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Plaster of paris is...

Plaster of paris is

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Plaster of paris on losing water and gaining water gives A and b . Identify A and B .

(a). What is plaster of paris? Write the chemical formula of plaster of paris. (b) How is plaster of paris prepared? Write chemical equation of the reaction involved. (c) Explain why plaster of paris should be stored in a moisture-proof container. (d) State two important uses of plaster of paris.

How is gypsum converted into plaster of paris ? Why is plaster of paris helpful in setting broken bones?

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MODERN PUBLICATION-S-BLOCK ELEMENTS ( ALKALI AND ALKALINE EARTH METALS ) -Revision Exercises (Objective/Very Short answer questions(Fill in the blanks) )
  1. Li reacts directly with nitrogen to from lithium nitride.

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  2. Solvay process is used for the manufacturing of

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  3. Alkali metals readily dissolve in liquid ammonia to give blue coloured...

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  4. The ionisation energy of alkali metals decreases from Li to Cs bacause

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  5. Which of the following compound(s) will impart a golden yellow colour ...

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  6. Plaster of paris is

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  7. Assertion (A): Lithium chloride is predominantly covalent compound. ...

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  8. Assertion (A): Na(2)SO(4) is soluble in water while BaSO(4) is insolub...

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  9. Al(OH)(3) is amphoteric is nature. Al-O and O-H bonds can be borken ...

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  10. Assertion: Barium is not required for normal biological function in hu...

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  11. Assertion: Li resembles with Mg in properties Reason: Li^(+) has alm...

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  12. Assertion (A): Alkali metals impart colour to the flame. Reason (R )...

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  13. Assertion (A): Sulphur is estimates as BaSO(4) and not as MgSO(4). R...

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  14. Statement -1: Of the chloride of alkaline earth metals BeCl(2) is cova...

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  15. Be forms [BeF(4)]^(2-), but Al forms [AiF(6)]^(3-). Reason (R ): Be...

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  16. Assertion : K, Rb and Cs can also form superoxides. Reason : Their ...

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  17. Assertion (A): CuCI is more covalent than NaCI. Reason (R ): Na^(o+)...

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  18. Assertion : Be gives characteristic flame colouration. Reason : Ion...

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  19. Assertion (A) Beryllium carbonate is kept in the atomsphere of carbon ...

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  20. Assertion (A) The carbonate of lithium decomposes easily on heating to...

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