Q. Why does hydrogen occur in a diatomic form rather than in a monoatomic form under normal conditions?

Q. What do you understand by electron deficient compounds of hydrogen.

Q. Do you expect the carbon hydrides of the type $\left(C_n{H}_{2n+2}\right)$ to act as Lewis acid or base? Justify your answer.

Q. Describe the bulk preparation of dihydrogen by electrolytic method. What is the role of an electrolyte in this process ?

Q. What do you understand by (i) electron-deficient, (ii) electron-precise, and (iii) electron-rich compounds of hydrogen?

Q. Justify the position of hydrogen in the periodic table on the basis of its electronic configuration.

Q. Saline hydrides are known to react with water violently producing fire. Can $C{O}_2$, a well known fire extinguisher, be used in this case? Explain.

Q. Complete the following reactions:

Q. How does the atomic hydrogen or oxy-hydrogen torch function for cutting and welding purposes? Explain.

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Q. Write the names of isotopes of hydrogen. What is the mass ratio of these isotopes?

Q. What do you understand by the term non-stoichiometric hydrides? Do you expect this type of the hydrides to be formed by alkali metals? Justify your answer.

Q. Discuss the consequence of high enthalpy of H-H bond in terms of chemical reactivity of dihydrogen.

Q. How do you expect the metallic hydrides to be useful for hydrogen storage? Explain.

Q. Among $N{H}_3$, $H_{2}O$ and $HF$, which would you expect to have highest magnitude of hydrogen bonding and why?

Q. Complete the following reactions:

Q. How can the production of dihydrogen, obtained from coal gasification, be increased?

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

Q. Complete the following reactions:

Q. What do you understand by electron rich compounds of hydrogen.