The cycloalkene (X) on bromination consumes one mole of bromine per mole of (X) and gives the product (Y) in which C : Br ratio is 3 : 1. The percentage of bromine in the product (Y) is __________ %. (Nearest integer) (Given: molar mass in g H : 1, C :

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Solution

Q.
The cycloalkene (X) on bromination consumes one mole of bromine per mole of (X) and gives the product (Y) in which C : Br ratio is 3 : 1. The percentage of bromine in the product (Y) is __________ %. (Nearest integer)

(Given: molar mass in g ${mol}^{- 1}$ H : 1, C : 12, O : 16, Br : 80) [2026]

Ans.
(66)

$C_{6} H_{10} \overset{{Br}_{2}}{\to} C_{6} H_{10} {Br}_{2}$

$Molecular mass of C_{6} H_{10} {Br}_{2} is:$

$12 \times 6 + 10 + 160$

$72 + 10 + 160 = 242$

$% of Br = \frac{160}{242} \times 100$

$% of Br = 66.11 % \approx 66 %$

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