Question

Which among these describes the process by which ammonia is produced by the reaction of nitrogen with hydrogen at 200 atm pressure and in the presence of a catalyst?

• A. Contact process
• B. Hydrogenation
• C. Calcination
• D. Haber process

Answer 1

The correct option is D Haber process

Haber Process is the process of formation of ammonia from nitrogen and hydrogen at very high pressure and temperature in the presence of Fe- catalyst.

$N_2\left(g\right)+3H_2\left(g\right)\to 2N{H}_3\left(g\right)$

Contact Process is the process of manufacturing concentrated sulphuric acid from sulfur dioxide and oxygen in the presence of a hot catalyst $V_2{O}_5$.

$2S{O}_2\left(g\right)+O_2\left(g\right)\rightleftharpoons 2S{O}_3\left(g\right)$

$S{O}_3\left(g\right)+H_{2}O\left(l\right)\to H_{2}S{O}_4\left(l\right)$

Calcination is the process of heating oxide/carbonate ores at high temperatures in limited supply or in the absence of air. This is done to mainly remove volatile substances, water, or oxidize the substance.

E.g. Calcination of Calcium carbonate is done to remove Carbon dioxide.

$CaC{O}_3\left(s\right)\to CaO\left(s\right)+C{O}_2\left(g\right)$

Hydrogenation is the process of the addition of hydrogen to unsaturated hydrocarbons in the presence of nickel/palladium/platinum as a catalyst.
E.g. Hydrogenation of ethene in the presence of Ni/Pd catalyst.

$C{H}_2=C{H}_2\left(g\right)+H_2\left(g\right)\to C{H}_3-C{H}_3\left(g\right)$