Commercially, `CO_(2)` is produced as a byproduct during the manufacture of
(i) quicklime
(ii) etyhyl alcohol
(iii) hydrogen
(iv) ammonia

Options

A. (i), (ii), (iii), (iv)
B. (i), (ii) , (iii)
C. (ii), (iii), (iv)
D. (i), (ii)

Answer

B

Explanation

The main industrial source is as a byproduct from the manufacture of hydrogen for making ammonia:
`CO+underset(("steam"))(H_(2)O)hArrCO_(2)+H_(2)`
`CH_(4)+underset(("Steam"))(2H_(2)O) rarr CO_(2)+4H_(2)`
Iot is also recovered from fementation process in breweries:
`C_(6)H_(12)O_(6)underset("anaerobic conditions")overset("Yeast under")rarr2C_(2)H_(5)OH+2CO_(2)`
From the gases evolved from calcining limestone in line kilns:
`CaCO_(3)overset("Strong heat")rarrCaO+CO_(2)`
and from the flue gases from coal-burning electric power stations.
`CO_(2)` is recovered by absorbing it in either equeous `Na_(2)CO_(3)`:
`Na_(2)CO_(3)+CO_(2)+H_(2)Ooverset("Cool")underset("Heat")hArr2NaHCO_(3)`
or ethanolamine (Girbotal's process):
` 2HOCH_(2)CH_(2)NH_(2)+CO_(2)+H_(2)O underset(underset((HOCH_(2)CH_(2)NH_(3))_(2)CO_(3))(100-150^(@)C)) overset(30-60^(@)C)(hArr)`