To which group does the plant shown in the given figure belong?

Which one of the following is not a correct statement?

Which one of the following oxides is reduced by water gas to obtain the metal during its extraction?

Assertion : $HClO_4$ is a stronger acid than $HClO_3$.
Reason : Oxidation state of $Cl$ in $HClO_4$ is $+7$ and in $HClO_3$,it is $+5$.

$A$ vessel contains $1 \, mole$ of $O_2$ gas (molar mass $32$) at a temperature $T$. The pressure of the gas is $P$. An identical vessel containing one mole of $He$ gas (molar mass $4$) at a temperature $2T$ has a pressure of:

The silicate having one monovalent corner oxygen atom in each tetrahedron unit is: