11th Class Chemistry The s-Block Elements

  • question_answer 51)   Dead burnt plaster is : (a) \[CaS{{O}_{4}}\]                        (b) \[CaS{{O}_{4}}\cdot \frac{1}{2}{{H}_{2}}O\]  (c) \[CaS{{O}_{4}}\cdot {{H}_{2}}O\]       (d) \[CaS{{O}_{4}}\cdot 2{{H}_{2}}O\]

    Answer:

      (a) \[CaS{{O}_{4}}\] is dead burnt plaster

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