SATHEE: Alcohols and Ethers - Result Question 59

Alcohols and Ethers - Result Question 59

####64. An organic liquid ’ $A$ ’ containing $C, H$ and $O$ with boiling point $78^{\circ} C$ , possessing a rather pleasant odour, on heating with concentrated sulphuric acid gives a gaseous product ’ $B$ ’ with the empirical formula, $C H_{2}$ . ’ $B$ ’ decolourises bromine water as well as alkaline permanganate solution and takes up one mole of $H_{2}$ (per mole of $B$ ) in presence of finely divided nickel at high temperature. Identify the substances $A$ and $B$ .

$(1979, 2 M)$

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Solution:

$A$ is ethanol because $B$ is an alkene (ethene).

$C_{2} H_{5} O H + Conc. H_{2} S O_{4} ⟶ C H_{2} = C H_{2} \to_{C H_{3} - C H_{3}}^{H_{2} / N i}$

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Alcohols and Ethers - Result Question 59

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