Question

Assertion (A): If the first member of a homologous series is methanal, its third member will be propanal. Reason (R): All the members of a homologous series show similar chemical properties.​

Answer 1

Both assertion and reason are true but the reason is not the correct explanation of the assertion.

• The assertion statement is 'If the first member of a homologous series is methanal, its third member will be propanal.'
• The reason statement is 'All the members of a homologous series show similar chemical properties.​'
• The assertion statement is correct as the first member of a homologous series is methanal and the third is propanal.
• The reason statement is also correct as all the members of the homologous series have the same chemical properties.
• The reason stated is not the correct explanation of the assertion statement.

Hence, (c) is correct both assertion and reason are true but the reason is not the correct explanation of the assertion.