Mole Concept, Molar Mass NEET Questions

Physical Chemistry - Some Basic Concepts of Chemistry

Mole Concept, Molar Mass MCQ Questions


7.
1 mole of oxygen gas (O₂) contains how many atoms?
A.
6.022 × 10²³
B.
3.011 × 10²³
C.
1.204 × 10²⁴
D.
2.408 × 10²³
😑 View Answer Rough Work Error
ANSWER :
B. 3.011 × 10²³
8.
What is the mass of 0.5 moles of nitrogen gas (N₂)?
A.
14 g
B.
28 g
C.
7 g
D.
21 g
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ANSWER :
B. 28 g
9.
Which of the following represents 1 mole of substance?
A.
22.4 L of any gas at STP
B.
1 g of H₂
C.
1 mole of NaCl
D.
1 mole of CH₄
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ANSWER :
A. 22.4 L of any gas at STP
10.
The number of moles in 88 g of CO₂ is:
A.
1 mol
B.
2 mol
C.
0.5 mol
D.
4 mol
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ANSWER :
A. 1 mol
11.
The molar mass of H₂SO₄ is:
A.
96 g/mol
B.
98 g/mol
C.
100 g/mol
D.
102 g/mol
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ANSWER :
A. 96 g/mol
12.
What is the number of atoms in 0.5 moles of He gas?
A.
3.011 × 10²³
B.
6.022 × 10²³
C.
1.204 × 10²³
D.
4.808 × 10²³
😑 View Answer Rough Work Error
ANSWER :
A. 3.011 × 10²³