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 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

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.

Fog is colloidal solution of _______.

(a)

solid in gas

(b)

gas in gas

(c)

liquid in gas

(d)

gas in liquid

Assertion: Coagulation power of Al³⁺ is more than Na⁺.
Reason: greater the valency of the flocculating ion added, greater is its power to cause precipitation.
Codes:
a) if both assertion and reason are true and reason is the correct explanation of assertion.
b) if both assertion and reason are true but reason is not the correct explanation of assertion
c) assertion is true but reason is false
d) both assertion and reason are false

(a)

if both assertion and reason are true and reason is the correct explanation of assertion.

(b)

if both assertion and reason are true but reason is not the correct explanation of assertion

(c)

assertion is true but reason is false

(d)

both assertion and reason are false

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^-.

Hair cream is _____.

(a)

gel

(b)

emulsion

(c)

solid sol

(d)

sol.

Which one of the following is correctly matched?

(a)

Emulsion - Smoke

(b)

Gel - butter

(c)

foam - Mist

(d)

whipped cream - 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

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⁺

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

(a)

Cataphoresis

(b)

Electrophoresis

(c)

Coagulation

(d)

Tyndall effect

In an electrical field, the particles of a colloidal system move towards cathode. The coagulation of the same sol is studied using K₂SO₄
(i), Na₃ PO₄
(ii), K₄ [Fe(CN)₆]
(iii) and NaCl
(iv) Their coagulating power should be

(a)

II > I > IV > III

(b)

III > II > I > IV

(c)

I > II > III > IV

(d)

none of these

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

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

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

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

If x is the amount of adsorb ate and m is the amount of adsorbent, which of the following relations is not related to adsorption process?

(a)

x/m = f(P) at constant T

(b)

x/m = f(T) at constant P

(c)

P = f(T) at constant x/m

(d)

x/m = PT

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.

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