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======= ####28. The total energy of electron in the ground state of hydrogen atom is $- 13.6 e V$ . The kinetic energy of an electron in the first excited state is [2007]

c3eec34ec6b1fad69db54a20ad4b2dca40c2aa54 (a) $6.8 e V$

(b) $13.6 e V$

(d) $3.4 e V$ .

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Answer:

Correct Answer: 28. (d)

Solution:

(d) Energy in the first excited state

$= \frac{- 13.6}{n^{2}} = \frac{- 13.6}{2^{2}} = - 3.4 e V$

But K.E. $= - ($ Total energy $) = + 3.4 e V$ .

Atoms - Result Question 27

28. The total energy of electron in the ground state of hydrogen atom is $- 13.6 e V$ . The kinetic energy of an electron in the first excited state is [2007]

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Answer:

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Atoms - Result Question 27

28. The total energy of electron in the ground state of hydrogen atom is −13.6eV. The kinetic energy of an electron in the first excited state is [2007]

«««< HEAD

Answer:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

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28. The total energy of electron in the ground state of hydrogen atom is $- 13.6 e V$ . The kinetic energy of an electron in the first excited state is [2007]