What is the decreasing order of nucleophilicity for the following nucleophiles?
$1. CH_3COO^-$
$2. CH_3O^-$
$3. CN^-$
$4. CH_3-C_6H_4-SO_3^-$ (tosylate ion)

Under the specified conditions,substrate $X$ undergoes substitution and elimination reactions to give products $A - D$. $A$ and $B$ are stereoisomers,but not enantiomers. $C$ and $D$ are enantiomers. $A$ is not an isomer of $C$. Which of the following could be the starting material $X$ ?
$X \xrightarrow[\Delta]{H_2O} A + B + C + D$

What happens when $CCl_4$ is treated with $AgNO_3$?

$2-$bromopentane is heated with potassium ethoxide in ethanol. The major product obtained is

The product obtained from the reaction is:

Match the following reactants with their corresponding products:
Reactants:
$(A)$ $C_2H_5Cl$,moist $Ag_2O$
$(B)$ $C_2H_5Cl$,ethanolic $AgCN$
$(C)$ $C_2H_5Cl$,ethanolic $AgNO_2$
$(D)$ $C_2H_5Cl$,ethanolic $KOH$
Products:
$(i)$ $CH_3CH_2ONO$
$(ii)$ $C_2H_4$
$(iii)$ $CH_3CH_2OH$
$(iv)$ $CH_3CH_2NC$
Select the correct match: