Chemistry
Heating of zinc nitrate is a …………… reaction.
- Displacement
- Combination
- Decomposition
- Redox
Chemical Reaction
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Answer
Decomposition reaction
Reason — Zinc nitrate undergoes thermal decomposition and produces reddish brown Nitrogen dioxide gas (NO2), Zinc oxide (ZnO), and Oxygen gas (O2).
It can't be displacement as no element is replacing another. In combination, substances combine to form one product, which is the opposite here. Redox reaction does involve oxidation and reduction, but the question is asking for the type of reaction.
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Related Questions
State the type of reactions each of the following represent and balance the ones that are not balanced.
(a) Cl2 + 2KBr ⟶ 2KCl + Br2
(b) NaOH + HCl ⟶ NaCl + H2O
(c) 2HgO ⟶ 2Hg + O2 ↑
(d) Fe + CuSO4 ⟶ FeSO4 + Cu
(e) PbO2 + SO2 ⟶ PbSO4
(f) 2KClO3 ⟶ 2KCl + 3O2 ↑
(g) 2H2O2 ⟶ 2H2O + O2 ↑
(h) KNO3 + H2SO4 ⟶ HNO3 + KHSO4
(i) CuO + H2 ⟶ Cu + H2O
(j) CaCO3 ⟶ CaO + CO2 ↑
(k) NH4Cl ⟶ NH3 + HCl
(l) PbO + 2HNO3 ⟶ Pb(NO3)2 + 2H2O
(m) AgNO3 + NaCl ⟶ AgCl ↓ + NaNO3
Which of the of following is not a chemical change.
- Rusting of iron
- Iron is magnetised
- Potassium is dissolved in water
- Magnesium wire is burnt
Burning of a metal is an example of :
- Decomposition reaction
- Combination reaction between an element and a compound
- Direct combination reaction between two elements
- Displacement reaction
Formation of white precipitate on mixing sodium chloride solution and silver nitrate solution is an example of …………… reaction.
- Combination
- Decomposition
- Displacement
- Double decomposition