1. Chemical Reactions and EquationsDifficult

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$(g)$

$(d)$ Magnestum $(s)$ $+$ Hydrochloric acid$(aq)$ $\rightarrow$ Magnesium chloride$(aq)$ $+$ Hydrogen $(g)$

Solution

$(a)$ $2KB{{r}_{(aq)}}+Ba{{I}_{2(aq)}}\,\to \,2K{{I}_{(aq)}}\,+\,BaB{{r}_{2(s)}}$; Double displacement reaction

$(b)$ $ZnCO _{3(s)} \longrightarrow ZnO _{( s )}+ CO _{2( g )} ;$ Decomposition reaction

$(c)$ $H _{2(g)}+ Cl _{2(g)} \longrightarrow 2 HCl _{( g )} ;$ Combination reaction

$(d)$ $Mg _{(s)}+2 HCl _{(aq)} \longrightarrow MgCl _{2(a q)}+ H _{2(g)}$ ; Displacement reaction

What happens when dilute hydrochloric acid is added to iron fillings ? Tick the correct answer.

Medium

Medium

Medium

Medium

Difficult