The common form of periodic acid is $HIO_4 \cdot 2H_2O$ or $H_5IO_6$,which is known as:

The correct group of halide ions which can be oxidised by oxygen in acidic medium is

Given below are two statements:
Statement $I$: $SbCl_5$ is more covalent than $SbCl_3$.
Statement $II$: The higher oxides of halogens tend to be more stable than the lower ones.
In the light of the above statements,choose the most appropriate answer from the options given below:

Glass reacts with $HF$ to produce

Among the following halogens $F_2$,$Cl_2$,$Br_2$ and $I_2$,which can undergo disproportionation reaction?

Concentrated $H_2SO_4$ is not used to prepare $HBr$ from $KBr$ because it