Arrange the acids $H_2SO_4$,$H_3PO_4$,and $HClO_3$ in the decreasing order of their acidic strength.

Bond enthalpy of $Ge-Ge$ bond is $260 \ kJ \ mol^{-1}$. The bond enthalpies of $Si-Si$ and $Sn-Sn$ bonds in $kJ \ mol^{-1}$ are respectively

The decreasing order of basic character of $K_2O$, $BaO$, $CaO$ and $MgO$ is

The first member of each group of representative elements (i.e.,$s$- and $p$-block elements) shows anomalous behaviour. Illustrate with two examples.

Which one of the following represents the electronic configuration of the most electropositive element?

Given below are two statements:
Statement $I$ : Both metal and non-metal exist in $p$ and $d-$block elements.
Statement $II$ : Non-metals have higher ionisation enthalpy and higher electronegativity than the metals.
In the light of the above statements,choose the most appropriate answer from the option given below: