The hydride gap corresponds to elements of

The calorific value of producer gas is low because of:

What characteristics do you expect from an electron-deficient hydride with respect to its structure and chemical reactions?

What is the sum of the number of neutrons and protons in the heaviest isotope of hydrogen?

When $1:2$ equivalence ratio of the gases $X$ and $Y$ are heated to $573 \ K - 673 \ K$ at $200-300 \ atm$ in the presence of $ZnO-Cr_2O_3$ catalyst,methanol is formed. Here,the gases $X$ and $Y$ are $X$ and $Y$ respectively.

Which of the following oxides cannot be reduced by hydrogen?