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  4. the s block elements

the s block elements


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

(a) MgCO3  

(b) CaCO3  

(c) SrCO3 

(d) BaCO3

class-11 chemistry the s block elements
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Which one of the following alkali metals gives hydrated salts?

(a) Li  

(b) Na  

(c) K  

(d) Cs

class-11 chemistry the s block elements
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Which of the following alkali metals has the least melting point?

(a) Na  

(b) K  

(c) Rb  

(d) Cs

class-11 chemistry the s block elements
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How would you explain the following observations?

(i) BeO is almost insoluble but BeSO4 is insoluble in water.

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

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

class-11 chemistry the s block elements
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Write balanced equations for reactions between:

(a) Na2O2 and water

(b) KO2 and Water

(c) Na2O and CO2

class-11 chemistry the s block elements
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