Properties of hydrogen

The boiling point of hydrogen is 20K

Define the melting point of a substance. What is the melting point of hydrogen?

Under catalytic conditions, write the reaction between hydrogen and oxygen.

Explain whether the hydrogen combustion reaction is endothermic or exothermic.

Write the reaction between hydrogen gas and chlorine gas.

Complete the reaction:

${\mathrm{H}}_2+\mathrm{S}\to$

Write the reaction between hydrogen gas and sulphur.

At room temperature, coke will react with hydrogen gas and form methane gas.

When hydrogen gas reacts with carbon elements at ______, the product formed is methane.

Complete the following reaction:

$\mathrm{C}\left(\mathrm{s}\right)+2{\mathrm{H}}_2\left(\mathrm{g}\right)\stackrel{1000 {}^{\mathrm{o}}\mathrm{C}}{\to }$

Write the reaction between hydrogen gas and carbon at $1000 {}^{\mathrm{o}}\mathrm{C}$.

When hydrogen gas reacts with carbon elements at $1000 {}^{\mathrm{o}}\mathrm{C}$, the product formed is 

Write a balanced chemical equation for the reaction of hydrogen with oxygen.