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Sodium fire in the laboratory should not...

Sodium fire in the laboratory should not be extinguished by using water. Why ?

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DINESH PUBLICATION-S-BLOCK ELEMENTS (ALKALI AND ALKALINE EARTH METALS )-CONCEPT BASED QUESTIONS
  1. Sodium salts in aqueous solution are either neutral or alkaline in nau...

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  2. Among the alkali metal halides, lattice enthalpy is maximum for LiF an...

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  3. Sodium fire in the laboratory should not be extinguished by using wate...

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  4. Beryllium chloride fumes in air.

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  5. Mg^(2+) ion more highly hydrated than Na^(+) ion.

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  6. The crystalline salts of alkaline earth metals contain more water of c...

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  7. Assertion (A): Na(2)SO(4) is soluble in water while BaSO(4) is insolub...

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  8. Sodium cannot be obtained by the electrolysis of aqueous solution of N...

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  9. Hydrated magnesium chloride cannot be dehydrated by heating.

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  10. Calcium is generally preferred over sodium to remove traces of water f...

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

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  12. The crystalline salts of alkaline earth metals contain more water of c...

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  13. The enthalpy of formation of hypothetical CaCl(s) is found to be - 180...

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  14. Complete the following : (i) CaSO(4). 2H(2)O overset("heat")(to) ...

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  15. Complete and balance the following equations. (i) KO(2) + H(2) O to ...

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  16. Give the names and formulae of the compounds indicated by the followin...

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  17. A white solid (x) when heated evolves a colourless gas which does not ...

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  18. A is a binary compound of a univalent metal. When 1.422 g of A reacts ...

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  19. 0.2g of magnesium ribbon was placed in a crucible and heated with lid ...

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  20. Which of the following statements are not correct? Rectify them. (a)...

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