1. Plaster of Paris is a white powder and on mixing with water, it changes to gypsum giving a hard solid mass. 𝐶𝑎𝑆𝑂₄.1/2𝐻2𝑂+3/2H₂ 𝑂 → 𝐶𝑎𝑆𝑂₄.2𝐻₂𝑂

    Plaster of Paris is a white powder and on mixing with water, it changes to gypsum giving a hard solid mass.

    𝐶𝑎𝑆𝑂₄.1/2𝐻2𝑂+3/2H₂ 𝑂 → 𝐶𝑎𝑆𝑂₄.2𝐻₂𝑂

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  2. When a solution of sodium hydrocarbonate is heated, sodium carbonate and water are formed with the evolution of carbon dioxide gas. 2NaHCO₃ → Na₂CO3 + H2O + CO2

    When a solution of sodium hydrocarbonate is heated, sodium carbonate and water are formed with the evolution of carbon dioxide gas.

    2NaHCO₃ → Na₂CO3 + H2O + CO2

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  3. Washing soda (Na₂CO₃.10H₂O) is used for softening hard water. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-2/

    Washing soda (Na₂CO₃.10H₂O) is used for softening hard water.

    For more answers visit to website:
    https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-2/

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  4. Calcium hydroxide [Ca(OH)₂], on treatment with chlorine Cl₂, yields bleaching powder. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-2/

    Calcium hydroxide [Ca(OH)₂], on treatment with chlorine Cl₂, yields bleaching powder.

    For more answers visit to website:
    https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-2/

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  5. The common name of the compound CaOCl₂ is bleaching powder. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-2/

    The common name of the compound CaOCl₂ is bleaching powder.

    For more answers visit to website:
    https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-2/

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