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An aqueous solution of a salt turns blue litmus to red. The salt could be the one obtained by the reaction of :
Five solutions A, B, C, D and E when tested with pH paper showed pH as 4, 1, 13, 7 and 10 respectively. Which solution is : (1) Strongly acidic (2) Strongly alkaline (3) Weakly acidic (4) Neutral and (5) Weakly alkaline ? Arrange the solutions in increasing order of H⁺ ion concentration.
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