Carnallite is a mineral of

Match column $-I$ with column $-II$ :

Column $-I$	Column $-II$
$(a)$ Borax	$(p)$ $NaCl$
$(b)$ Carnallite	$(q)$ $KCl$
$(c)$ Rock salt	$(r)$ $KCl.MgCl_2.6H_2O$
$(d)$ Silvine	$(s)$ $Na_2B_4O_7.10H_2O$

Among alkali metals,lithium is the strongest reducing agent. Which of the following factors is responsible for this?

The magnetic behaviour of $Li_2O$,$Na_2O_2$ and $KO_2$,respectively,are

Starting with sodium chloride,how would you proceed to prepare:
$(i)$ sodium metal
$(ii)$ sodium hydroxide
$(iii)$ sodium peroxide
$(iv)$ sodium carbonate?

Which of the following elements does not form an amide when reacted with ammonia?