Redox Reactions & Electrochemistry-Electrode Potentials (KVPY Stream SB-SX (Class 12 & 1st Year B.Sc.) Chemistry): Questions 1 - 4 of 6

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Question number: 1

» Redox Reactions & Electrochemistry » Electrode Potentials

Appeared in Year: 2015

MCQ▾

Question

The standard reduction potentials (in v) of a few metal ion/metal electrodes are given below.

Cr3Cr=0.74;Cu2Cu=+0.34;Pb2Pb=0.13;AgAg=+0.8 . The reducing strength of the metals follows the order.

Choices

Choice (4) Response

a.

Cr>Pb>Cu>Ag

b.

Pb>Cr>Ag>Cu

c.

Ag>Cu>Pb>Cr

d.

Cr>Ag>Cu>Pb

Question number: 2

» Redox Reactions & Electrochemistry » Electrode Potentials

MCQ▾

Question

Which is the most electropositive metal on the given changes –

Fe2++2eFe;E°=0.44V

Co2++2eCo;E°=0.28V

Ca2+Ca;E°=2.87V

Cu2++2eCu;E°=+0.2337V

Choices

Choice (4) Response

a.

Fe

b.

Ca

c.

Cu

d.

Co

Question number: 3

» Redox Reactions & Electrochemistry » Electrode Potentials

MCQ▾

Question

The standard reduction potentials of the Fe3+/Fe2+ and Fe2+/Fe couples are 0.77 and –0.44 V respectively. The standard reduction potential (in V) for the Fe3+/Fe couple is

Choices

Choice (4) Response

a.

0.036V

b.

0.36V

c.

0.036V

d.

36V

Question number: 4

» Redox Reactions & Electrochemistry » Electrode Potentials

MCQ▾

Question

Calculate the E° of the half cell Fe3+/Fe .

Given that E°Fe3+/Fe2+=a&E°Fe2+/Fe=b

Choices

Choice (4) Response

a.

(2a + b) /3

b.

(a + 3b) /3

c.

(a + b) /3

d.

(a + 2b) /3

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