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What is dead burnt plaster? How is it ob...

What is dead burnt plaster? How is it obtained from gypsum?

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`CaSO_(4)` is called dead burnt plaster. It is obtained by heating gypsum at high temperature.
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SUBHASH PUBLICATION-S-Block Elements-Two marks questions and answers
  1. Sodium hydroxide is a deliquescent in nature. Why?

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  2. How to prepare sodium bicarbonate (baking soda) from sodium carbonate?

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  3. What is dead burnt plaster? How is it obtained from gypsum?

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  4. What is used for drying alcohol and non-acidic gases and why?

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  5. what are the biological importance of sodium and potassium.

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  6. How to prepare calcium oixde (CaO)?

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  7. What are the properties of calcium oxide?

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  8. Which metals is present in chlorophyll? How does this metals react wit...

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  9. Name an alkali metal carbonate which is thermally ustable and why? Giv...

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  10. Why are ionic hydrides of only alkali metals and alkaline earth metals...

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  11. Which one of the alkaline earth metals carbonate is thermally most and...

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  12. Which out of LI, Na, K, Be, Mg, Ca has lowest ionization enthalpy and ...

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  13. Which alkali metal ion forms largest hydrate ion in aqueous solution a...

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  14. What is responsible for the blue colour of the solution of alkali meta...

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  15. Heat of Hydration of Na^(+) (size 102 Pm) = - 397J Kj mol^(-1) whereas...

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  16. Discuss the diagonal relationship of Be and AI with regard to (i) acti...

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  17. How to prepare calcium carbonate (Lime stone) from slaked lime ?

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  18. Explain the biological importance of magnesium and calcium.

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  19. Lithium is kept wraped in parafin wax not stored in kerosene oil. Why?

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  20. When lithium is heated in air mainly forms the monoxide and not peroxi...

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