KVPY Government Jobs Exams

At 300 K the vapour pressure of two pure liquids, A and B are 100 and 500 mm Hg, respectively. If in a
mixture of A and B, the vapour pressure is 300 mm Hg, the mole fractions of A in the liquid and in the
vapour phase, respectively, are-
(A) 1/2 and 1/10 (B) 1/4 and 1/6 (C) 1/4 and 1/10 (D) 1/2 and 1/6

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KVPY Other Question

The electron in hydrogen atom is in the first Bohr orbit (n = 1). The ratio of transition energies, E(n = 1 → n
= 3) to E(n = 1 → n = 2), is-
(A) 32/27 (B) 16/27 (C) 32/9 (D) 8/9 The crystal field stabilization energies (CFSE) of high spin and low spin d^6 metal complexes in terms of Δ0,
respectively, are-
(A) –0.4 and –2.4 (B) –2.4 and –0.4 (C) –0.4 and 0.0 (D) –2.4 and 0.0