Complete and balance the following chemical equations:
(i) NaOH(aq) + Zn(s)→
(ii) CaCO3(s) + H2O(l) + CO2(g)→
(iii) HCl(aq) + H2O(l)→
OR
During electrolysis of brine, a gas ‘G’ is liberated at anode. When this gas ‘G’ is passed through slaked lime, a compound ‘C’ is formed, which is used for disinfecting drinking water.
(i) Write formula of ‘G’ and ‘C’.
(ii) State the chemical equation involved.
(iii) What is common name of compound ‘C’? Give its chemical name.
CaCO3 + H2O → Ca(HCO3)2
HCl + H2O → H3O+ + Cl–
OR
(i) G is Cl2
C is CaOCl2
(ii) Cal(OH)2 + Cl2→ CaOCl2 + H2O
Calcium Chlorine Calcium oxy chloride Water
(iii) Bleaching Powder
Chemical name: Calcium chlorite.
Or
Calcium oxy-chloride.
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