Atomic and Molecular Masses NEET Questions

Physical Chemistry - Some Basic Concepts of Chemistry

Atomic and Molecular Masses MCQ Questions


7.
Which of the following has the highest molecular mass?
A.
H₂O
B.
CO₂
C.
CH₄
D.
N₂
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ANSWER :
B. CO₂
8.
What is the molecular mass of methane (CH₄)?
A.
14 amu
B.
22 amu
C.
12 amu
D.
16 amu
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ANSWER :
D. 16 amu
9.
A sample contains 0.5 moles of O₂. What is the total mass of the sample?
A.
8 g
B.
64 g
C.
32 g
D.
16 g
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ANSWER :
D. 16 g
10.
If a molecule contains 2 hydrogen atoms and 1 oxygen atom, what is its molecular mass?
A.
1 amu
B.
19 amu
C.
17 amu
D.
18 amu
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ANSWER :
D. 18 amu
11.
Which of the following statements is true regarding atomic mass?
A.
It is always a whole number
B.
It is equal to the mass number
C.
It is equal to the atomic number
D.
It is the weighted average of isotopes
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ANSWER :
D. It is the weighted average of isotopes
12.
What is the approximate atomic mass of oxygen?
A.
14 u
B.
16 u
C.
18 u
D.
20 u
😑 View Answer Rough Work Error
ANSWER :
B. 16 u