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What are the main chemical constituents of cement?

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`3CaO . SiO_2, 2CaO . SiO_2 and 3CaO . Al_2O_3`.
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ICSE-THE s - BLOCK ELEMENTS-SHORT ANSWER TYPE QUESTIONS
  1. What is gypsum and what is the effect of heat on it?

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  2. The average composition of portland cement is

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  3. What are the main chemical constituents of cement?

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  4. Give an account of the chemical reactions which take place in the rota...

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  5. Why does cement set to a very hard mass when mixed with water and allo...

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  6. Describe the industrial uses of lime and limestone.

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  7. Why is cement clinker obtained from rotary Kiln mixed with gypsum?

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  8. What do you understand by concrete and RCC ?

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  9. Write three general characteristics of the elements of s-block of the ...

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  10. The alkali metals follow the noble gases in their atomic structure. Wh...

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  11. List three properties of lithium in which it differs from the rest of ...

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  12. What happens when (i) sodium metal is dropped in water? (ii) sodiu...

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  13. What happens when (i) sodium metal is dropped in water? (ii) sodiu...

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  14. What happens when (i) sodium metal is dropped in water? (ii) sodiu...

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  15. When an alkali metal dissolves in liquid ammonia the solution can acqu...

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  16. Why does the following reaction proceed better with KF than with ...

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  17. The average composition of portland cement is

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  18. Differentiate between quicklime and Slaked lime.

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  19. Differentiate between lime and lime-water.

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  20. Differentiate between slaked lime and lime water

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