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Statement $I$ : Gallium is used in the manufacturing of thermometers.
Statement $II$ : A thermometer containing gallium is useful for measuring the freezing point ( $256 \mathrm{~K}$ ) of brine solution.
In the light of the above statement, choose the correct answer from the options given below :
$4 HNO _{3}(l)+3 KCl ( s ) \rightarrow Cl _{2}( g )+ NOCl ( g )+ 2 H _{2} O ( g )+3 KNO _{3}( s )$
The amount of $HNO _{3}$ required to produce $110.0 \;g$ of $KNO _{3}$ is $...... \;g$
(Given : Atomic masses of $H , O , N$ and $K$ are $1 , 16,14$ and $39$ respectively.)
$(II)\, O^+_2 ,NO,N^-_2$ have same bond order of $2 \frac{1}{2}$
$(III)$ Bond order can assume any value including zero upto four
$(IV)\, NO^-_3$ and $BO^-_3$ have same bond order for $X - O$ bond (where $X$ is central atom)