1
Question
Match the processes in column I with their respective names in column II.
Process Name of reaction
Process Name of reaction
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Solution
(A) Burning of gasoline and human respiration are redox reactions or intermolecular redox processes.
(B) Preparation of metals from their ores and production by the lightning of nitrogen oxides from nitrogen and oxygen in the atmosphere are redox reactions or intermolecular redox processes.
(C) Evaporation of water and production by the lightning of O3 from O2 involve physical changes.
The production of O3 from O2 by lightning is the change of an element in one form (oxidation state = 0) to another form (oxidation state = 0) and is also called allotropy.
(D) The reaction of oxalic acid with NaOH is an acid-base reaction or neutralisation reaction.
(COOH)2+2NaOH⇌(COONa)2+2HOH
(E) The reaction 2Mn2O7⟶4MnO2+3O2, is intramolecular redox reaction: One atom of a molecule is oxidised and the other atom is reduced. Th oxidation state of Mn changes from +7 to +4. Thus, it is reduced. The oxidation number of oxygen changes from -2 to 0. Thus, it is oxidized.
(F) The reaction Fe+N2H4→NH3+Fe(OH)2, is redox reaction or intermolecular redox processes. One molecule is oxidized and another molecule is reduced.
The oxidation number of iron changes from 0 to +2. Thus, it is oxidized. The oxidation number of N changes from -2 to -3. Thus, it is reduced.
(B) Preparation of metals from their ores and production by the lightning of nitrogen oxides from nitrogen and oxygen in the atmosphere are redox reactions or intermolecular redox processes.
(C) Evaporation of water and production by the lightning of O3 from O2 involve physical changes.
The production of O3 from O2 by lightning is the change of an element in one form (oxidation state = 0) to another form (oxidation state = 0) and is also called allotropy.
(D) The reaction of oxalic acid with NaOH is an acid-base reaction or neutralisation reaction.
(COOH)2+2NaOH⇌(COONa)2+2HOH
(E) The reaction 2Mn2O7⟶4MnO2+3O2, is intramolecular redox reaction: One atom of a molecule is oxidised and the other atom is reduced. Th oxidation state of Mn changes from +7 to +4. Thus, it is reduced. The oxidation number of oxygen changes from -2 to 0. Thus, it is oxidized.
(F) The reaction Fe+N2H4→NH3+Fe(OH)2, is redox reaction or intermolecular redox processes. One molecule is oxidized and another molecule is reduced.
The oxidation number of iron changes from 0 to +2. Thus, it is oxidized. The oxidation number of N changes from -2 to -3. Thus, it is reduced.
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