Premium Online Home Tutors
3 Tutor System
Starting just at 265/hour

Write the balanced chemical equation for the following and identify the type of reaction in each case


  • (a) Potassium bromide (aq) + Barium iodide (aq) \(\rightarrow \) Potassium iodide (aq) + Barium bromide(s)
  • (b) Zinc carbonate(s) \(\rightarrow \) Zinc oxide(s) + Carbon dioxide(g)
  • (c) Hydrogen(g) + Chlorine(g) \(\rightarrow \) Hydrogen chloride(g)
  • (d) Magnesium(s) + Hydrochloric acid(aq) \(\rightarrow \) Magnesium chloride(aq) + Hydrogen(g)


Answer :

$$ (a) \;\;\; 2KBr(aq) + BaI_{2}(aq) $$

$$ \downarrow$$

$$ \;\;\; 2KI(aq) + BaBr_{2} $$


It is a Double Decomposition Reaction.
This is a type of chemical change in which two compounds in a solution react to form two new compounds by mutual exchange of radicals.It is also called double displacement reaction.

$$(b) ZnCO_{3}(s) \rightarrow ZnO(s) + CO_{2}(g) $$
It is Decomposition reaction.
The chemical reaction in which a compound splits into two or more simpler substances (elements or compounds) is called decomposition reaction.

$$(c) H_{2}(g) + Cl_{2}(g) \rightarrow 2HCl $$
It is a Direct Combination reaction.
A reaction in which two or more substances combine together to form a single substance is called a combination reaction or synthesis.

$$(d) \;\;\; Mg(s) + 2HCl(aq) $$

$$ \downarrow$$

$$ \;\;\; MgCl_{2} (aq) + H_{2}(g) $$


It is a Displacement reaction.
It is a chemical change in which a more active element displaces a less active element from its salt solution.

NCERT solutions of related questions for Chemical Reactions and Equations

NCERT solutions of related chapters class 10 maths

NCERT solutions of related chapters class 10 science