Match the following: Group-A Group-B (i) Corrosion (a) Lanthanides (ii) Gold sol (b) Used in treatment of cancer (iii) Radon (c) Purple of cassius (iv) f-block elements (d) Barbituric acid (v) Tranquilizers (e) Hydrated ferric oxide.

(i)-(e), (ii)-(c), (iii)-(b), (iv)-(a), (v)-(d)

(i)-(d), (ii)-(c), (iii)-(b), (iv)-(a), (v)-(e)

(i)-(e), (ii)-(b), (iii)-(c), (iv)-(a), (v)-(d)

(i)-(e), (ii)-(a), (iii)-(b), (iv)-(c), (v)-(d)

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Stainless steel does not rust because

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Important Questions on Electrochemistry

HARD

Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention

Define corrosion. Write two preventions from corrosion.

HARD

Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention

Iron gets rust, but Gold doesn’t, why?

MEDIUM

Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention

Rusting of iron is said to be an electrochemical phenomenon. Give reason for this.

EASY

Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention

State Kohlrausch law.

HARD

Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention

To protect iron against corrosion the most durable metal plating on it is?

HARD

Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention

The equation that is incorrect is:

EASY

Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention

What is sacrificial protection?

MEDIUM

Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention

λ ° m

for

{NH}_{4} Cl, NaOH

and

NaCl

are

130, 248

and

126 . 5

{ohm}^{- 1} {em}^{2} {mo}^{- 1}

respectively. The

λ ° m

{NH}_{4} OH

will be,

MEDIUM

Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention

Out of zinc and tin, whose coating is better to protect iron objects?

EASY

Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention

Write two conditions necessary for the corrosion to occur.

EASY

Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention

Identify the correct statement:

EASY

Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention

Blocks of magnesium are fixed to the bottom of a ship to

MEDIUM

Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention

Why can limiting molar conductivity of

{CH}_{3} COOH

not be determined experimentally ?

HARD

Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention

\land_{m}^{o}

for

NaCl, HCl

and

NaA

are

126.4, 425.9

and

100 .5 S {cm}^{2} {mol}^{- 1}

respectively. If the conductivity of

0 .001 M HA

5 \times 10^{- 5} S {cm}^{- 1}

, degree of dissociation of

HA

MEDIUM

Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention

0.002 M

solution of a weak acid has an equivalent conductance

(Λ) 60 {ohm}^{- 1} {cm}^{2}

{eq}^{- 1}

. What will be the

pH

? (Given :

Λ ° = 400 {ohm}^{- 1} {cm}^{2} {eq}^{- 1}

]

EASY

Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention

Which one is correct for acetic acid?

HARD

Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention

State and explain kohlrausch's law of independent migration of ions.

HARD

Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention

Define the term: Corrosion
Write two applications of electrochernical series.

HARD

Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention

Match the following:

Group-A	Group-B
(i) Corrosion	(a) Lanthanides
(ii) Gold sol	(b) Used in treatment of cancer
(iii) Radon	(c) Purple of cassius
(iv) f-block elements	(d) Barbituric acid
(v) Tranquilizers	(e) Hydrated ferric oxide.

EASY

Chemistry>Physical Chemistry>Electrochemistry>Corrosion and its Prevention

Galvanization is applying a coating of:

Stainless steel does not rust because

Important Questions on Electrochemistry

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