Dehydration of ethanol gives

What are the products of the following reaction: $Me_2C=CHCH_3 \xrightarrow[(ii)\, H_2O]{(i)\, O_3}$?

What is the product of Hydroboration-oxidation of but-$1$-ene?

The major product of the following reaction is:

Alkene can be prepared from alkyl halide by the following reagent: $R-CH_2-CH_2-X + \text{Base} \to \text{Alkene} + \text{Base-H} + X^-$

Assertion : $trans-but-2-ene$ on reaction with bromine forms a racemic mixture.
Reason : $trans-$Compound in $trans$ addition forms two types of stereoisomers.