Basic Concepts in Chemistry-Mole Concept (NEET Chemistry): Questions 5 - 10 of 18

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Question number: 5

» Basic Concepts in Chemistry » Mole Concept

MCQ▾

Question

What weight of HNO3 is needed to convert 62 gm of P4 in H3PO4 in the reaction?

P4+3HNO3H3PO4+NO2+H2O

Choices

Choice (4) Response

a.

126 gm

b.

315 gm

c.

63 gm

d.

630 gm

Question number: 6

» Basic Concepts in Chemistry » Mole Concept

MCQ▾

Question

which of the following has the highest normality? (Consider each of the acid is 100 % ionized. )

Choices

Choice (4) Response

a.

1(M)H2SO4

b.

1 MPO3

c.

1(M)H3PO4

d.

1(M)HNO3

Question number: 7

» Basic Concepts in Chemistry » Mole Concept

MCQ▾

Question

How many significant figures are in each of the following numbers?

(1) 4.003 (2) 6.023×1023 (3) 5000

Choices

Choice (4) Response

a.

4, 4, 4

b.

3, 4, 3

c.

4, 3, 2

d.

3, 4, 1

Question number: 8

» Basic Concepts in Chemistry » Mole Concept

MCQ▾

Question

26.8gmofNa2SO4nH2O Contains 12.6gm of water. The value of ‘n’ is?

Choices

Choice (4) Response

a.

7

b.

6

c.

10

d.

1

Question number: 9

» Basic Concepts in Chemistry » Mole Concept

MCQ▾

Question

If 1021 Molecules are removed from 100mgCO2, then number of moles of CO2 left are?

Choices

Choice (4) Response

a.

1.36×102

b.

2.28×103

c.

6.10×104

d.

2.8×103

Question number: 10

» Basic Concepts in Chemistry » Mole Concept

MCQ▾

Question

When 1 L of CO2 is heated with graphite, the volume of the gas collected is 1.5L . Calculate the number of moles of CO produced at STP?

Choices

Choice (4) Response

a.

111.2

b.

2822.4

c.

122.4

d.

1422.4

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