Properties of Dihydrogen

Give the reaction between magnetite and dihydrogen.

Give the reaction between copper oxide and dihydrogen.

How does dihydrogen reacts with chlorine?

What is the internuclear distance of hydrogen?

How many volts does it take to ionize hydrogen?

What is the first ionization energy of hydrogen?

Calculate the density of dihydrogen at $\mathrm{STP}$.

Write the value of density of hydrogen gas.

 The density of hydrogen at $\mathrm{STP}$ is $0.09 \mathrm{g} {\mathrm{L}}^{-1}$.

Name the oxides of three metals which can be reduced using hydrogen to give metal.

Which of the following metals is obtained by the reduction of metal oxide using hydrogen gas?

Hydrogen is used to reduce heavy metal oxides to metals in metallurgical processes. Comment.

Hydrogen atoms produced by dissociation of dihydrogen with the help of an electric arc are allowed to recombine generating temperatures of around $4000 \mathrm{K}$, this high temperature is used to _____ and weld the metals.

Hydrogen is used for cutting and welding metals.

Hydrogen finds application in cutting and welding processes. Comment.

The enthalpy of vaporization of hydrogen is less than its enthalpy of fusion.

The enthalpy of vaporization of hydrogen is found to be _____ $\mathrm{kJ} {\mathrm{mol}}^{-1}$.

Explain why there is a difference in the ionic radii of proton and the hydrogen anion. 

A hydrogen ion with a _____ charge has an ionic size greater than that of the hydrogen atom.

Why is the relative atomic mass different for each isotope of hydrogen?