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what is effect of heat on the following compounds? (Give equations for the reactions)
(i) `CaCO_(3)` (ii) `CaSO_(4) 2H_(2)O`

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(i) `CaCO_(3) overset("heat")(to) CaO + CO_(2)` (decompostion / calcinations)
(ii) `2CaSO_(4). 2H_(2)O underset("strongly")overset("heat")(to) (CaSO_(4)) underset("Plaster of paris")(("Dead burnt plaster")) + 2H_(2) O + 3H_(2) O`
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SUBHASH PUBLICATION-S-Block Elements-Two marks questions and answers
  1. What is the action of alkali metals with water?

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  2. Give one important uses of following compounds. (i) NaHCO(3) (ii) Slak...

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  3. what is effect of heat on the following compounds? (Give equations for...

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  4. What is the action of alkali metals with hydrogen?

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  5. What happeas when alkali metals react with halogens?

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  6. What happens when sodium carbonate undergoes hydrolysis?

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  7. Describe in brief the manufacture of caustic soda using the castner-ke...

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  8. Compare four properties of alkali metals and alkali earth metals.

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  9. Sodium hydroxide is a deliquescent in nature. Why?

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

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

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

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

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  14. How to prepare calcium oixde (CaO)?

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  15. What are the properties of calcium oxide?

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

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

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

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

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

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