Calculations of Empirical Formulae and Molecular Formulae NEET Questions

Organic Chemistry - Purification and Characterization of Organic Compounds

Calculations of Empirical Formulae and Molecular Formulae MCQ Questions


13.
A compound contains 38.71% C, 9.67% H, and 51.62% O. Its empirical formula is:
A.
CH3O
B.
C2H6O2
C.
C2H6O
D.
CH4O
😑 View Answer Rough Work Error
ANSWER :
A. CH3O
14.
The empirical formula of a compound is CH2O and its molecular mass is 180 g/mol. The molecular formula is:
A.
CH2O
B.
C3H6O3
C.
C6H12O6
D.
C2H4O2
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ANSWER :
C. C6H12O6
15.
An organic compound has empirical formula CH2 and vapour density 21. Its molecular formula is:
A.
C4H8
B.
C3H6
C.
C2H4
D.
CH2
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ANSWER :
B. C3H6
16.
A hydrocarbon has empirical formula CH and molecular mass 78. Its molecular formula is:
A.
C4H4
B.
C3H3
C.
C2H2
D.
C6H6
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ANSWER :
D. C6H6
17.
A compound has empirical formula CH2O. If its vapour density is 30, the molecular formula is:
A.
C2H4O2
B.
CH2O
C.
C3H6O3
D.
C6H12O6
😑 View Answer Rough Work Error
ANSWER :
A. C2H4O2
18.
If empirical formula is CH and vapour density is 13, molecular formula is:
A.
CH
B.
C6H6
C.
C2H2
D.
C3H3
😑 View Answer Rough Work Error
ANSWER :
C. C2H2