In which reaction there is a change in valencyA. `2NO_(2) rarr N_(2)O_(4)`B. `NH_(4)OH rarr NH_(4)^(+) + OH^(-)`C. `2NO_(2)+H_(2)O rarr HNO_(2)+HNO_(3)`D. `CaCO_(3) rarr CaO+CO(2)`

In which reaction there is a change in valencyA. `2NO_(2) rarr N_(2)O_

1.	In which reaction there is a change in valencyA. `2NO_(2) rarr N_(2)O_(4)`B. `NH_(4)OH rarr NH_(4)^(+) + OH^(-)`C. `2NO_(2)+H_(2)O rarr HNO_(2)+HNO_(3)`D. `CaCO_(3) rarr CaO+CO(2)`
Answer» Correct Answer - C `overset(+4)(2NO_(2))+H_(2)O rarr HNO_(2)+overset(+5)(HNO_(3))`. In this reaction oxidation state changes.

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In which reaction there is a change in valencyA. `2NO_(2) rarr N_(2)O_(4)`B. `NH_(4)OH rarr NH_(4)^(+) + OH^(-)`C. `2NO_(2)+H_(2)O rarr HNO_(2)+HNO_(3)`D. `CaCO_(3) rarr CaO+CO(2)`

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