KVPY Government Jobs Exams

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

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KVPY Other Question

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 The solubility product of Mg(OH)2 is 1.0 × 10–12. Concentrated aqueous NaOH solution is added to a 0.01 M
aqueous solution of MgCl2. The pH at which precipitation occur is-
(A) 7.2 (B) 7.8 (C) 8.0 (D) 9.0