On what basis was the name of chlorine derived?

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:

Which gas has been used since ancient times to remove lignin from wood?

The correct statement$(s)$ about the oxoacids,$HClO_4$ and $HClO$,is(are):
$[A]$ $HClO_4$ is more acidic than $HClO$ because of the resonance stabilization of its anion.
$[B]$ $HClO_4$ is formed in the reaction between $Cl_2$ and $H_2O$.
$[C]$ The central atom in both $HClO_4$ and $HClO$ is $sp^3$ hybridized.
$[D]$ The conjugate base of $HClO_4$ is a weaker base than $H_2O$.

Which among the following is used as an oxidizing agent to bleach wood pulp into white paper?

Considering the parameters such as bond dissociation enthalpy,electron gain enthalpy and hydration enthalpy,compare the oxidising power of $F_{2}$ and $Cl_{2}$.