For making $Ag$ from $AgNO_3$,which of the following is used?

$p$-Block elements form acidic,basic,and amphoteric oxides. Explain each property by giving two examples and also write the reactions of these oxides with water.

Which element does not show allotropy:

Which of the following reactions correctly represent the products formed upon heating?
$(a) \ NH_4NO_2 \xrightarrow{\Delta } N_2 + 2H_2O$
$(b) \ NH_4NO_3 \xrightarrow{\Delta } N_2O + 2H_2O$
$(c) \ Na_2CO_3 \xrightarrow{\Delta } Na_2O + CO_2$
$(d) \ NH_4Cl \xrightarrow{\Delta } NH_3 + HCl$

Which of the following reactions is not correctly matched with its products?

Which of the following tendencies remains unchanged on going down in the nitrogen family (Group-$15$)?