and "Reason" (R) Type questions. Use the following Key to choose the appropriate answer. If both and (R) are true, and (R) is the correct explanation of . and (R) are true but (R) is not the correct explanation of . is true but (R) is false is false but (R) is true. (i) Assertion: The number of O atoms in 16 g of oxygen and 16 g of ozone is same. Reason: Each of the species represent 1 g-atom of oxygen. (ii)Assertion: 1 mole of sulphuric acid contains 32 g each of sulphur and oxygen element. Reason: 1 mole of sulphuric acid represents 98 g of the species. (iii)Assertion: 1 mole of H 2 SO 4 is neutralised by 2 moles of NaOH but 1 equivalent of H 2 SO 4 is neuralised by 1 equivalent of NaOH. Reason: Equivalent wt. of H 2 SO 4 is half of its moleculer wt. while equivalent wt. of NaOH is 40. (iv) Assertion : 1 Avogram is equal to 10 amu. Reason : Avogram is reciprocal of Avogadro number. (v) Assertion : The ash produced by burning Mg in air is lighther than the original mass of Mg. Reason : Mg burns in air to produce MgO 2 and Mg 3 N 2

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