Which among the following has the lowest boiling point?

What is produced when toluene is heated with chlorine in the presence of light and in the absence of a halogen carrier?

Consider the following reaction:
$CH_3-CH_2-CH(Br)-CH_3 \xrightarrow{alc. KOH, \Delta} CH_3-CH_2-CH=CH_2 (I) + CH_3-CH=CH-CH_3 (II)$
Which of the following statements are correct?
$a.$ $I$ is the major product of the reaction
$b.$ $II$ is the major product of the reaction
$c.$ Formation of $I$ is in accordance with Saytzeff's rule
$d.$ $II$ is more stable because it is more substituted

Which among the following reactions does not occur?

Acetone is mixed with bleaching powder to give

Which product is obtained from the reaction between $CH_3ONa$ and $(CH_3)_3CBr$?