In a H atom, let K, n be the kinetic energy of the electron and principal quantum number, respectively. Now, relate K, n according to Bohr's model of H atom:

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$K \propto \frac{1}{n^{2}}$

$K \propto n^{2}$

$K \propto \frac{1}{n^{4}}$

K does not depend on n

answer is A.

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Detailed Solution

According to the Bohr's atomic theory, the kinetic energy of an electron is directly proportional to the square of the atomic number and inversely proportional to the square of the principal quantum number.

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