Which of the following conduct electricity in the fused state?

Match the average fundamental compounds with their proper percentage present in Portland cement.

Compound	Percentage proportion
$1. CaO$	$d. 50-60\%$
$2. Al_2O_3$	$a. 5-10\%$
$3. SO_3$	$b. 1-3\%$

To distinguish between $A$ and $B$,it is observed that both elements form oxides,but $B$ also forms a nitride when burnt in air. What are $A$ and $B$?

Choose the correct order.

On heating $ZnCl_2 \cdot 2H_2O$,the compound obtained is

Which of the following mixtures is known as fusion mixture?