The quantum numbers of four electrons are given below.
n m s
(1) Electron 1 3 0 0 -1/2
(2) Electron 2 4 0 0 1/2
(3) Electron 3 3 2 0 1/2
(4) Electron 4 3 1 0 -1/2
The correct order of decreasing energy of these electrons is -
1. Electron 3 > Electron 1 > Electron 4> Electron 2
2. Electron 4> Electron 2 > Electron 3 > Electron 1
3. Electron 3 > Electron 2 > Electron 4 > Electron 1
4. Electron 2 > Electron 4 > Electron 3 > Electron 1
Prefer Books for Question Practice? Get NEETprep's Unique MCQ Books with Online Audio/Video/Text Solutions via Telegram Bot
NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich type of radiation is not emitted by the electronic structure of atoms:
1. Ultraviolet light
2. X-rays
3. Visible light
4. y-rays
Prefer Books for Question Practice? Get NEETprep's Unique MCQ Books with Online Audio/Video/Text Solutions via Telegram Bot
NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAn absorption line of the lowest frequency in the transition of hydrogen spectra is
1. n=1 to n=2
2. n=3 to n=8
3. n=2 to n=1
4. n=8 to n=3
Prefer Books for Question Practice? Get NEETprep's Unique MCQ Books with Online Audio/Video/Text Solutions via Telegram Bot
NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIf uncertainty in the position of an electron is zero the uncertainty in its momentum will be
(1) < h/4
(2) > h/4
(3) zero
(4) infinite
Prefer Books for Question Practice? Get NEETprep's Unique MCQ Books with Online Audio/Video/Text Solutions via Telegram Bot
NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe maximum number of atomic orbitals associated with a principal quantum number 5 is-
1. 9
2. 12
3. 16
4. 25
Prefer Books for Question Practice? Get NEETprep's Unique MCQ Books with Online Audio/Video/Text Solutions via Telegram Bot
NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe de Broglie wavelength of electron of He+ ion is 3.329Å. If the photon emitted upon de-excitation of this He+ ion is made to hit H atom in its ground state so as to liberate electron from it, what will be the de Broglie's wavelength of photoelectron ?
1. 0.1518 Å
2. 6.1518 Å
3. 2.3518 Å
4. 4.1218 Å
Prefer Books for Question Practice? Get NEETprep's Unique MCQ Books with Online Audio/Video/Text Solutions via Telegram Bot
NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyVelocity of helium atom at 300 K is 2.40 x 102 meter per sec. What is its wavelength? (mass number of helium is 4) -
1. 0.416 nm
2. 0.83 nm
3. 803 Å
4. 8000 Å
Prefer Books for Question Practice? Get NEETprep's Unique MCQ Books with Online Audio/Video/Text Solutions via Telegram Bot
NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIf the Planck’s constant h=6.6 x 10-34 Js, the de-Broglie wavelength of a particle having the momentum of 3.3 x 10-24 kg m s-1 will be
1. 0.002 Å
2. 0.02 Å
3. 0.2 Å
4. 2Å
Prefer Books for Question Practice? Get NEETprep's Unique MCQ Books with Online Audio/Video/Text Solutions via Telegram Bot
NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich of the following statements is not true with respect to photoelectric effect -
1. The plot of kinetic energy of the photoelectrons against frequency of absorbed radiation gives a straight line parallel to x-axis
2. The plot of K.E. of the photoelectrons against frequency of absorbed radiation gives a straight line with slope equal to h and intercept to work function of metal
3. The plot of kinetic energy of the photoelectrons versus the intensity of incident radiation with constant frequency gives a straight line parallel to x-axis
4. When intensity of light is increased the number of photons ejected increases but the energies of these electrons are the same.
Prefer Books for Question Practice? Get NEETprep's Unique MCQ Books with Online Audio/Video/Text Solutions via Telegram Bot
NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe first line in the Lyman series in the spectrum of hydrogen atom occurs at a wavelength of 1215 Å and the limit for Balmer series is 3645 Å. Calculate the wavelength corresponding to series limit of Lyman series.
1. 911.2 Å
2. 812.2 Å
3. 712.2 Å
4. 678.4 Å
Prefer Books for Question Practice? Get NEETprep's Unique MCQ Books with Online Audio/Video/Text Solutions via Telegram Bot
NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology