The major product obtained in the given reaction is:

When $2-$bromobutane reacts with alcoholic $KOH$,the reaction is called

Which of the following pairs are correctly matched?
| | Reactants | Products |
|---|---|---|
| $I.$ | $RX + AgOH(aq)$ | $RH$ |
| $II.$ | $RX + AgCN(alc)$ | $RNC$ |
| $III.$ | $RX + KCN(alc)$ | $RNC$ |
| $IV.$ | $RX + Na(ether)$ | $R-R$ |

What is the correct order of leaving group ability for the following groups?
$I. -OAc$
$II. -OMe$
$III. -OSO_2Me$
$IV. -OSO_2CF_3$

What is the product of the hydrolysis of trichloromethane with $KOH$?

Which of the following statements is correct?