JEE Main & Advanced Chemistry Hydrogen & Its Compounds Question Bank Water or hydride of oxygen

  • question_answer Temporary hardness may be removed from water by adding [Pb. PMT 2002]

    A) \[CaC{{O}_{3}}\]

    B) \[Ca{{(OH)}_{2}}\]

    C) \[CaS{{O}_{4}}\]

    D) HCl

    Correct Answer: B

    Solution :

    \[Ca{{(HC{{O}_{3}})}_{2}}+Ca{{(OH)}_{2}}\to \underset{\text{ppt}\text{.}}{\mathop{2CaC{{O}_{3}}\downarrow }}\,+4{{H}_{2}}O\]

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