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Question

A nitrate which does not produce nitrogen dioxide on heating.

A nitrate which does not leave black residue on heating

Dilute nitric acid is considered as a typical acid but not so in its reaction with metals

A metallic nitate that decripitates on heating

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Solution

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  1. Potassium or Sodium nitrate.
2.ammonium nitrate when heated above 170 degree gives water vapour and nitrous oxide as gas and there is no residue

3.Nitric acid is a strong Oxidizing agent, thus when it reacts with metal this acid even oxidizes hydrogen produced to water and itself is reduced to NO gas.

4.

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