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Question

Name: [5 MARKS]
(a) a nitrate of metal which on heating does not give nitrogen dioxide.
(b) a nitrate which on heating leaves no residue behind.
(c) a metal nitrate which on heating is changed into metal oxide.
(d) a metal nitrate which on heating is changed into metal.
(e) a solution which absorbs nitric oxide.

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Solution

Each Part: 1 Mark

a) Sodium nitrate, NaNO3. It does not give NO2 on heating.
2NaNO3Δ 2NaNO2+O2

(b) Ammonium nitrate, NH4NO3 on heating does not give any residue.
NH4NO3Δ2H2O+N2O

(c) Copper nitrate, Cu(NO3)2 on heating gives CuO and NO2.
2(CuNO3)2Δ 2CuO+4NO2+O2

(d) Silver nitrate, AgNO3 on heating gives Ag, NO2 and O2.
2AgNO3Δ 2Ag+2NO2+O2

(e) Iron(III) sulphate (FeSO4) absorbs NO.
FeSO4+NOFeSO4.NO

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