The formation of $Al_2O_3$ involves the evolution of a large quantity of heat,which makes its use in:

The $C-C$ bond length is maximum in?

Among the following nitrates,Lead nitrate,Silver nitrate,and Ammonium nitrate; the one that decomposes without leaving any solid residue is

White lead is

Which of the following halides is the most stable?

Reaction of an inorganic sulphite $X$ with dilute $H_{2}SO_{4}$ generates compound $Y$. Reaction of $Y$ with $NaOH$ gives $X$. Further,the reaction of $X$ with $Y$ and water affords compound $Z$. $Y$ and $Z$,respectively,are: