KVPY Stream SB-SX (Class 12 & 1st Year B.Sc.) Chemistry: Questions 24 - 29 of 269

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Question number: 24

» Chemical Thermodynamics » First Law of Thermodynamics » Heat Internal Energy

Appeared in Year: 2013

MCQ▾

Question

For the isothermal reversible explanation of an ideal gap:

Choices

Choice (4) Response

a.

H=0andU>0

b.

H>0andU=0

c.

H=0andU=0

d.

H>0andU<0

Question number: 25

» Classification of Elements & Periodicity » Ionization Enthalpy

Appeared in Year: 2015

MCQ▾

Question

The electronic configuration of an element with the largest difference between the 1st&2nd ionization energies is-

Choices

Choice (4) Response

a.

1s22s22p6

b.

1s22s22p63s1

c.

1s22s22p63s2

d.

1s22s22p1

Question number: 26

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

Appeared in Year: 2013

MCQ▾

Question

The Number of lone pair (s) on Xe in XeF2 an XeF4 are, respectively

Choices

Choice (4) Response

a.

4 and 2

b.

2 and 3

c.

4 and 1

d.

3 and 2

Question number: 27

» Principles of Organic Chemistry » Stereochemistry » Optical Activity

Appeared in Year: 2015

MCQ▾

Question

Which of the following molecules can exhibit optical activity?

Choices

Choice (4) Response

a.

1-bromopropane

b.

2-bromobutane

c.

3-bromopentane

d.

Bromocyclohexane

Question number: 28

» Chemical Bonding » Covalent Bonding » Valence Bond Theory

Appeared in Year: 2014

MCQ▾

Question

Two elements X and Y have atomic numbers 33 and 17 respectively the molecular formula of a stable compound formed between them is:

Choices

Choice (4) Response

a.

XY2

b.

XY3

c.

XY

d.

XY4

Question number: 29

» Equilibrium » Le Chatelier's Principle

Appeared in Year: 2014

MCQ▾

Question

The equilibrium constant Kc of the reaction 2AB+C is 0.5at25°C and 1atm . The reaction will proceed in the backward direction when concentrations [A], [B] and [C] are, respectively

Choices

Choice (4) Response

a.

103,102and102M

b.

101,102and102M

c.

102,102and103M

d.

102,103and103M

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