Science
Assertion (A) : C4H8, C4H6 and C4H10 are members of the same homologous series.
Reason (R) : C4H8, C4H6, C3H4, C3H6, C2H4, C2H2 are unsaturated hydrocarbons.
options
- Both A and R are true, and R is the correct explanation of A.
- Both A and R are true, and R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Organic Chemistry
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Answer
A is false but R is true.
Reason —
Assertion (A) is false because a homologous series is a group of organic compounds that have the same functional group and show a regular difference of –CH2– between successive members.
Here :
- C4H10 is an alkane (saturated hydrocarbon).
- C4H8 is an alkene (one double bond).
- C4H6 is an alkyne (one triple bond).
Since they belong to different functional groups (alkane, alkene and alkyne), they cannot be members of the same homologous series.
Reason (R) is true because all these compounds contain either double or triple bonds, which makes them unsaturated hydrocarbons.
Hence, A is false but R is true.
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