Atomic and Molecular Masses NEET Questions

Physical Chemistry - Some Basic Concepts of Chemistry

Atomic and Molecular Masses MCQ Questions


13.
Which among the following has the highest atomic mass?
A.
Calcium
B.
Potassium
C.
Iron
D.
Sulfur
😑 View Answer Rough Work Error
ANSWER :
C. Iron
14.
The molecular mass of ammonia (NH₃) is approximately:
A.
16 amu
B.
17 amu
C.
14 amu
D.
17 amu
😑 View Answer Rough Work Error
ANSWER :
B. 17 amu
15.
How many oxygen atoms are present in 88 g of COâ‚‚?
A.
6.022 × 10²³
B.
12.044 × 10²³
C.
18.066 × 10²³
D.
24.088 × 10²³
😑 View Answer Rough Work Error
ANSWER :
B. 12.044 × 10²³
16.
The molecular mass of NaCl is closest to:
A.
58.5 u
B.
60 u
C.
50 u
D.
80 u
😑 View Answer Rough Work Error
ANSWER :
A. 58.5 u
17.
Which of the following molecules has the highest molecular mass?
A.
Nâ‚‚
B.
Oâ‚‚
C.
COâ‚‚
D.
SOâ‚‚
😑 View Answer Rough Work Error
ANSWER :
D. SOâ‚‚
18.
The atomic mass of hydrogen is 1.008 u. Why is it not exactly 1?
A.
Due to different isotopes
B.
Due to atomic number variation
C.
Due to proton number variation
D.
Due to electron number variation
😑 View Answer Rough Work Error
ANSWER :
A. Due to different isotopes