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


1.
The empirical formula of a compound represents:
A.
The structure of the compound
B.
The molecular weight of the compound
C.
The actual number of atoms of each element in a molecule
D.
The simplest whole number ratio of atoms of different elements present in a compound
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ANSWER :
D. The simplest whole number ratio of atoms of different elements present in a compound
2.
The molecular formula of a compound is related to its empirical formula by:
A.
Molecular formula = n × Empirical formula, where n is a whole number
B.
Molecular formula = n + Empirical formula
C.
Molecular formula = Empirical formula / n
D.
Molecular formula = Empirical formula × molar mass
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ANSWER :
A. Molecular formula = n × Empirical formula, where n is a whole number
3.
The empirical formula of glucose (C6H12O6) is:
A.
C3H6O3
B.
C2H4O2
C.
CH2O
D.
C6H12O6
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ANSWER :
C. CH2O
4.
The empirical formula of benzene (C6H6) is:
A.
C6H6
B.
CH
C.
C3H3
D.
C2H2
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ANSWER :
B. CH
5.
The empirical formula of hydrogen peroxide (H2O2) is:
A.
H2O
B.
HO
C.
OH2
D.
H2O2
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ANSWER :
B. HO
6.
Two compounds may have the same:
A.
Number of atoms but different elements
B.
Both empirical and molecular formulas always
C.
Empirical formula but different molecular formulas
D.
Molecular formula but different empirical formulas
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ANSWER :
C. Empirical formula but different molecular formulas