NDA Government Jobs Exams

Deionised water is produced by
(A) Calgon process (B) ion-exchange resin process
(C) Clark's process (D) Permuit process

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NDA Other Question

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 Which one among the following is a double salt ?
(A) K4[Fe(CN)6] (B) K2SO4Al2(SO4)324H2O
(C) CuSO4.5H2O (D) NaCl