AIEEE 2002 | Electrochemistry Question 179 | Chemistry | JEE Main - ExamSIDE.com

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1

AIEEE 2002

MCQ (Single Correct Answer)

+4

-1

For the following cell with hydrogen electrodes at two different pressure p₁ and p₂. What will be the emf for the given cell :

$$\eqalign{ & Pt({H_2})|{H^ + }(aq)|Pt({H_2}) \cr & \,\,\,\,\,{p_1}\,\,\,\,\,\,\,\,\,\,\,\,\,\,1M\,\,\,\,\,\,\,\,\,\,\,\,{p_2} \cr} $$

A

$${{RT} \over F}{\log _e}{{{P_1}} \over {{P_2}}}$$

B

$${{RT} \over 2F}{\log _e}{{{P_1}} \over {{P_2}}}$$

C

$${{RT} \over F}{\log _e}{{{P_2}} \over {{P_1}}}$$

D

none of these

2

AIEEE 2002

MCQ (Single Correct Answer)

+4

-1

EMF of a cell in terms of reduction potential of its left and right electrodes is :

A

E = E_left - E_right

B

E = E_left + E_right

C

E = E_right - E_left

D

E = -(E_right + E_left)

3

AIEEE 2002

MCQ (Single Correct Answer)

+4

-1

Which of the following reaction is possible at anode?

A

2Cr³⁺ + 7H₂O $$\to Cr_2O_7^{2-}$$ + 14H⁺

B

F₂ $$\to$$ 2F^-

C

(1/2) O₂ + 2H⁺ $$\to$$ H₂O

D

none of these

4

AIEEE 2002

MCQ (Single Correct Answer)

+4

-1

When the sample of copper with zinc impurity is to be purified by electrolysis, the appropriate electrodes are :

A

cathode = pure zinc, anode = pure copper

B

cathode = impure sample, anode = pure copper

C

cathode = impure zinc, anode = impure sample

D

cathode = pure copper, anode = impure sample

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