21. O/N 2016/P12/Q38
Which statement about isomers of a compound is always correct?
A They have different empirical formulae.
B They have different relative molecular masses.
C They have only carbon and hydrogen in their molecules.
D They have the same molecular formula
Answer: D
Explaination
Isomers are those compounds that have same molecular formula (same number of atoms) but different structural formula.
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