Question

Explain What Happens When Following Reaction Take Place And Give The

Balance Chemical Equation (Do any 2)

(i) Potassium chromate solution is added to solution of barium sulphate.

(ii) Sugar is heated

(iii) Iron is added in copper sulphate solution​

Answer 1

(a) Potassium bromide(aq) + Barium iodide(aq) → Potassium iodide(aq) + Barium bromide(s)

2KBr

(aq)

+BaI

2

(aq)

→2KI

(aq)

+BaBr

2

(s)

In this reaction, both the reactants exchanges ions to for two new products, hence, it is a double displacement reaction

(b) zinc carbonate(s) → Zinc oxide(s) + Carbon dioxide(g)

ZnCO

3

(s)

→ZnO

(s)

+CO

2

(g)

In this reaction, a single substance yields two different product. hence, it is a decomposition reaction

(c) Hydrogen(g) + Chlorine(g) → Hydrogen chloride(g)

H

2

(g)

+Cl

2

(g)

→2HCl

(g)

In this reaction, two different reactants react with each other to form a single product. Hence, it is called a combination reaction

(d) Magnesium(s) + Hydrochloric acid(aq) → Magnesium chloride(aq) + Hydrogen(g)

Mg

(s)

+2HCl

(aq)

→MgCl

2

(aq)

+H

2

(g)

In this reaction, more reactive Mg is replacing less reactive H. Hence, it is displacement reaction

so,

I hope you are understand my answer