Redox Reactions And Electrochemistry Ques 458

Question: In which reaction there is a change in valency [NCERT 1971; CPMT 1971]

Options:

A) 2NO2,N2O4

B) 2NO2+H2O,,HNO2+HNO3

C) NH4OH,,NH4++OH

D) CaCO3,,CaO+CO2

Show Answer

Answer:

Correct Answer: B

Solution:

2NO2+4,+H2OHNO2+HNO3+5, . In this reaction oxidation state changes.



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