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Write the average composition of Portlan...

Write the average composition of Portland cement.

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Composition of port land cement is `CaO-50-60%`
`Sio_2-20-25%`
`Al_2O_3-5-10%`
`MgO-2-3%`
`Fe_2O_3-1-2%`
and `So_2 -1 -2%`
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VIKRAM PUBLICATION ( ANDHRA PUBLICATION)-THE S-BLOCK ELEMENTS -VERY SHORT ANSWER QUESTIONS
  1. Tell about the variation of m. pts., and b.pts among the alkaline eart...

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  2. What are the characteristic colours imparted by the II A elements?

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  3. What happens when magnesium metal is burnt in air?

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  4. Lithium carbonate is not so stable to heat as the other alkali metal c...

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  5. Write a balanced equation for the formation of ammoniated IIA metal io...

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  6. The fluorides of alkaline earth metals are relatively less soluble tha...

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  7. What happens when hydrated Mg(NO3)(2) is heated? Give the balanced equ...

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  8. Why does the solubility of alkaline earth metal hydroxides in water in...

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  9. Why does the solubility of alkaline earth metal carbonates and sulphat...

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  10. Write the average composition of Portland cement.

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  11. Why is gypsum added to cement?

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  12. Why are alkali metals not found in the free state in nature?

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  13. Potassium carbonate cannot be prepared by Solvey process. Why?

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  14. Describe the important uses of caustic soda.

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  15. Describe the important uses of sodium carbonate.

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  16. Describe the important uses of quick lime.

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  17. Draw the structure of (i) BeCl(2) (vapour) and (ii) BeCl(2) (solid).

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  18. Describe the importance of Plaster of Paris.

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  19. Which of the alkaline earth metal carbonate is thermally the most stab...

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  20. Write balanced equations for the reaction between (i) Na2O2 and water ...

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