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What is meant by setting of cement?...

What is meant by setting of cement?

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When gypsum is added to cement by mixing with an adequate quantity of water, it for plastic mass that gets into a hard solid in 5 to 10 minutes.
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FULL MARKS-ALKALI AND ALKALINE EARTH METALS-Additional Questions Solved
  1. Write a note about alabaster.

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  2. What is dead burnt plaster ?

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  3. What is meant by setting of cement?

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  4. Which is the most abundant metal found in the human body? Explain how ...

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  5. In what ways lithium snows similarities to magnesium in its chemical b...

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  6. Explain why can alkali and alkaline earth metals not be obtained by ch...

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  7. Why are potassium and caesium, rather than lithium used in photochemic...

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  8. Beryllium and magnesium do not give colour to flame whereas other alka...

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  9. Why are lithium salts commonly hydrated and those of the other alkali ...

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  10. Why are alkali metals always univalent? Which alkali metal ion forms l...

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  11. What is the following compounds (Give equations for the reactions)?Wha...

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  12. Explain the following: (a) Lithium iodide is more covalent than lit...

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  13. Why alkali metals are soft and have low melting points?

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  14. Why is LiF almost insoluble in water, whereas LiCl soluble not only in...

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  15. The hydroxides and carbonates of sodium and potassium are easily solub...

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  16. Draw the structure of BeCl(2) in different physical states.

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  17. Why is Li(2)Co(3) decomposed at a lower temperature whereas Na(2)CO(3)...

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  18. . Alkali metals give colouration when heated in Bunsen flame. Give rea...

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  19. How Sodium metal  reacts with (i) ethanol and (ii) acetylene.

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  20. Mention the uses of lithium and its compounds.

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