A) \[8.46\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
B) \[0.705\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
C) \[1.59\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
D) \[4.79\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
Correct Answer: C
Solution :
According to Bohr model, radius of hydrogen atom \[({{r}_{n}})=\frac{0.529\times {{n}^{2}}}{Z}\overset{\text{o}}{\mathop{\text{A}}}\,\] (where,\[n=\]number of orbit, \[Z=\]atomic number) \[{{r}_{3}}=\frac{0.529\times {{(3)}^{2}}}{1}=4.761\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
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