KVPY Government Jobs Exams

2.52 g of oxalic acid dehydrate was dissolved in 100 ml of water, 10 mL of this solution was diluted to 500
mL. The normality of the final solution and the amount of oxalic acid (mg/mL) in the solution are
respectively-
(A) 0.16 N, 5.04 (B) 0.08 N, 3.60 (C) 0.04 N, 3.60 (D) 0.02 N, 10.08

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KVPY Other Question

At time t = 0, a container has N0 radioactive atoms with a decay constant λ. In addition, c numbers of atoms
of the same type are being added to the container per unit time. How many atoms of this type are there at
t = T For the reaction A → B, ΔHº = 7.5 mol–1 and ΔSº = 2.5 J mol–1. The value of ΔGº and the temperature at
which the reaction reaches equilibrium are, respectively,
(A) 0 kJ mol–1 and 400 K (B) –2.5 kJ mol–1 and 400 K
(C) 2.5 kJ mol–1 and 200 K (D) 0 kJ mol–1 and 300 K