Verified Solution • 2025–26 Session moderate

QJEEM22Chb190: JEE Main 2022 Chemistry - Class 11 JEEM22Chb190 Solution: If the radius of the 3 rd Bohr's orbit of hydrogen atom is r 3…

If the radius of the 3rd Bohr's orbit of hydrogen atom is r3 and the radius of 4th Bohr's orbit is r4. Then :

Multiple Choice Options

  • A r4=916r3{r_4} = {9 \over {16}}{r_3}
  • B r4=169r3{r_4} = {16 \over {9}}{r_3}
  • C r4=34r3{r_4} = {3 \over {4}}{r_3}
  • D r4=43r3{r_4} = {4 \over {3}}{r_3}

Step-by-Step Verified Solution

We know,

r=r0×n2zr = {r_0} \times {{{n^2}} \over z}

For hydrogen atom,

∴\therefore r3=r0×321{r_3} = {r_0} \times {{{3^2}} \over 1}

⇒r0×r39\Rightarrow {r_0} \times {{{r_3}} \over 9}

and r4=r0×421{r_4} = {r_0} \times {{{4^2}} \over 1}

=r39×16= {{{r_3}} \over 9} \times 16

=169r3= {{16} \over 9}{r_3}

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