Basic Concepts in Chemistry (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Chemistry): Questions 5 - 10 of 91

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Question number: 5

» Basic Concepts in Chemistry » Empirical and Molecular Formulae

MCQ▾

Question

What weight of (mol. wt. =126) should be dissolved to prepare 250 ml of semi normal to be used as a reducing agent?

Choices

Choice (4) Response

a.

0.1575 gm

b.

0.63 gm

c.

0.875 gm

d.

0.126 gm

Question number: 6

» Basic Concepts in Chemistry » Empirical and Molecular Formulae

MCQ▾

Question

In acting as a reducing agent, a piece of metal M weighing 20 grams gives up electrons. What is the equivalent weight of the metal?

Choices

Choice (4) Response

a.

36.50

b.

83.32

c.

32

d.

42.83

Question number: 7

» Basic Concepts in Chemistry » Empirical and Molecular Formulae

MCQ▾

Question

The equivalent wt. of a metal is double that of oxygen. How many times is weight of its oxide greater than the wt. of metal?

Choices

Choice (4) Response

a.

1.5

b.

0.25

c.

3

d.

2

Question number: 8

» Basic Concepts in Chemistry » Empirical and Molecular Formulae

MCQ▾

Question

10 ml of (N/2) , 30 ml of () and 75 ml of () are mixed; the normality of in the resulting solution is-

Choices

Choice (4) Response

a.

0.2

b.

0.25

c.

0.5

d.

0.1

Question number: 9

» Basic Concepts in Chemistry » Mole Concept

Assertion-Reason▾

Question

Assertion (Ꭺ)

Equivalent weight of in is 31.8 and in is 63.6.

Reason (Ꭱ)

Equivalent weight of an element

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

b.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

c.

Ꭺ is true but Ꭱ is false

d.

Ꭺ is false but Ꭱ is true

Question number: 10

» Basic Concepts in Chemistry » Mole Concept

Assertion-Reason▾

Question

Assertion (Ꭺ)

As mole is the basic chemical unit, the concentration of the dissolved solute is usually specified in terms of number of moles of solute.

Reason (Ꭱ)

The total number of molecules of reactants involved in a balanced chemical equation is known as molecularity of the reaction.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

b.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

c.

Both Ꭺ and Ꭱ are false

d.

Ꭺ is true but Ꭱ is false

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