Chemistry · Isomerism: structural and stereoisomerism

The compound of the formula _{5} \boldsymbol{C H}=\boldsymbol{C H}-\boldsymbol{C

The compound of the formula \( \boldsymbol{C H}_{3} \boldsymbol{C O}\left(\boldsymbol{C H}_{2}\right)_{5} \boldsymbol{C H}=\boldsymbol{C H}-\boldsymbol{C O O H} \) would be expected to: I rotate the plane polarised light II : contain chiral centre III : contain three stereocentres IV: show geometrical isomerism

  • A. Only I, II, II are correct.
  • B. Only II, IV are correct.
  • C. ।, ॥, ॥I, IV are correct.
  • D. only IV is correct.

Step-by-step solution

The compound CH3CO(CH2)5CH=CHCOOH has no chiral centers (all carbons in the chain are either sp2 or equivalent) and does not rotate plane polarized light, so I and II are false. It has only one stereogenic element (the double bond), not three, so III is false. The double bond can exhibit cis/trans isomerism, so IV is correct.
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