Chemistry
The nitrate salt which does not give a mixture of NO2 and O2 on heating is:
- AgNO3
- KNO3
- Cu(NO3)2
- Zn(NO3)2
Nitric Acid
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Answer
KNO3
Reason — The alkali metal nitrates such as sodium or potassium nitrates when heated melts into colourless liquids which decompose on heating to give oxygen gas.
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Related Questions
Write equation for the following conversions A, B, C and D.
Correct the following, if required:
(a) HNO3 is a strong reducing agent.
(b) NaNO3 gives NO2 and O2 on heating.
(c) Constant boiling nitric acid contains 80% nitric acid by weight.
(d) Nitric acid remains colourless even when exposed to light.
(e) Magnesium reacts with nitric acid to liberate hydrogen gas.
The chemical used in the brown ring test is:
- CuSO4
- FeSO4
- Fe2(SO4)3
- ZnSO4
Lead nitrate decomposes on heating to give:
- NO
- N2O
- NO2
- N2O5