JEE Main 2022 · 29 Jul · Shift 2 · Chemistry Q73

← JEE Main 2022 · 29 Jul · Shift 2

ChemistrySingle correct+4 / -1Question 73 of 90

Correct structure of γ-methylcyclohexane carbaldehyde is

3-Methylcyclohexane-1-carbaldehyde

Option A: cyclohexane ring with CHO on one carbon and CH3 on the carbon two positions away (3-methylcyclohexanecarbaldehyde).

(3-Methylcyclohexyl)acetaldehyde

2-Methylcyclohexane-1-carbaldehyde

Option C: cyclohexane ring with CHO and an adjacent methyl (2-methylcyclohexanecarbaldehyde).

(2-Methylcyclohexyl)acetaldehyde

Answer and worked solution

Official answer: A

Common name. In ring carbaldehydes the Greek letters count from the ring carbon bearing CHO: α is C-1, β is C-2, γ is C-3. So the methyl is on C-3: 3-methylcyclohexanecarbaldehyde.

(A)

Topics:IUPAC nomenclature

← Previous question Next question →

JEE Main 2022 · 29 Jul · Shift 2, Chemistry question 73