p-Block elementsHard
Question
Which of the following statement(s) is / are correct ?
Options
A.Nitrogen (IV) oxide in basic aqueous solution disproportionates.
B.Sodium nitrate and lead nitrate each on heating to 800oC decomposes liberating both NO2 and O2 gases.
C.Ammonia and sodium hypochlorite react in dilute aqueous solutions in presence of gelatin and liberate nitrogen gas.
D.Hydrogen peroxide is produced on large scale by the auto oxidation of 2-ethyl anthraquinol.
Solution
(A) In basic solution NO2 disproportionates into N(III) and N(V), forming NO2- and NO3- ions.
2NO2 (aq) + 2OH- (aq) → NO2- (aq) + NO3- (aq) + H2O(l).
(B) 4NaNO3
2Na2O + 5O2 + 2N2
2Pb(NO3)2
2PbO + 4NO2 + O2
(C) NH3(aq) + NaOCl (aq)
NH2Cl2 (aq) + NaOH (aq)
(dilute solutions)
2NH3(aq) + NH2Cl2 → N2H4 (aq) + NH4Cl
(D)
+ H2O2
2NO2 (aq) + 2OH- (aq) → NO2- (aq) + NO3- (aq) + H2O(l).
(B) 4NaNO3
2Na2O + 5O2 + 2N2 2Pb(NO3)2
2PbO + 4NO2 + O2 (C) NH3(aq) + NaOCl (aq)
NH2Cl2 (aq) + NaOH (aq) (dilute solutions)
2NH3(aq) + NH2Cl2 → N2H4 (aq) + NH4Cl
(D)
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