When a $1^o$ alkyl halide reacts with an alkoxide,what is the product obtained?

Preparation of ethers by acid dehydration of secondary or tertiary alcohols is not a suitable method. Give reason.

Which of the following halogenated compounds is not used in Williamson$'$s synthesis?

The compound $(CH_3)_3C-O-CH_3$ is best prepared by which of the following reactions?

Write the reactions of Williamson synthesis of $2-$ethoxy$-3-$methylpentane starting from ethanol and $3-$methylpentan$-2-$ol.

Ethers can be prepared by Williamson synthesis in which an alkyl halide is reacted with sodium alkoxide. Di-tertiary ether cannot be prepared by this method. Explain.