Question 3(d)Write a balanced chemical equation for each of the following reactions:(i) Magnesium hydrogen carbonate reacts with slaked lime.(ii) Formation of coloured precipitate.(iii) Heating ammonium dichromate.

Question

Question 3(d)Write a balanced chemical equation for each of the following reactions:(i)	Magnesium hydrogen carbonate reacts with slaked lime.(ii) Formation of coloured precipitate.(iii) Heating ammonium dichromate.

Accepted Answer

(i) Magnesium hydrogen carbonate reacts with slaked lime.

Mg(HCO₃)₂ + Ca(OH)₂ ⟶ MgCO₃↓ + CaCO₃↓ + 2H₂O

(ii) Formation of coloured precipitate.

3NaOH + FeCl₃ ⟶ Fe(OH)₃ [reddish brown ppt.] + 3NaCl

(iii) Heating ammonium dichromate.

$\underset{\text{[Ammonium dichromate (orange)]}}{(\text{NH}_4)_2\text{Cr}_2\text{O}_7} \xrightarrow{\space \Delta \space} \underset{\text{ [Chromic oxide(green)]}}{\text{Cr}_2\text{O}_3} + 4\text{H}_2\text{O} + \text{N}_2$

Model Question Paper — 1 — Question 4

Question 3(d)