Mole Concept, Molar Mass NEET Questions

Physical Chemistry - Some Basic Concepts of Chemistry

Mole Concept, Molar Mass MCQ Questions


1.
What is the number of moles in 36 g of water (H₂O)?
A.
1 mol
B.
2 mol
C.
0.5 mol
D.
3 mol
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ANSWER :
A. 1 mol
2.
How many molecules are present in 2 moles of CO₂?
A.
3.011 × 10²³
B.
6.022 × 10²³
C.
1.204 × 10²⁴
D.
2.408 × 10²⁴
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ANSWER :
A. 3.011 × 10²³
3.
The molar mass of Na₂CO₃ is:
A.
102 g/mol
B.
106 g/mol
C.
120 g/mol
D.
150 g/mol
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ANSWER :
A. 102 g/mol
4.
How many atoms are present in 1 mole of methane (CH₄)?
A.
6.022 × 10²³
B.
3.011 × 10²³
C.
2.408 × 10²³
D.
1.806 × 10²³
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ANSWER :
B. 3.011 × 10²³
5.
The number of molecules in 22.4 L of any ideal gas at STP is:
A.
6.022 × 10²³
B.
3.011 × 10²³
C.
1.204 × 10²⁴
D.
2.408 × 10²³
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ANSWER :
B. 3.011 × 10²³
6.
Which of the following has the highest molar mass?
A.
CO₂
B.
H₂O
C.
N₂
D.
NaCl
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ANSWER :
B. H₂O