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8.The equivalent weight of a certain trivalent element is 20. Molecular weight of its oxide is(1) 168(2) 68(3) 152(4)56 |
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Answer» Option 1Equivalent weight is defined as the weight of an element which combines or replaceswith 8 part of oxygen.so equivalent weight of trivalent is = 20so 20 gm of element combines with 8 gm of oxygen.formula is M2O3 = 2x+ 48 = molecular wt8 gm of O2 combines with = 20 gm of element48 gm of O2 will combines with = 20x48/8 = 120so moecular wt = 120 + 48 = 168 The Answer of question is 56 |
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