Chemistry - Coordination Chemistry Question with Solution | TestHub

(A) Chain isomerism

• Same molecular formula and –CN group present.
• Only carbon chain arrangement is different.
• One straight, one branched.
• This is chain isomerism.
• So match is correct.

(B) Ring-chain isomerism

• One is open chain, other is cyclic.
• But functional arrangement also changes.
• Not true ring-chain pair.
• Hence incorrect match.
• So option wrong.

(C) Conformational isomerism

• Both are chair forms of cyclohexane.
• Interconvert by chair flip.
• No bond breaking.
• Axial ↔ equatorial change.
• So correct match.

(D) Geometrical isomerism

• Restricted rotation in ring/double bond.
• Different spatial arrangement.
• Cis and trans forms present.
• Same connectivity, different shape.
• So correct match.