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Oxidation and reduction - Jamb Chemistry Past Questions and Answers

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Jamb Chemistry Past Questions

Jamb Past Questions and Answers on Oxidation and reduction

Question 81:


The oxidation state of carbon in HCOOH is

A. -1
B. +2
C. +3
D. Zero

View Answer & Explanation

Question 82:


The oxidation state of Cr in K2Cr2O7 is

A. +7
B. +6
C. +5
D. 4

View Answer & Explanation

Question 83:


The oxidation of ammonia in excess air produces

A. NO
B. N2O
C. NO2
D. N2O4

View Answer & Explanation

Question 84:


Hydrogen sulphide gas can act as

A. An oxidizing agent
B. A dehydrating agent
C. A bleaching agent
D. A precipitating agent

View Answer & Explanation

Question 85:


6AgNO4(aq) + PH3(g) + 3H2O(l) → 6Ag(s) + H3PO3(g) + 6HNO3(aq)
In the above reaction, the reducing agent is

A. HNO3(aq)
B. H2O(l)
C. PH3(g)
D. AgNO3(aq)

View Answer & Explanation



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