KVPY (Kishore Vaigyanik Protsahan Yojana) Stream-SA (Class 11) Chemistry: Questions 21 - 24 of 133

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Question number: 21

» Basic Concepts in Chemistry » Mole Concept

Appeared in Year: 2014

MCQ▾

Question

The volume of oxygen at STP required to burn 2.4 g of carbon completely is

Choices

Choice (4) Response

a.

8.96 L

b.

2.24 L

c.

1.12 L

d.

4.48 L

Question number: 22

» Atomic Structure » Bohr Model of Hydrogen Atom

MCQ▾

Question

According to Bohr’s theory, the electronic energy of the hydrogen atom in nth Bohr’s orbit given by . Calculate the longest wavelength of light that will be needed to remove electrons from 3rd Bohr orbit of ion.

Choices

Choice (4) Response

a.

b.

2.76×10 - 18J

c.

d.

Question number: 23

» States of Matter » Gaseous State » Ideal Gas Equation

Appeared in Year: 2011

MCQ▾

Question

An isolated box, equally partitioned contains two ideal gases A and B as shown

An isolated box containing two ideal gases

An Isolated Box Containing Two Ideal Gases

Find the change in enthalpy and entropy when partition removed

When the partition removed, the gases mix. The changes in enthalpy (∆H) and entropy (∆S) in the process, respectively, are

Choices

Choice (4) Response

a.

negative, zero

b.

zero, negative

c.

zero, positive

d.

positive, zero

Question number: 24

» Basic Concepts in Chemistry » Mole Concept

Appeared in Year: 2014

MCQ▾

Question

Zinc sulphate contains 22.65 % of zinc and 43.9 % of water of crystallization, if the law of constant proportions is true, then the weight of zinc required to produce 20 g of the crystals will be

Choices

Choice (4) Response

a.

4.53 g

b.

0.453 g

c.

453 g

d.

45.3 g

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