KVPY Stream SB-SX (Class 12 & 1st Year B.Sc.) Chemistry: Questions 5 - 8 of 269

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Question number: 5

» Redox Reactions & Electrochemistry » Specific and Molar Conductivities

Appeared in Year: 2015

MCQ▾

Question

The molar conductivities of HCl,NaCl,CH3COOHandCH3COONa at infinite dilution follow the order-

Choices

Choice (4) Response

a.

HCl>NaCl>CH3COOH>CH3COONa

b.

CH3COONa>HCl>NaCl>CH3COOH

c.

CH3COOH>CH3COONa>HCl>NaCl

d.

HCl>CH3COOH>NaCl>CH3COONa

Question number: 6

» P-Block Elements Group 13 to 18 » Group 13 » Boron

Appeared in Year: 2013

MCQ▾

Question

In the structure of borax, the number of boron atoms and B-O-B units, respectively are

Choices

Choice (4) Response

a.

4 and 3

b.

5 and 4

c.

5 and 3

d.

4 and 5

Question number: 7

» 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: 8

» Chemical Thermodynamics » Second Law of Thermodynamics

Appeared in Year: 2014

MCQ▾

Question

The latent heat melting of ice at 0°C is 6KJmol1 the entropy change during the melting in JK1mol1 is closest to

Choices

Choice (4) Response

a.

11

b.

- 22

c.

22

d.

- 11

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