Basic Concepts in Chemistry (NEET Chemistry): Questions 16 - 19 of 91

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Question number: 16

» Basic Concepts in Chemistry » Empirical and Molecular Formulae

MCQ▾

Question

In acting as a reducing agent, a piece of metal M weighing 16 grams gives up 2.25×1023 electrons. What is the equivalent weight of the metal?

Choices

Choice (4) Response

a.

42.83

b.

32

c.

83.32

d.

21.33

Question number: 17

» Basic Concepts in Chemistry » Molar Mass

MCQ▾

Question

for a reaction:

H3PO3+Ba(OH)2- > BaHPO3+2H2O

The correct statements is/are

(1) The equivalent mass of H3PO3 is 41.

(2) BaHPO3 is the acid salt

(3) BaHPO3 is normal salt

(4) 1 mole of H3PO3 is completely neutralized by 1.5 moles of Ba(OH)2

Select the correct answers and mark it according to the following codes:

Choices

Choice (4) Response

a.

1 and 2 are correct

b.

2 and 4 are correct

c.

1, 2 and 3 are correct

d.

1 and 3 are correct

Question number: 18

» Basic Concepts in Chemistry » Mole Concept

MCQ▾

Question

In the final answer of the expression (29.220.2)(1.79×105)1.37 . The number of significant figures is

Choices

Choice (4) Response

a.

1

b.

2

c.

3

d.

4

Question number: 19

» Basic Concepts in Chemistry » Molar Mass

MCQ▾

Question

Choose the correct statements -

(1) Double decomposition method is based on the law of equivalent.

(2) For a reaction, PmQn+RoSp → products

If amount of PmQn reacted = W1 gm and amount of RoSp reacted = W2 gm then

w1w2 = EquivalentwtofRoSpEquivalentwtofPmQn

(3) For a reaction PmQn+RoSp → products

If amount of PmQn reacted = W1 gm and amount of RoSp reacted = W2 gm then

w1w2 = EquivalentwtofPmQnEquivalentwtofRoSp

(4) 1 equivalent of oxygen = 16 gm

Select the correct answers and mark it according to the following codes:

Choices

Choice (4) Response

a.

1, 2 and 3 are correct

b.

1 and 2 are correct

c.

1 and 3 are correct

d.

2 and 4 are correct

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