Q19 / 160 · AP EAMCET 2023 (17 May Shift 2) · Chemistry

Identify the correct statements with respect to cis/trans-2butene from the following I. cis-2-Butene is more polar than trans - 2 Butene II. melting point of cis- 2- Butene is greater than that of trans- 2- Butene III. boiling point of cis- 2- Butene is greater than that of trans- 2-Butene Correct answer is

  • A
    I, II only
  • B
    II, III only
  • Correct answer
    C
    I, III only
  • D
    I, II, III

Solution

cis-2-Butene is more polar than trans-2-butene as the bond dipole moment gets cancelled out in trans-2butene. Thus, Statement I is correct. Due to polar nature, cis-2-butene boils at a higher temperature. Thus, III is correct. Due to symmetric structure, the melting point of trans-2butene is higher than that of cis-2-butene. Thus, II is incorrect.

Hence, the correct answer is option: 'C'.

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