JEE Main 2021 · ChemistryMultiple choiceDiagram basedMediumData or graph

JEE Main 25 February 2021, Shift 1, Chemistry Q31

Question 31 of 90 in this shift, Chemistry question 1 of 30, Section A.

The plots of radial distribution functions for various orbitals of hydrogen atom against 'r' are given below : (A), (B), (C), (D) [plots shown in figure] The correct plot for

3s

orbital is :

The figure, in words

Four plots, each with y-axis

4\pi r^2 R_{n,l}^2(r)

and x-axis r(Å) with ticks 5 and 10. (A): y ticks 0, 4, 8; a single sharp peak (height a little under 8) near r about 1 with a dotted vertical line, falling to zero by about r = 2.5. (B): y ticks 0 to 3; a small peak near r about 0.5, a zero near r about 1, then a larger peak (height 2.5) near r about 2.7 marked by a dotted line, falling to zero by about r = 6.5. (C): y ticks 0 to 3; a single peak (height 2.5) near r about 2.2 marked by a dotted line, falling to zero by about r = 6. (D): y ticks 0, 0.5, 1.0, 1.5, 2.0; a small peak near r about 0.7, a zero near r about 1.5, a second peak (about 0.55) near r about 2.7, a zero near r about 4, then a large peak (about 1.15) near r about 7 marked by a dotted line, falling to zero by about r = 13. The options (A)-(D) are printed only as the letters of these plots.

(1)(A)
(2)(B)
(3)(C)
(4)(D)Official answer

Official answer

Option 4

NTA final key.

Chapter: Structure of Atom
Topic: Quantum Numbers
Idea tested: Interpreting Radial Probability Distribution Graphs

JEE Main 25 February 2021, Shift 1, Chemistry Q31

Same topic in other shifts