For principal quantum number n=3, the possible values of orbital quantum number l are
Options
(a) 1,2,3 (b) 0,1,2,3 (c) 0,1,2 (d) (-1,0,+1)
Correct Answer:
0,1,2
Explanation:
No explanation available. Be the first […]
The ionisation energy of hydrogen is 13.6 eV. The energy of the photon released when an electron jumps from the first excited state (n=2) to the ground state of hydrogen atom is
Options
The first line in Lyman series has wavelength λ. The wavelength of the first line in Balmer series is
Options
(a) 2/9 λ (b) 9/2 λ (c) 5/27 λ (d) 27/5 λ
Correct […]
The excitation potential of hydrogen atom in the first excited state is
Options
(a) 13.6 V (b) (-13.6 V) (c) 10.2 V (d) (-10 V)
Correct Answer:
10.2 V
Explanation:
Energy of […]
Number of spectral lines in hydrogen atom is
Options
(a) 8 (b) 6 (c) 15 (d) ∞
Correct Answer:
∞
Explanation:
No explanation available. Be the first to write the explanation for this […]
If an electron in a hydrogen atom jumps from the 3rd orbit to the 2nd orbit, it emits a photon of wavelength λ. When it jumps from the 4th orbit to the 3rd orbit, the […]
Electrons of mass m with de-Broglie wavelength λ fall on the target in an X-ray tube. The cut-off wavelength (λ₀) of the emitted X-ray is
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(a) λ₀= 2mcλ²/h (b) λ₀= 2h/mc (c) λ₀= […]
When an α-particle of mass m moving with velocity ν bombards on a heavy nucleus of charge Ze, its distance of closest approach from the nucleus depends on m as
Options
(a) 1/√m […]
Given the value of Rydberg constant is 10⁷ m⁻¹, the wave number of the last line of the Balmer series in hydrogen spectrum will be
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(a) 0.5×10⁷ m⁻¹ (b) 0.25×10⁷ m⁻¹ (c) […]
What is the wavelength of light for the least energetic photon emitted in the Lyman series of the hydrogen spectrum. (take, hc=1240 eV-nm)
Options
(a) 122 nm (b) 82 nm (c) 150 nm […]
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