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Soaps do not work in hard water containi...

Soaps do not work in hard water containing calcium and magnesium ions because

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ICSE-THE s - BLOCK ELEMENTS-FILL IN THE BANKS. TYPE QUESTIONS
  1. Alkali metals are kept under ........because they are highly........an...

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  2. When heated in oxygen, lithium forms........, sodium forms......., whi...

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  3. LiF is..........in water due to its high.........energy.

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  4. Why is the solution of an alkali metal in ammonia blue?

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  5. Lithium exhibits diagonal relationship with

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  6. The first ionisation enthalpies of the alkline earth metals are higher...

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  7. The right order of the solubility of sulphates of alkaline earth metal...

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  8. BeO possesses a........ lattice with coordination number of ……………. .

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  9. Arrange the following in the order of property mentioned. Be(OH)2, M...

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  10. The violet flame shown by potassium in bunsen flame is due to jumping ...

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  11. The formula of the ore sylvine is ..........

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  12. When sodium is dissolved in liquid ammonia, a solution of deep blue co...

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  13. Sodium-lead alloy is used in the preparation of which is used as an .....

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  14. The formula of dolomite is ................

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  15. Soaps do not work in hard water containing calcium and magnesium ions ...

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  16. Lithium is found to occur in the ashes of plants such as .......... .

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  17. Lithium is softer than ...... but harder than other alkali metals.

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  18. On passing CO2 through a concentrated aqueous solution of Na2CO3, ………...

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  19. Keiserite is an ore of ...... and has the composition.

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

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