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QJEEM23Chd18a: JEE Main 2023 Chemistry - Class 11 JEEM23Chd18a Solution: But-2-yne is reacted separately with one mole of Hydrogen as…

But-2-yne is reacted separately with one mole of Hydrogen as shown below :

JEE Main 2023 (Online) 1st February Morning Shift Chemistry - Hydrocarbons Question 53 English

A. A is more soluble than B.

B. The boiling point & melting point of A are higher and lower than B respectively.

C. A is more polar than B because dipole moment of A is zero.

D. Br2\mathrm{Br_2} adds easily to B than A.

Identify the incorrect statements from the options given below :

Multiple Choice Options

  • A A and B only
  • B A, C & D only
  • C B, C & D only
  • D C and D only

Step-by-Step Verified Solution

JEE Main 2023 (Online) 1st February Morning Shift Chemistry - Hydrocarbons Question 53 English Explanation
cis-2-butene is more polar that is why it's solubility is more than trans-2-butene.

∴\therefore A is correct.

cis-2-butene has a lower melting point than trans-2-butene as trans-form has compact packing crystal lattice. cis-2-butene is polar so, it has higher boiling point than trans-form.

∴\therefore B is also correct.

cis-2-butene is more polar but dipole moment of cis-2-butene(A) is not zero.

∴\therefore C is incorrect.

'Cis' structure is less stable than 'Trans" structure. Less stable means more reactive. So Cis - But-2-ene(A) will react more easily with Br2.

∴\therefore D is also incorrect.

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