Practice free Chemistry NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
Splitting of spectral lines under the influence of magnetic field is called
The splitting of spectral lines due to the influence of a magnetic field is known as the Zeeman effect. It is caused by the interaction between the magnetic dipole moment of the electron and the applied magnetic field.
The total number of orbitals in a shell with principal quantum number ‘n’ is
Which of the following expressions gives the de-Brogiie relationship ?
The de-Broglie relationship relates the wavelength (λ) of a particle with its momentum (p) as λ = h/p, where h is the Planck's constant. By substituting p = mv, we get λ = h/mv, which is the correct expression relating wavelength, mass, and velocity of a particle.
The uncertainty in the momentum of an electron is $ 1·0 \times 10^{–5} kg ms^{–1}. The uncertainty in its position will be (h = 6·62 \times 10^{–34} kg m^2s^{–1} )$
If the radius of first Bohr orbit be $a_0$ , then the radius of third Bohr orbit would be
Radius of Bohr orbit $ = { n ^ 2 \over Z } \times a_0 $
The first emission line in the atomic spectrum of hydrogen in the Balmer series appears at
$ for Balmer series n_1 = 2 and n_2 = 3 for first line $
The de-Broglie wavelength of a particle with mass 1g and velocity 100 m/s is
Which of the following sets of quantum numbers belongs to highest energy ?
The principal quantum number (n) determines the energy level, and higher values of n correspond to higher energy levels. The orbital angular momentum quantum number (l) can have values from 0 to n-1. The magnetic quantum number (m) can have values from -l to +l. The spin quantum number (s) can have values of +1/2 or -1/2.
If wavelength of photon is $ 2·2 \time 10^{–11} m, h = 6·6 \times10 ^{–34} Js$ , then momentum of photon is
According to Bohr’s theory, the energy required for the transition of H atom from n = 6 to n = 8 state is
According to Bohr's theory, the energy of an electron in a hydrogen atom is given by E = -13.6 eV/n^2, where n is the principal quantum number. The energy difference between n=6 and n=8 is less than the energy difference between n=5 and n=7, as the energy levels get closer together for higher values of n.
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The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.