The product of the reaction is:

When $AgNO_3$ comes in contact with skin,it leaves a black stain. This is because of

Name the following reaction: $CH_3CH_2Cl + NaI \xrightarrow{\text{acetone}} CH_3CH_2I + NaCl$

$A$ compound $(a)$,$C_8H_9Br$,gives a white precipitate when heated with alcoholic $AgNO_3$. Oxidation of $(a)$ gives an acid $(b)$. The acid $(b)$,$C_8H_6O_4$,easily forms an anhydride on heating. Identify the compound $(a)$.

Arrange the following compounds in decreasing order of reactivity towards $E_2$ reaction:
$(x)$ $CH_3-CH_2-CH_2-Br$
$(y)$ $CH_3-CH(Br)-CH_3$
$(z)$ $(CH_3)_3C-Br$

Reaction of $(R)-2$-butanol with $p$-toluenesulphonyl chloride in pyridine followed by reaction with $LiBr$ gives