Write the balanced chemical equation for the following and identify the type of reaction in each case.
(a) Potassium bromide(aq) + Barium iodide(aq) \(→\) Potassium iodide(aq) + Barium bromide(s)
(b) Zinc carbonate(s) \(→\) Zinc oxide(s) + Carbon dioxide(g)
(c) Hydrogen(g) + Chlorine(g) \(→\) Hydrogen chloride(g)
(d) Magnesium(s) + Hydrochloric acid(aq) \(→\) Magnesium chloride(aq) + Hydrogen(g)

Question

Which of the statements about the reaction below are incorrect?
\(\text{ 2PbO(s) + C(s) → 2Pb(s) + C}O_2\text{(g)}\)
(a) Lead is getting reduced.
(b) Carbon dioxide is getting oxidized.
(c) Carbon is getting oxidized.
(d) Lead oxide is getting reduced.

Answer 1

(a) Potassium bromide in aqueous solution reacts with barium iodide in aqueous solution to produce potassium iodide in aqueous solution and solid barium bromide. This is a double displacement reaction.
(b) Solid zinc carbonate decomposes to form solid zinc oxide and carbon dioxide gas. This is a decomposition reaction.
(c) Gaseous hydrogen reacts with gaseous chlorine to form gaseous hydrogen chloride. This is a combination reaction.
(d) Solid magnesium reacts with aqueous hydrochloric acid to produce aqueous magnesium chloride and hydrogen gas. This is a displacement reaction.

Solution and Explanation

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