Predict the product for the following reaction:
$\xrightarrow[\Delta]{alc. \ KOH}$ product

When $1-$chlorobutane is treated with aqueous $KOH$,it gives $P$. However,when it is treated with alcoholic $KOH$,it gives $Q$. Identify the products $P$ and $Q$ respectively.

What is retention and inversion of configuration? Explain with suitable examples.

Match the $CH_{3}X$ compounds in Column-$(I)$ with their $C-X$ bond length in Column-$(II)$ and dipole moment in Column-$(III)$.

$(I)$ Compound	$(II)$ $C-X$ Bond Length $(pm)$	$(III)$ Dipole Moment $(D)$
$(A)$ $H_3C-F$	$(i)$ $214$	$(1)$ $1.636$
$(B)$ $H_3C-Cl$	$(ii)$ $193$	$(2)$ $1.830$
$(C)$ $H_3C-Br$	$(iii)$ $178$	$(3)$ $1.847$
$(D)$ $H_3C-I$	$(iv)$ $139$	$(4)$ $1.860$

Which of the following are correct statements about $C_2H_5Br$?

Gem dihalide on hydrolysis gives: