Name nitrate of metal which on heating does not give nitrogen dioxide.

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Solution

The alkali metal potassium on heating does not give nitrogen dioxide.
Potassium nitrate will decompose into metal nitrate and oxygen gas.
Hence potassium nitrate (KNO₃) does not form nitrogen dioxide on heating.
$\underset{Potassium nitrate}{2 {KNO}_{3} (s)} \overset{∆}{\to} \underset{Potassium nitrite}{2 {KNO}_{2} (s)} + \underset{Oxygen}{O_{2} (g)}$
Another example is sodium nitrate
$\underset{}{\underset{sodium nitrate}{2 {NaNO}_{3} (s)}} \overset{∆}{\to} \underset{}{\underset{sodium nitrite}{2 {NaNo}_{2} (s)}} + \underset{}{\underset{oxygen}{O_{2} (g)}}$

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