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JEE Main
Exam
JEE Main
Subject
Chemistry
Chapter
p Block Elements (Group 13 & 14)

JEE Main · Chemistry · p Block Elements (Group 13 & 14)

Gas A is bubbled through slaked lime when a white precipitate is...

Gas A is bubbled through slaked lime when a white precipitate is formed. On prolonged bubbling the precipitate is dissolved. On heating the resultant solution, the white precipitate reappears with evolution of gas B. The gases A and B respectively are

Options

  1. ACO and CO
  2. BCO2{CO}_{2} and CO
  3. CCO and CO2{CO}_{2}
  4. DCO2{CO}_{2} and CO2{CO}_{2}

Correct answer

D. CO2{CO}_{2} and CO2{CO}_{2}

Step-by-step solution

{CO2+Ca(OH)2⟶CaCO3↓+H2O(A)white ppt\begin{cases}{CO}_{2} & + & \text{Ca} {\left(\text{OH}\right)}_{2} & ⟶ & {CaCO}_{3} & ↓ + & {H}_{2} \text{O} \\ \left(\text{A}\right) & & & & \text{white ppt} & & \end{cases}

{CaCO3+CO2+H2O⟶Ca(HCO3)2Calcium bicarbonate (Souble in water)\begin{cases}{CaCO}_{3} & + & {CO}_{2} & + & {H}_{2} \text{O} & ⟶ & \text{Ca} {\left({HCO}_{3}\right)}_{2} \\ & & & & & & \text{Calcium bicarbonate (Souble in water)}\end{cases}

{Ca(HCO3)2⟶HeatCaCO3+CO2+H2O(B)\begin{cases}\text{Ca} {\left({HCO}_{3}\right)}_{2} & \overset{Heat}{⟶} & {CaCO}_{3} & + & {CO}_{2} & + & {H}_{2} \text{O} \\ & & & & \left(\text{B}\right) & & \end{cases}

A and B are CO2C{O}_{2} and CO2C{O}_{2} .
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