Atomic Structure · JEE Main previous year questions

2005 2 questions

1. Q1532005 · 28 Apr 2005 · Shift 1

   In a multi-electron atom, which of the following orbitals described by the three quantum numbers 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

   1. A.(D) and (E)
   2. B.(C) and (D)
   3. C.(B) and (C)
   4. D.(A) and (B)
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   Answer: A

2. Q1832005 · 28 Apr 2005 · Shift 1

   The photon of hard gamma radiation knocks a proton out of ${}_{12}^{24}\mathrm{Mg}$ nucleus to form

   1. A.the isotope of parent nucleus
   2. B.the isobar of parent nucleus
   3. C.the nuclide ${}_{11}^{23}\mathrm{Na}$
   4. D.the isobar of ${}_{11}^{23}\mathrm{Na}$
   Show answer

   Answer: C