(a) Give reasons : 

(i) Helium does not form compounds like Xenon.

(ii) HClO_{4} is a stronger acid than HOCl.

(iii) Sulphur is a polyatomic solid whereas Oxygen is a diatomic gas.

(b) Write one reaction as an example of each, to show that conc.H_{2}SO_{4} acts as

(i) an oxidising agent, and

(ii) a dehydrating agent.

 

 
 
 
 
 

Answers (1)
S safeer

a) i) Helium does not form compounds like Xenon due to high ionization enthalpy

ii)  HClO_{4} is a stronger acid than HOCl because of higher oxidation state of Cl in HClO4 than in HOCl

iii) Sulphur is a polyatomic solid whereas Oxygen is a diatomic gas because oxygen can form pπ- pπ multiple bond effectively but sulphur can not.

b)

i)

 Cu + 2H_{2}SO_{4} \rightarrow CuSO_{4} + SO_{2} + 2H_{2}O

ii) 

C_{12}H_{22}O_{11} \overset{H_{2}So_{4}}{\rightarrow} 12C + 11H_{2}O

 

 

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