1
MHT CET 2021 24th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

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?

A
Kinetic energy, potential energy and total energy decreases
B
Kinetic energy and total energy decreased but potential energy increases
C
Kinetic energy increases but potential energy and total energy decreases
D
Kinetic energy decreases, potential energy increases but total energy remains the same.
2
MHT CET 2021 24th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

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

A
36 : 5
B
3 : 4
C
9 : 5
D
5 : 9
3
MHT CET 2021 23rd September Evening Shift
MCQ (Single Correct Answer)
+1
-0

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

A
$$\mathrm{E}_3=\frac{4 \mathrm{E}}{9}$$
B
$$\mathrm{E}_3=\frac{16 \mathrm{E}}{3}$$
C
$$\mathrm{E}_3=\frac{16 \mathrm{E}}{9}$$
D
$$\mathrm{E}_3=\frac{4 \mathrm{E}}{3}$$
4
MHT CET 2021 23th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

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

A
1216 $$\mathop A\limits^o $$
B
3646 $$\mathop A\limits^o $$
C
18760 $$\mathop A\limits^o $$
D
8208 $$\mathop A\limits^o $$
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