Why is chloroform stored in dark-colored bottles?

Assertion: $2-$Bromobutane on reaction with sodium ethoxide in ethanol gives $1-$butene as a major product.
Reason: $1-$Butene is more stable than $2-$butene. According to Saytzeff's rule,$2-$butene should be the product which is more branched or substituted compound and hence,more stable than $1-$butene.

Which of the following halides will give $S_N 1$ reaction fastest?

$Me_2C = CH - CH_2 - CH_2 - Cl$ $\xrightarrow[CaCO_3]{H_2O} (X);$ What is the major product $(X)$ of the reaction?

Which of the following statement$(s)$ is/are true about alkyl halides?

Which of the following compounds has the highest boiling point?