Previous Year NEET Question- Hydrocarbons

• 2019: The number of isomeric alkenes with the molecular formula C6H12 is: 3 4 5 6

The answer is (D).

There are 18 isomers of C6H12:

CH3CH2CH2CH2CH2CH3 2. CH3CH2CH(CH3)CH2CH3 3. CH3CH(CH3)CH2CH2CH3 4. CH3CH2CH(CH3)CH(CH3)2 5. CH3CH(CH3)2CH2CH2CH3 6. (CH3)3CCH2CH3

• 2018: The IUPAC name of the compound CH3-CH(CH3)-CH2-CHO is: (A) 2-methylbutanal (B) 3-methylbutanal (C) 3-methylpropanal (D) 2-methylpropanal

The answer is (A).

The IUPAC is an international organization that standardizes chemical nomenclature, symbols, and terminology.