Redox Reactions - Result Question 17
####19. Which substance serves as a reducing agent in the following reaction?
[1994] $14 H^{+}+Cr_2 O_7^{2-}+3 Ni \to 2 Cr^{3+}+7 H_2 O+3 Ni^{2+}$
(a) $H_2 O$
(b) $Ni$
(c) $H^{+}$
(d) $Cr_2 O_7^{2-}$
Topic 4: Electrode Potential and Oxidising, Reducing Agents
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Solution:
- (b) The element undergo oxidation itself and reduces others is known as reducing agent. In this reaction O. N. of Ni Changes from 0 to +2 and hence $Ni$ acts as a reducing agent.
