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Question
Define isomerism.
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Solution
Isomerism: Compounds having the same molecular formula but different structural formulae are known as isomers, and the phenomenon is known as isomerism.
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\[\begin{array}{cc}
\ce{H}\phantom{...}\ce{Cl}\phantom{..}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\\
|\phantom{....}|\phantom{....}|\phantom{....}|\phantom{....}|\\
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|\phantom{....}|\phantom{....}|\phantom{....}|\phantom{....}|\\
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