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Identify the correct statement...

Identify the correct statement

A

Gypsum contains a lower percentage of Ca than plaster of paris

B

Gypsum is obtained by heating plaster of paris

C

Plaster of paris can be obtained by hydration of gypsum

D

Plaster of paris is obtained by partial oxidation of gypsum

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The correct Answer is:
A
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ALLEN-S-BLOCK ELEMENTS -EXERCISE
  1. When chlorine is passed over dry slaked lime at room temperature, the ...

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  2. The plaster of paris is hardened by

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  3. Identify the correct statement

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  4. When a standard solution of NaOH is left in air for a few hours:

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  5. Which of the following alkali metal carbonate is the least stable and ...

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  6. In the reaction, M + CO(2) to MO(2) (superoixde) the metal M is :

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  7. Addition of NaOH on Zn^(2+) ion gives a white ppt. which on addition o...

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  8. Li does resemble other alkali metals in following properties:

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  9. Be and Al resemble in

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  10. The hydride which doesno't act as reducing agent is

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  11. The correct order of hydration energy of alkaline earth metal ions is

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  12. Na^(+) and Ag^(+) differ in

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  13. Magnesium powder burns in air to give :

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  14. Consider the following points : (a) Cs is the strongest reducing age...

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  15. Mg^(+2) does not form either preoxide or superoxidem because

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  16. The stability order of oxide, peroxide and superoxide of alkalimetal i...

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  17. Match list I with list II and choose the correct answer from the codes...

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  18. Alkali metals forms following compound

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  19. Which alkaline earth metal compound is volatile

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  20. Match the compound(s)/metal(s) in X with their uses in Y {:(X,Y),(A....

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