Preparation of HBr and HI

Q.

Which one is known as Oil of vitriol?

1. ${\mathrm{H}}_2{\mathrm{SO}}_3$

2. ${\mathrm{H}}_2{\mathrm{SO}}_4$

3. ${\mathrm{H}}_2{\mathrm{S}}_2{\mathrm{O}}_7$

4. None of these

Q. The number of lone pair(s) on the compound which is obtained by heating a mixture of $Xe$ and $F_2$ in the ratio 1:5 in a sealed nickel tube is

Q. The number of lone pair(s) on the compound which is obtained by heating a mixture of $Xe$ and $F_2$ in the ratio 1:5 in a sealed nickel tube is

Q. A binary compound of zinc and sulphur contains $67.1\%$ zinc by mass. The ratio of zinc and sulphur atoms in the compound is $x:y$. Then, $x+y$ is:

Q. The number of lone pair(s) on the compound which is obtained by heating a mixture of $Xe$ and $F_2$ in the ratio 1:5 in a sealed nickel tube is

Q. The number of lone pair(s) on the compound which is obtained by heating a mixture of $Xe$ and $F_2$ in the ratio 1:5 in a sealed nickel tube is