The conductivity of semiconductors $..........$ with an increase in temperature.

What type of magnetism is exhibited by $MnO$?

Match the column $A$ (type of crystalline solid) with the column $B$ (example for each type).

$P$. Molecular solid	$i$. $SiC$
$Q$. Ionic solid	$ii$. $Mg$
$R$. Metallic solid	$iii$. $H_2O$
$S$. Network solid	$iv$. $MgO$

Match List-$I$ with List-$II$ based on the type of solid and its example:

List-$I$ (Type of solid)	List-$II$ (Example)
$(A)$ Metallic	$(1)$ Diamond
$(B)$ Ionic	$(2)$ Ice
$(C)$ Molecular	$(3)$ $NaCl$
$(D)$ Covalent	$(4)$ $Cu$

Which of the following dopant is used in silicon to produce $p$-type semiconductor?

$A$ solid which is very hard,has a very high melting point in the solid state,is an insulator,and becomes a conductor of electricity in its molten state is a/an ..... solid.