Assertion : Nitroalkanes and alkyl nitrites exhibit functional isomerism.
Reason : Compounds having the same molecular formula but different functional groups are called functional isomers.
(A) Both assertion and reason are correct and reason is the correct explanation for assertion.
(B) Both assertion and reason are correct but reason is not the correct explanation of assertion.
(C) Assertion is correct but reason is incorrect.
(D) Both assertion and reason are incorrect.
VerifiedHint: Isomers are those having the same molecular formula and are different in properties. Functional isomers are those which differ in functional groups. Nitroalkanes and alkyl nitrites are two different functional groups.
Complete step by step answer:
Isomerism is the phenomenon by which more than one compound exists in a molecular formula but having different properties.
NItroalkanes and alkyl nitrites have the same molecular formula but have different properties . Hence, they are isomers. so, the assertion is correct.
Functional group isomers are those which differ in functional group. In the case of nitroalkanes and alkyl nitrites aslo, they both differ in functional groups as shown below:
Hence, reason is also correct.
Also, These exhibit functional isomerism because they are having the same molecular formula and different functional groups. Hence, reason is the correct explanation of assertion as well.
Therefore, the correct answer is option (A) Both assertion and reason are correct and reason is the correct explanation for assertion.
Additional information:
Among Isomerism, there are two types : structural and stereoisomerism.
Among structural isomers there are :
(i) Chain
(ii) Position
(iii) Functional
(iv) Metamerism
(v) Tautomerism
Among stereoisomers, there are :
(i) Geometrical
(ii) Optical isomers.
Chain isomers are those which differ in the chain structure. For Eg: ${ C }_{ 5 }{ H }_{ 12 }$ and ${ C }_{ 6 }{ H }_{ 14}$ .
Position isomers are those which differ in the position of functional group or substituent.
For Eg :
Note: ${ NO }_{ 2 }$ group is a well known ambidentate ligand. Ambidentae ligands are those which consist of two donor atoms / sides but at a time , only one can be given. Here in the case of ${ NO }_{ 2 }$, when it is donated by N, then it is known as nitrito-N and when donated by O, then it is known as nitrito-O group.
