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(a) Give reasons for the following: (i...

(a) Give reasons for the following:
(i) Sulphurin vapour state shows paramagnetic behaviour.
(ii) N-N bond is weaker than P-P bond.
(iii) Ozone is thermodynamically less stable than oxygen.
(b) Write the name of gas released when Cu is added to:
(i) dilute `HNO_(3)` and,
(ii) conc. `HNO_(3)`

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