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The correct order of hydration enthalpie...

The correct order of hydration enthalpies of alkali metal ions is:

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The correct order of hydration energy of alkaline earth metal ions is

Correct order of ionisation enthalpy is

Write the trend of hydration enthalpies of alkaline earth metal ions.

Write the trend of hydration enthalpies of alkaline earth metal ions.

The correct order of stability of hydrides of alkali metals is

The alkali metals

The alkali metals

Assertion: Lithium salts are mostly hydrated. Reason: The hydration enthalpies of alkalie metal ions decrease with increase in ionic sizes.

The correct order of mobility of alkali metal ions in aqueous solution is

The correct order of mobility of alkali metal ions in aqueous solution is

ICSE-THE s - BLOCK ELEMENTS-TRUE OR FALSE. TYPE QUESTIONS (State whether the following statements are True or False:
  1. The density of alkali metals increases from Li to Cs.

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  2. 'Each alkali metal is the most electropositive element in its period'....

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  3. The correct order of hydration enthalpies of alkali metal ions is:

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  4. Li is used in photoelectric cells.

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  5. K, Rb and Cs form mainly superoxides.

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  6. Why are lithium halides partially covalent ? Explain with examples.

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  7. Inspite of very high ionisation energy, lithium is the strongest reduc...

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

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  9. The densities of alkaline earth metals are much smaller than those of ...

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  10. Why are the second ionisation energies of alkaline earth metals much s...

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  11. Why do alkaline earth metals and their compounds impart characteristic...

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  12. The flame test with a salt P gave a brick red flame. What is the catio...

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  13. Be(OH)2 is

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  14. BaCl2 is a low melting volatile solid.

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  15. Assertion : Among alkaline earth metals, Be predominantly forms covale...

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  16. Why do lithium and sodium not occur in free state in nature ?

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  17. Lithium forms alloys with a number of metals. Why?

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  18. Sodium acts as a strong reducing agent. Why?

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  19. Hydrated magnesium chloride on heating gives magnesium oxide.

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  20. Plaster of Paris is chemically calcium sulphate monohydrate.

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