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Q.3       Write the formula of the following compounds.                            3
                     a) Magnesium Sulphate
                     b) Calcium sulphite
                     c) Sodium phosphate
                         a)
           Q.4       Write the names of the following compounds.                              3
                     a) MgCO3
                     b) Al2O3
                     c) Fe2(SO4)3
           Q.5       Write the formula of the compounds and the ions present in the           5
                     following compounds.
                     a) Calcium nitrite
                     b) Ammonium sulphate
                     c) Potassium phosphate






























































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