KVPY Government Jobs Exams

The set of principal (n), azimuthal (l) and magnetic (m1) quantum numbers that is not allowed for the electron in H-atom is
option
(A) n = 3, l = 1, m1 = -1
(B) n = 3, l = 0, m1 = 0
(C) n = 2, l = 1, m1 = 0
(D) n = 2, l = 2, m1 = -1

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KVPY Other Question

Two balloons A and B containing 0.2 mole and 0.1 mole of helium at room temperature and 2.0 atm, respectively, are connected. When equilibrium is established, the final pressure of He in the system is
option
(A) 1.0 atm
(B) 1.5 atm
(C) 0.5 atm
(D) 2.0 atm At 298 K, assuming ideal behaviour, the average kinetic energy of a deuterium molecule is
option
(A) two times that of a hydrogen molecule
(B) four times that of a hydrogen molecule
(C) half of that of a hydrogen molecule
(D) same as that of a hydrogen molecule