Mole Concept, Molar Mass NEET Questions

Physical Chemistry - Some Basic Concepts of Chemistry

Mole Concept, Molar Mass MCQ Questions


13.
The mass of 2 moles of glucose (C₆H₁₂O₆) is:
A.
240 g
B.
360 g
C.
180 g
D.
540 g
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ANSWER :
B. 360 g
14.
0.1 mol of MgCO₃ has mass: (Molar mass MgCO₃ = 84 g/mol)
A.
84 g
B.
16.8 g
C.
168 g
D.
8.4 g
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ANSWER :
D. 8.4 g
15.
How many moles are present in 80 g of NaOH? (NaOH = 40 g/mol)
A.
1.0
B.
2.0
C.
0.5
D.
4.0
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ANSWER :
B. 2.0
16.
The number of molecules in 1 mole of any gas is:
A.
Depends on pressure
B.
Different for different gases
C.
Depends on temperature
D.
Same for all gases — 6.022 × 10²³
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ANSWER :
D. Same for all gases — 6.022 × 10²³
17.
The number of molecules in 4.4 g of CO₂ is: (Molar mass CO₂ = 44 g/mol; NA = 6.022 × 10²³)
A.
6.022 × 10²²
B.
1.806 × 10²³
C.
6.022 × 10²³
D.
1.806 × 10²²
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ANSWER :
A. 6.022 × 10²²
18.
The number of atoms in 16 g of methane (CH₄) is: (Molar mass CH₄ = 16 g/mol)
A.
1.205 × 10²⁴
B.
6.022 × 10²³
C.
3.011 × 10²⁴
D.
5 × 6.022 × 10²³
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ANSWER :
D. 5 × 6.022 × 10²³