Q. 32

Complete the following equations:

(i) PbS (s) + H2O2 (aq)

(ii) CO (g) + 2H2 (g)

Answer :

(i) This is an example of a redox reaction. Here, hydrogen peroxide is acting as an oxidising agent, due to which PbS (oxidation state of S is -2) is oxidised to PbSO4(oxidation state of S is +6) and H2O2(oxidation state of O is -1). itself gets reduced to H2O(oxidation state of O is -2).

(ii) This reaction yields methanol at 340K

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