A) 0.5
B) 1.5
C) 0.75
D) 2.25
Correct Answer: D
Solution :
For hydrogen atom, \[{{r}_{n}}=\frac{0.53\times {{n}^{2}}}{Z}\] Third Bohr orbit radius, \[{{r}_{3}}=\frac{0.53\times {{(3)}^{2}}}{1}\] Second Bohr orbit radius, \[{{r}_{2}}=\frac{0.53\times {{(2)}^{2}}}{1}\] \[\frac{{{r}_{3}}}{{{r}_{2}}}=\frac{{{(3)}^{2}}}{{{(2)}^{2}}}\] \[=2.25\]
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