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NCERT Class XI Chemistry Hydrogen Solutions

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Question : 20 of 36
Marks: +1, -0
Complete the following chemical reactions.
(i) PbS(s)+H2O2(aq)PbS_(s) + H_2O_{2(aq)} →
(ii) MnO4(aq)−+H2O2(aq){MnO_4}^{-}_{(aq)} + H_2O_{2(aq)} →
(iii) CaO(s)+H2O(g)CaO_(s) + H_2O_(g) →
(iv) AlCl3(g)+H2O(l)AlCl_{3(g)} + H_2O_(l) →
(v) Ca3N2(s)+H2O(l)Ca_3N_{2(s)} + H_2O_(l) →
Classify the above into (a) hydrolysis, (b) redox and (c) hydration reactions.
Solution:  
(i) PbS(s)+H2O2(aq)PbS_(s) + H_2O_{2(aq)} → PbSO4(s)+4H2O(l)PbSO_{4(s)} + 4H_2O_(l)
(ii) MnO_4^{–}_(aq) + H_2O_{2(aq)} → 2Mn(2+aq)+8H2O(l)+5O2(g)2Mn^{2+}_(aq)+8H_2O_(l)+5O_{2(g)}
(iii) CaO(s)+H2O(g)CaO_(s) + H_2O_(g) → Ca(OH)2(aq)Ca(OH)_{2(aq)}
(iv) AlCl3(g)+H2O(l)AlCl_{3(g)} + H_2O_(l) → Al(OH)3(s)+3HCl(l)Al(OH)_{3(s)} + 3HCl_(l)
(v) Ca3N2(s)+H2O(l)Ca_3N_{2(s)} + H_2O_(l) → 3Ca(OH)2(aq)+2NH3(g)3Ca(OH)_{2(aq)}+2NH_{3(g)}
Redox reaction : (i) and (ii)
Hydration reaction : (iii)
Hydrolysis reaction : (iv) and (v)
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