Identify the major product $Y$ in the given reaction sequence.

Choose the correct decreasing order of reactivity of alkyl halides towards $S_{N}1$ reaction.

Explain why:
$(i)$ the dipole moment of chlorobenzene is lower than that of cyclohexyl chloride?
$(ii)$ alkyl halides,though polar,are immiscible with water?
$(iii)$ Grignard reagents should be prepared under anhydrous conditions?

Which of the following chloro compounds has a dipole moment?

Which of the following statements is correct for optically active alkyl halides,upon reaction with nucleophiles?

	$S_{N}1$	$S_{N}2$
$(a)$	Retention of configuration	Inversion of configuration
$(b)$	Racemisation	Inversion of configuration
$(c)$	Inversion of configuration	Retention of configuration
$(d)$	Racemisation	Retention of configuration

Which of the following compounds will undergo $S_{N^1}$ reaction most easily?