Which bond in ethyl alcohol undergoes cleavage during its reaction with sodalime?

In the following sequence of reactions,
$CH_3CH_2CH_2Br$ $\xrightarrow{KOH(alc.)}$ $(A)$ $\xrightarrow{HBr}$ $(B)$ $\xrightarrow{KOH(aq.)}$ $(C)$
The product $(C)$ is

When isobutyl magnesium bromide in dry ether is treated with absolute ethyl alcohol,the products formed are

Predict the major product of acid-catalyzed dehydration of:
$(i)$ $1$-methylcyclohexanol
$(ii)$ butan-$1$-ol

For the given reaction,if the final product is a mixture of $C_4H_8Br_2$ isomers,what is the value of $X$ (the number of alkenes formed in the mixture)?

Identify the missing reagent/condition in the following reaction:
$CH_3CH_2OH \xrightarrow{?} CH_3CH_2-O-CH_2CH_3$