Chemistry
Differentiate between Displacement reaction & a neutralization reaction.
Chemical Reaction
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Difference between displacement reaction & a neutralization reaction:
| Displacement reaction | Neutralization reaction |
|---|---|
| It is a chemical reaction in which an element placed higher in the activity series displaces the element placed below it from a solution of its compound. | It is a reaction between two compounds - base and acid to give two new compounds - salt and water by interchange of radicals. |
| Example: Zn + CuSO4 ⟶ ZnSO4 + Cu | Example: NaOH + HCl ⟶ NaCl + H2O |
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State why a direct combination reaction is called a - 'synthesis reaction'.
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Classify the following reactions into
(a) Direct combination
(b) Decomposition
(c) Displacement
(d) Double decomposition
The reactions are
(i) Zinc hydroxide on heating gives zinc oxide & water
(ii) Zinc reacts with copper [II] sulphate to give zinc sulphate & copper
(iii) Zinc sulphate reacts with ammonium hydroxide to give ammonium sulphate & zinc hydroxide
(iv) Molten zinc at high temperatures, burns in air to give zinc oxide.
Give balanced equations for -
(i) A direct combination reaction involving two elements, one of which is a non-metal.
(ii) A thermal decomposition reaction involving heat on limestone [calcium carbonate].
(iii) An electrolytic decomposition reaction involving a neutral liquid.
(iv) A displacement reaction involving a metal above hydrogen in the activity series with copper [II] sulphate solution.
(v) A double decomposition neutralization reaction involving an acid & a base.
(vi) A white precipitate obtained during a double decomposition reaction involving a silver salt with a sodium salt.