1.

what is the oxidation number of Ca in CaSO4?

Answer» Oxidation no. Of ca is+2
Oxidation of O is -2 (4×-2= -8)Oxidation of S is 6 (6×1 = 6)Let oxidation of ca x then Total is zero x+6-8 =0Or x= 2
In CaSO4 , oxidation number of Ca is +2
+2is the oxidation number of ca in caso4


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