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A chemical equation has both qualitative and quantitative importance. Justify the statement. `2KClO_3 rarr 2KCl + 3O_2`

The following are two chemical equations. Distinguish between the chemical equations (i) and (ii) KClO_3 rarr KCl + O2 , 2KClO_3 rarr 2KCl + 3O_2

Balance the chemical equation H_2 + O_2 rarr H_2O

Balance the chemical equation H_2 +O_2 rarrH_2O

Classify the given chemical reactions into combination,displacement,decomposition and double dispacement reaction. a) Mg + O_2 rarr 2MgO b) H_2 + I_2 rarr 2HI c) 2H_2O rarr 2H_2 + O_2 d) NaCl + AgNO_3 rarr AgCl + NaNO_3 e) Zn SO_4 + BaCl_2 rarr BaSO_4 + Zn Cl_2 f) Zn + H_2SO_4 rarr ZnSO_4 + H_2 g) FeSO_4 + Zn rarr ZnSO_4 + Fe h) CaCO_3 rarr CaO + CO_2

Some important chemcial equations of reactions taking place in a blast furnace are given below: Fe_2O_3+3COrarr2Fe+3CO_2 , CaCO_3rarrCaO+CO_2 , Cao+SiO_2rarrCaSiO_3 : Select the equation for slag formation.

Bond angle in NH_3 is more than in H_2O . Justify.

Write chemical reactions to justify that H_2O_2 can function as an oxidising as well as reducing agent.