What happens when concentrated $H_2SO_4$ reacts with sugar?

Which one of the following metals forms interstitial hydride easily?

Commercially,methanol is prepared by:

The correct statements among $(a)$ to $(d)$ regarding $H_2$ as a fuel are:
$(a)$ It produces fewer pollutants than petrol.
$(b)$ $A$ cylinder of compressed dihydrogen weighs $\sim 30$ times more than a petrol tank producing the same amount of energy.
$(c)$ Dihydrogen is stored in tanks of metal alloys like $NaNi_5$.
$(d)$ On combustion,the values of energy released per gram of liquid dihydrogen and $LPG$ are $142$ and $50 \ kJ,$ respectively.

Hydrogen behaves as an oxidising agent when it reacts with:

Which of the following drying agents reacts with $CO_2$ and also removes moisture?