Major products $A$ and $B$ formed in the following reaction sequence are:

For the given reaction $R-C(R_1)(R_2)-X \xrightarrow{HOH} R-C(R_1)(R_2)-OH$,which substrate will give maximum racemisation?

What is the product $P$ obtained in the following reaction? $CH_3CH_2Br + AgCN_{(alc)} \rightarrow P$

The order of $S_N 1$ reactivity in aqueous acetic acid solution for the compounds:
$1$. $CH_3-CO-CH_2-Cl$
$2$. $CH_3-CH_2-CH_2-Cl$
$3$. $(CH_3)_3C-Cl$
is

Which of the following compounds undergoes nucleophilic substitution by $OH^-$ ions to form a racemic mixture?

$A$ bottle containing $C_6H_5I$ and $C_6H_5CH_2I$ has lost its label. To identify them,samples $A$ and $B$ are taken in separate test tubes and boiled with $NaOH$ solution. Finally,the solution in each test tube is acidified with dilute $HNO_3$ and then a few drops of $AgNO_3$ solution are added. Substance $B$ gives a yellow precipitate. Which statement is correct for this process?