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Alcohols, Phenols and Ethers

Short Answer Type

151. Sodium metal can be used for drying diethyl ether and benzene but not ethanol. Why?

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152. How does anisole react with Br₂ in CS₂?

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153. How will you distinguish between 1-phenyl ethanol and 2-phenyl ethanol?

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154.
How is phenol obtained from aniline?

A diazonium salt is formed by treating an aromatic primary amine with nitrous acid (NaNO₂ + HCl) at 273-278 K. Diazonium salts are hydrolysed to phenols by warming with water or by treating with
dilute acids.

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155.

Explain giving reasons, why Phenol has a smaller dipole moment than methanol.

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156.

If an alcohol is treated with excess of sulphuric acid, no esterification takes place. Why?

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157.

How many sigma bonds are present in 3-methyl phenol?

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158. Give the equation of the reaction of bromine in carbon disulphide with phenol.

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159.

Ethanol and chloro ethane both are polar in nature yet ethanol is miscible in water while chloro ethane is immiscible. Explain.

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160.

Give IUPAC names of the following compounds:

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Previous Year Papers

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Test Yourself

Short Answer Type

154. How is phenol obtained from aniline?

154.
How is phenol obtained from aniline?