Basic Concepts in Chemistry (KVPY Stream-SA (Class 11) Chemistry): Questions 1 - 6 of 17

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Question number: 1

» Basic Concepts in Chemistry » Mole Concept

Appeared in Year: 2014

MCQ▾

Question

Complete reaction of 2.0 g of calcium (at. wt. = 40) with excess HCL produces 1.125 L of H2 gas. Complete reaction of the same quantity of another metal “M” with excess HCL produces 1.85 L of H2 gas under identical conditions. The equivalent weight of “M” is closest to

Choices

Choice (4) Response

a.

23

b.

12

c.

9

d.

7

Question number: 2

» Basic Concepts in Chemistry » Concept of Atom, Molecule, Element and Compound

Appeared in Year: 2012

MCQ▾

Question

The number of electrons plus neutrons in 1940K+ is

Choices

Choice (4) Response

a.

40

b.

38

c.

39

d.

59

Question number: 3

» Basic Concepts in Chemistry » Empirical and Molecular Formulae

Appeared in Year: 2014

MCQ▾

Question

In acting as a reducing agent, a piece of metal M weighing 23 grams gives up 4.25×1023 electrons. What is the equivalent weight of the metal?

Choices

Choice (4) Response

a.

36.50

b.

30

c.

82.60

d.

32.60

Question number: 4

» 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: 5

» 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

Question number: 6

» Basic Concepts in Chemistry » Concept of Atom, Molecule, Element and Compound

Appeared in Year: 2015

MCQ▾

Question

If Avogadro’s number is A0, the number of Sulphur atoms present in 200 mL is 1 N H2SO4 is-

Choices

Choice (4) Response

a.

A02

b.

A05

c.

A010

d.

A0

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