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AP-EAPCET SERIES
Chemistry

Bohr S Model For Hydrogen Atom

13 previous year questions.

Volume: 13 Ques
Yield: Medium

High-Yield Trend

8
2025
1
2024
2
2023
2
2018

Chapter Questions
13 MCQs

01
PYQ 2018
easy
chemistry ID: ap-eapce
The ratio of lowest energy in terms of wave numbers of Balmer and Lyman series of lines of atomic spectrum of hydrogen is
1
5 : 27
2
27 : 5
3
20 : 27
4
27 : 2
02
PYQ 2018
easy
chemistry ID: ap-eapce
A light of frequency when falls on a metal plate emits electrons that have double the kinetic energy compared to the kinetic energy of emitted electrons when frequency of falls on the same plate. The threshold frequency of the metal in is
1
2
3
4
03
PYQ 2023
medium
chemistry ID: ap-eapce
The angular momentum of electron in H atom in a particular n state is . What is the energy in J required to excite the electron from this particular n state to (n+1) state?
1
2
3
4
04
PYQ 2023
medium
chemistry ID: ap-eapce
Which of the following electronic transitions in hydrogen atom will require the highest energy?
1
to
2
to
3
to
4
to
05
PYQ 2024
hard
chemistry ID: ap-eapce

The angular momentum of an electron in a stationary state of ( ) is . The radius and energy of that stationary state are respectively.

1

2

3

4

06
PYQ 2025
medium
chemistry ID: ap-eapce
The de Broglie wavelength of an electron in the third Bohr orbit of H-atom is
1
2
3
4
07
PYQ 2025
medium
chemistry ID: ap-eapce
Identify the correct statements from the following:
I) Isotopes of an element show different chemical behaviour
II) Lyman series of lines of hydrogen spectrum appear in UV region
III) The oscillating electric and magnetic field components of electromagnetic radiation are perpendicular to each other and both are perpendicular to the direction of propagation of radiation
1
II & III only
2
I & II only
3
I & III only
4
I, II, III
08
PYQ 2025
medium
chemistry ID: ap-eapce
The number of electrons with magnetic quantum number in the elements with atomic numbers and are respectively
1
12, 13
2
12, 12
3
13, 12
4
14, 15
09
PYQ 2025
medium
chemistry ID: ap-eapce
The de Broglie wavelengths of two fast-moving particles , are nm, nm respectively. Mass of is nine times the mass of . The ratio of kinetic energies of , is:
1
2
3
4
10
PYQ 2025
medium
chemistry ID: ap-eapce
Observe the following data.
IonQ4+Xb+Yc+Zd+
Radius (pm)536640100

Q4+, Xb+, Yc+, Zd+ are respectively

1
Mg\textsuperscript{2+}, Al\textsuperscript{3+}, Na\textsuperscript{+}, Si\textsuperscript{4+}
2
Al\textsuperscript{3+}, Si\textsuperscript{4+}, Mg\textsuperscript{2+}, Na\textsuperscript{+}
3
Mg\textsuperscript{2+}, Si\textsuperscript{4+}, Al\textsuperscript{3+}, Na\textsuperscript{+}
4
Al\textsuperscript{3+}, Mg\textsuperscript{2+}, Si\textsuperscript{4+}, Na\textsuperscript{+}
11
PYQ 2025
medium
chemistry ID: ap-eapce
The de Broglie wavelengths of two fast-moving particles , are nm, nm respectively. Mass of is nine times the mass of . The ratio of kinetic energies of , is:
1
2
3
4
12
PYQ 2025
medium
chemistry ID: ap-eapce
The de Broglie wavelength of an electron in the third Bohr orbit of H-atom is
1
2
3
4
13
PYQ 2025
medium
chemistry ID: ap-eapce
Which of the following statements are correct? (only correct)
I) The energy of hydrogen atom in its ground state is -13.6 eV.
II) On the basis of Bohr's model, the radius of the 3 orbit of hydrogen atom is 158.7 pm.
III) The order of radius of the first orbit of H, He , Li and Be is H > He > Li > Be
1
II & III only
2
I & III only
3
I & II only
4
I, II, III

About Bohr S Model For Hydrogen Atom - AP-EAPCET

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