Chemistry
Answer
(a) Catalytic hydrogenation is a process by which hydrogen gas is passed through vegetable oils in the presence of a catalyst like Ni, Pt or Pd to convert the oils into vanaspati ghee.
(b) Oxidation is a chemical process that involves addition of oxygen to a substance or removal of hydrogen from a substance.
(c) Reduction is a chemical process that involves addition of hydrogen to a substance or removal of oxygen from a substance.
(d) Redox reactions are those in which reduction and oxidation both take place simultaneously i.e., one substance is reduced while the other gets oxidized.
Related Questions
(a) Name a process by which hydrogen gas is manufactured.
(b) Give equations for the reactions.
(c) How is hydrogen separated from carbon dioxide and carbon monoxide?
State four uses of hydrogen.
Equal volumes of hydrogen and chlorine are exposed to diffused sunlight to prepare
- hydrogen chloride
- water
- sodium hydroxide
- hydrochloric acid
The metal which reacts with cold water to produce hydrogen is
- magnesium
- aluminium
- calcium
- iron