In which case is the formation of $butanenitrile$ possible?

Identify the correct decreasing order of reactivity of alkyl halides with ammonia.

In the presence of light,chloroform is slowly oxidised by air to form:

Write a note on Grignard Reagent.

Consider the reaction sequence shown below:
$Br-CH_2-CHO$ $\xrightarrow[\text{dry } HCl \text{ gas}]{\text{EtOH (excess)}} A$ $\xrightarrow{^tBuO^-K^+} B$
[Where $Et \Rightarrow -C_2H_5$,$^tBu \Rightarrow (CH_3)_3C^-$]
Identify the major products $A$ and $B$ formed respectively.

Why is the solubility of haloalkanes in water very low?