Among the following,the correctly matched pair is

Which one of the following methyl diboranes does not exist?

Given below are two statements:
Statement $I$ : Nickel is being used as the catalyst for producing syn gas and edible fats.
Statement $II$ : Silicon forms both electron rich and electron deficient hydrides.
In the light of the above statements,choose the most appropriate answer from the options given below:

Calorific value of producer gas is low because of

Give uses of Dihydrogen as a fuel.

Atoms in hydrogen gas have a preponderance of which isotope?