Q31 of 39 Page 305

Which one of the following alkali metals gives hydrated salts?

⇒ As we know that smaller the size of an ion is, more highly it is hydrated.


⇒ Among alkali metal ions, Li+ is the smallest. Therefore, it has the high charge density and high polarising power.


⇒ Li+ ion attracts the water molecules than any other alkali metal cation.


⇒ Thus, option (A) is correct.

More from this chapter

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28

Write balanced equations for reactions between

(a) Na2O2 and water


(b) KO2 and water


(c) Na2O and CO2.

 29

How would you explain the following observations?

(i) BeO is almost insoluble but BeSO4 is soluble in water,


(ii) BaO is soluble but BaSO4 is insoluble in water,


(iii) LiI is more soluble than KI in ethanol.

 30

Which of the alkali metal is having least melting point?

 32

Which one of the alkaline earth metal carbonates is thermally the most stable?