Ammonium nitrate decomposes on heating into

The sum of protons,electrons and neutrons in the heaviest isotope of hydrogen is

Which property of hydrogen distinguishes it from alkali metals?

Given below are two statements,one is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A:$ Isotopes of hydrogen have almost same chemical properties,but difference in their rates of reaction.
Reason $R:$ Isotopes of hydrogen have different enthalpy of bond dissociation.
In the light of the above statements,choose the most appropriate answer from the options given below:

The calorific value of producer gas is low because of:

Hydrogen can be obtained from water,by the action of water on