An element E forms the following compounds with hydrogen and oxygen.
(a)H2E (b)EO2 (c)EO3
write the valency of E in all the three cases
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Answer:(a) Valency of E = -2 (H2O)
(b). Valency of E = +4. (SO2)
(c) Valency of E = +6 (SO3)
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