Chemistry
Classify the following reactions as combination, decomposition, displacement, precipitation and neutralization. Also balance the equations. (a) CaCO<sub>3</sub> (s) CaO (s) + CO<sub>2</sub> (g) (b) Zn(s) + H<sub>2</sub>SO<sub>4</sub> ZnSO<sub>4</sub> (s) + H<sub>2</sub> (g) (c) AgNO<sub>3</sub> (aq) + NaCl (aq) AgCl(s) + NaNO<sub>3</sub> (d) NH<sub>3</sub> (g) + HCl (g) NH<sub>4</sub>Cl (s) (e) CuSO<sub>4</sub> (aq) + H<sub>2</sub>S (g) CuS (s) + H<sub>2</sub>SO<sub>4</sub> (l) (f) Zn (s) + CuSO<sub>4</sub> (aq) ZnSO<sub>4</sub> (aq) + Cu(s) (g) Ca(s) + O<sub>2</sub> (g) CaO(s) (h) NaOH + HCl NaCl + H<sub>2</sub>O (i) KOH + H<sub>2</sub>SO<sub>4</sub> K<sub>2</sub>SO<sub>4</sub> + H<sub>2</sub>O
Answer
(a) Decomposition reaction
(b) Displacement reaction
(c) Precipitation reaction
(d) Combination reaction
(e) Precipitation reaction
(f) Displacement reaction
(g) Combination reaction
Balanced Equation:
2Ca(s) + O2 (g) ⟶ 2CaO(s)
(h) Neutralization reaction
(i) Neutralization reaction
Balanced Equation:
2KOH + H2SO4 ⟶ K2SO4 + 2H2O
Related Questions
Name the following :
(a) The substances formed due to a chemical reaction.
(b) An insoluble solid produced when two substances in solution form are mixed together.
(c) The compounds formed by the reaction between oxygen and any other element.
(d) The chemical reactions in which energy is released.
(e) A chemical reaction in which a substance breaks to give two or more simpler substances.
Give one example for each of the following :
(a) An oxide which gives salts both with an acid and a base.
(b) An oxide which does not change the colour of indicators.
(c) A neutral oxide which is a universal solvent.
(d) An oxide which produces salt and water with an acid.
(e) A soluble metallic oxide which produces an alkali.
State the effect of the following on the surroundings:
(a) an endothermic reaction
(b) an exothermic reaction