Qualitative Analysis - Result Question 72

####75. Mention the products formed in the following:

(i) Zinc oxide is treated with excess of sodium hydroxide solution.

(ii) Iodine is added to a solution of stannous chloride.

(iii) Sulphur dioxide gas, water vapour and air are passed over heated sodium chloride.

(1986, 3M)

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Solution:

  1. (i) ZnO+2NaOHNa2ZnO2+H2O

(ii) Sn2++I2Sn4++2I

(iii) SO2+H2O+12O2+2NaClNa2SO4+2HCl



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