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99 Percentile Qs Bank for JEE MainChemistryp Block Elements (Group 13 & 14)

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. BCO 2 and CO
  3. CCO and CO 2
  4. DCO 2 and CO 2

Correct answer

D. CO 2 and CO 2

Step-by-step solution

CO 2 + Ca OH 2 ⟶ CaCO 3 ↓ + H 2 O A white ppt CaCO 3 + CO 2 + H 2 O ⟶ Ca HCO 3 2 Calcium bicarbonate (Souble in water) Ca HCO 3 2 ⟶ Heat CaCO 3 + CO 2 + H 2 O B A and B are C O 2 and C O 2 .

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