AIEEE 2005 | Structure of Atom Question 210 | Chemistry

In a multi-electron atom, which of the following orbitals described by the three quantum members will have the same energy in the absence of magnetic and electric fields?
(A) n = 1, l = 0, m = 0
(B) n = 2, l = 0, m = 0
(C) n = 2, l = 1, m = 1
(D) n = 3, l = 2, m = 1
(E) n = 3, l = 2, m = 0

(D) and (E)

(B) and (C)

(A) and (B)

AIEEE 2004

MCQ (Single Correct Answer)

-1

Which of the following sets of quantum numbers is correct for an electron in 4f orbital?

n = 4, l = 3, m = +1, s = + 1/2

n = 4, l = 4, m = -4, s = - 1/2

n = 4, l = 3, m = +4, s = + 1/2

n = 3, l = 2, m = -2, s = + 1/2

AIEEE 2004

MCQ (Single Correct Answer)

-1

Which one of the following sets of ions represents the collection of isoelectronic species? (Atomic nos. : F = 9, Cl = 17, Na = 11, Mg = 12, Al = 13, K = 19, Ca = 20, Sc = 21)

K⁺, Cl^-, Mg²⁺, Sc³⁺

Na⁺, Ca²⁺, Sc³⁺, F^-

K⁺, Ca²⁺, Sc³⁺, Cl^-

Na⁺, Mg²⁺, Al³⁺, Cl^-

AIEEE 2004

MCQ (Single Correct Answer)

-1

The wavelength of the radiation emitted when in a hydrogen atom electron falls from infinity to stationary state 1, would be (Rydberg constant = 1.097 $$\times$$ 10⁷ m^-1)

406 nm

192 nm

91 nm

9.1 $$\times$$ 10^-8 nm

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