NDA Government Jobs Exams

Which one among the following is the equivalent with of sulphuric acid ?
(Atomic weight : H = 1, S = 32, O = 16)
(A) 98 (B) 60 (C) 100 (D) 49

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NDA Other Question

Three elements Na, S and O combine to from a compound Na2SO6. What is the valency of S this compound ?
(A) 2+ (B) 4+ (C) 6+ (D) 8+ Deionised water is produced by
(A) Calgon process (B) ion-exchange resin process
(C) Clark's process (D) Permuit process