_______.

(a)

increase in temperature

(b)

decrease in surface area of adsorbent

(c)

decrease in pressure

(d)

decrease in temperature

Butter and cream are examples of________type of emulsion.

(a)

O/O

(b)

O/W

(c)

W/W

(d)

W/O

The process of hardening of leather is called _______.

(a)

coagulation

(b)

tanning

(c)

centrifuging

(d)

stabilization

The function of FeCl₃ in the conversion of Fe(OH)₃ precipitate into a colloid is_________.

(a)

peptising agent

(b)

emulsifying agent

(c)

reducing agent

(d)

precipitating agent

Silica gel is utilised for the ________of the number of gases.

(a)

adsorption

(b)

absorption

(c)

desorption

(d)

all of these