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JEE Advanced levelSingle correct optionDifficulty 3 of 3as158

Assertion (A): A 3p orbital has one radial node, whereas a 2p orbital has none. Reason (R): the number of radial nodes equals . Choose the correct option.

  1. ABoth A and R are true and R explains A
  2. BBoth A and R are true but R does not explain A
  3. CA is true but R is false
  4. DA is false but R is true

Answer: A

3p: ; 2p: . Both statements are true, and the formula directly yields the numbers in A.
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