Which of the following is not correct?
- A$3 O_2 \underset{\text{silent electric discharge}}{\rightleftharpoons} 2 O_3 ; \Delta H = -284.5 \ kJ$
- BOzone undergoes addition reaction with unsaturated carbon compounds.
- CSodium thiosulphate reacts with $I_2$ to form sodium tetrathionate and sodium iodide.
- DOzone oxidises lead sulphide to lead sulphate.
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Statement $II$: The boiling points of these hydrides increase with an increase in molar mass.
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