Which of the following gives an unsaturated hydrocarbon product when treated with conc. sulphuric acid

sugar

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oxalic acid

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carbon

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ethanol

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Solution

The correct option is D
ethanol

Sugar gives C, carbon gets oxidised to $C O_{2}$ and oxalic acid gives CO and $C O_{2}$ and $H_{2} O$ . When ethanol $C_{2} H_{5} O H$ reacts with concentrated sulphuric acid, ethene is formed, which has a double bond, hence unsaturated.

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Which of the following gives an unsaturated hydrocarbon product when treated with conc. sulphuric acid

The correct option is D ethanol Sugar gives C, carbon gets oxidised to CO2 and oxalic acid gives CO and CO2 and H2O. When ethanol C2H5OH reacts with concentrated sulphuric acid, ethene is formed, which has a double bond, hence unsaturated.

The correct option is D
ethanol

Sugar gives C, carbon gets oxidised to $C O_{2}$ and oxalic acid gives CO and $C O_{2}$ and $H_{2} O$ . When ethanol $C_{2} H_{5} O H$ reacts with concentrated sulphuric acid, ethene is formed, which has a double bond, hence unsaturated.