1. Tardigrade
  2. Question
  3. Chemistry
  4. An organic liquid ' A ' containing C , H and O with boiling point 78° C, possessing a rather pleasant odour, on heating with concentrated sulphuric acid gives a gaseous product ' B ' with the empirical formula, CH 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.

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Q. 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, $CH _{2}$. ' $B$ ' 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 $B$.

IIT JEEIIT JEE 1979Alcohols Phenols and Ethers

Solution:

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

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