Identify the statements which are not correct?
$(i)$ $ZnO, PbO, Sb_2O_3$ are neutral oxides.
(ii) $CO$ and $NO$ are amphoteric oxides.
(iii) $CrO_3, Mn_2O_7, V_2O_5$ are basic oxides.

Which of the following gases can displace all other gases from a mixture?

In the reaction $2Br^- + X_2 \to Br_2 + 2X^-$,$X_2$ is .......

Use the periodic table to answer the following questions.
$(a)$ Identify an element with five electrons in the outer subshell.
$(b)$ Identify an element that would tend to lose two electrons.
$(c)$ Identify an element that would tend to gain two electrons.
$(d)$ Identify the group having metal,non-metal,liquid as well as gas at room temperature.

The element with $Z = 120$ (not yet discovered) will be a/an:

$Mg$ and $Li$ are similar in their properties due to