Q50 of 72 Page 96

Explain why ozone is thermodynamically less stable than oxygen.

ozone is thermodynamically less stable because it decompose into oxygen and this decomposition leads result in the liberation of heat, so its entropy is positive and free energy is negative. High concentration of oxygen is dangerously explosive.


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48

In the ring test of NO3– ion, Fe2+ ion reduces nitrate ion to nitric oxide, which

combines with Fe2+ (aq) ion to form brown complex. Write the reactions involved in the formation of brown ring.


 49

Explain why the stability of oxoacids of chlorine increases in the order given below:

HClO< HClO2< HClO3< HClO4


 51

P4O6 reacts with water according to equation P4O6 + 6H2O → 4H3PO3.

Calculate the volume of 0.1 M NaOH solution required to neutralise the acid formed by dissolving 1.1 g of P4O6 in H2O.


 52

White phosphorus reacts with chlorine and the product hydrolyses in the presence of water. Calculate the mass of HCl obtained by the hydrolysis of the product formed by the reaction of 62 g of white phosphorus with chlorine in the presence of water.