Percentage Composition, Empirical and Molecular Formulae NEET Questions

Physical Chemistry - Some Basic Concepts of Chemistry

Percentage Composition, Empirical and Molecular Formulae MCQ Questions


7.
If the empirical formula of a compound is CH and its molecular weight is 78 g/mol, what is the molecular formula?
A.
C₆H₆
B.
C₂H₂
C.
C₄H₄
D.
C₈H₈
😑 View Answer Rough Work Error
ANSWER :
A. C₆H₆
8.
Which of the following has the highest percentage of oxygen?
A.
CO₂
B.
H₂O₂
C.
H₂SO₄
D.
MgO
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ANSWER :
B. H₂O₂
9.
A compound has an empirical formula of CH₂ and a molar mass of 56 g/mol. What is its molecular formula?
A.
C₄H₈
B.
C₂H₄
C.
C₆H₁₂
D.
C₈H₁₆
😑 View Answer Rough Work Error
ANSWER :
B. C₂H₄
10.
What is the molecular formula of a compound with an empirical formula CH₂O and molecular weight of 90 g/mol?
A.
C₃H₆O₃
B.
C₂H₄O₂
C.
C₅H₁₀O₅
D.
C₄H₈O₄
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ANSWER :
C. C₅H₁₀O₅
11.
If the empirical formula of a compound is C₂H₅ and its molecular weight is 58 g/mol, what is the molecular formula?
A.
C₂H₅
B.
C₄H₁₀
C.
C₆H₁₂
D.
C₈H₁₆
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ANSWER :
C. C₆H₁₂
12.
A compound has a molecular weight of 98 g/mol and an empirical formula of H₂SO₄. What is its molecular formula?
A.
H₂SO₄
B.
H₂S₂O₈
C.
H₄S₂O₈
D.
H₂SO₄
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ANSWER :
A. H₂SO₄