MHT CET 2021 24th September Morning Shift | Atoms and Nuclei Question 63 | Physics

An electron makes a transition from an excited state to the ground state of a hydrogen like atom. Out of the following statements which one is correct?

Kinetic energy, potential energy and total energy decreases

Kinetic energy and total energy decreased but potential energy increases

Kinetic energy increases but potential energy and total energy decreases

Kinetic energy decreases, potential energy increases but total energy remains the same.

MHT CET 2021 24th September Morning Shift

MCQ (Single Correct Answer)

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The ratio of maximum to minimum wavelength in Balmer series of hydrogen atom is

36 : 5

3 : 4

9 : 5

5 : 9

MHT CET 2021 23rd September Evening Shift

MCQ (Single Correct Answer)

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Energy of electron in the second orbit of hydrogen atom is $$\mathrm{E}$$. The energy of electron '$$\mathrm{E}_3$$' in the third orbit of helium $$(\mathrm{He})$$ atom will be

$$\mathrm{E}_3=\frac{4 \mathrm{E}}{9}$$

$$\mathrm{E}_3=\frac{16 \mathrm{E}}{3}$$

$$\mathrm{E}_3=\frac{16 \mathrm{E}}{9}$$

$$\mathrm{E}_3=\frac{4 \mathrm{E}}{3}$$

MHT CET 2021 23th September Morning Shift

MCQ (Single Correct Answer)

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The shortest wavelength for Lyman series is 912 $$\mathop A\limits^o $$. The longest wavelength in Paschen series is

1216 $$\mathop A\limits^o $$

3646 $$\mathop A\limits^o $$

18760 $$\mathop A\limits^o $$

8208 $$\mathop A\limits^o $$

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