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In an aquous solution of silver bromide concentration of Ag+ is 1×10-6 mol lit-1. If Ksp for AgBr is
4 x 10-13 then concentration of Br in the solution is

A. 4 x 10-8 mole liter-1

B. 2 x 10-19 mole liter-1

C. 4 x 10-7 mole liter-1

D. 2 x 10-5 mole liter-1

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