Which of the following is not a characte...

Which of the following is not a characteristic of homologous series ?

They have different general formula .

The successive compounds differ by `-CH_(2)` unit.

Molecular mass increases down the series.

Members of homologous series show similar chemical properties.

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A homologous series is a series of organic compounds which belong to the same family (i.e. possess same functional group) and show similar chemical properties. The members of this series are called homologous and differ from each other by the number of CH_(2) , units in the main carbon chain Which of the following is not the property of a homologous series?

They show similar chemical properties.

They differ by 14 units by mass.

They all contain double bond

They can be represented by a general formula.

They show similar chemical properties.

They differ by 14 units by mass.

They all contain double bond

They can be represented by a general formula

`CH_(3)NH_(2), (CH_(3))_(2)NH,(CH_(3))_(3)N`

`Ph-OH,Ph-CH_(2)-CH,Ph-CH_(2)-CH_(2)-OH`

`HCOOH,CH_(3)COOH,CH_(3)COOCH_(3)`

none of these