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ChemistryJEE Main 5 Apr 2026, Shift 1·Q3·MCQ·Easy–moderate

Structure of Atom · Uncertainty principle and orbital energies

Identify the correct statements from the following :
  • (A)Heisenberg uncertainty principle is applicable to electron.
  • (B)The size of 2px_x orbital is less than the size of 3px_x orbital.
  • (C)The energy of 2s orbital of H atom is equal to the energy of 2s orbital of Li.
  • (D)The electronic configuration of Cr is [Ar] 3d5^54s1^1
Choose the correct answer from the options given below :
  1. (1)A, B and C only
  2. (2)A, B and D only
  3. (3)B, C, and D only
  4. (4)A, C and D only

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See the full 5 Apr 2026, Shift 1 paper