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Which of the following nitrates does not give `NO_(2)` on heating ?
A. `Cu(NO_(3))_(2)`
B. `KNO_(3)`
C. `Ca(NO_(3))_(2)`
D. `Zn(NO_(3))_(2)`

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Best answer
`KNO_(3)` on heating give only `O_(2)`.
`2KNO_(3) overset(Delta)to2KNO_(2)+O_(2)`

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