KVPY Government Jobs Exams

The number of moles of Br2 produced when two moles of potassium permanganate are treated with excess potassium bromide in aqueous acid medium is
option
(A) 1
(B) 3
(C) 2
(D) 4

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KVPY Other Question

Upon mixing equal volumes of aqueous solutions of 0.1 M HCl and 0.2 M H2SO4, the concentration of H+ in the resulting solution is
option
(A) 0.30 mol/L
(B) 0.25 mol/L
(C) 0.15 mol/L
(D) 0.10 mol/L Let a, b, x, y be real numbers such that a^2 + b^2 = 81, x^2 + y^2 = 121 and ax + by = 99. Then the set of all possible values of ay - bx is