What else is present in a fire extinguisher besides $H_2SO_4$?

What is Carbogen?

Explain Ionic Hydrides (Saline Hydrides),Covalent (molecular hydrides),and Metallic (non-stoichiometric hydrides) with examples.

The calorific value of producer gas is low because of:

Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A:$ Hydrogen is an environment-friendly fuel.
Reason $R:$ Atomic number of hydrogen is $1$ and it is a very light element.
In the light of the above statements,choose the correct answer from the options given below:

The composition of water gas is