List of top Chemistry Questions on Structure of atom asked in NEET (UG)

Select the correct statements from the following : 

A. Atoms of all elements are composed of two fundamental particles.
B. The mass of the electron is 9.10939 x 10-31 kg. 
C. All the isotopes of a given element same chemical properties. 
D. Protons and electrons are collected known as nucleons. 
E. Dalton’s atomic theory, regarded atom as an ultimate particle of matter.
Choose the correct answer from the options given below :

Which of the following statement is not correct about diborane?
4d, 5p, 5f and 6p orbitals are arranged in the order of decreasing energy. The correct option is :
In hydrogen atom, the de Broglie wavelength of an electron in the second Bohr orbit is : [Given that Bohr radius, $a_0$ = $52.9\, pm$ ]
Which one is a wrong statement ?
Which one is the wrong statement ?
How many electrons can fit in the orbital for which $n = 3$ and $l = 1$ ?
Which of the following pairs of d-orbitals will have electron density along the axes?
Calculate the energy in joule corresponding to light of wavelength 45 nm (Planck's constant, $h=6.63\times10^{-34}$ Js; speed of light, $c=3\times 10^{8}$.
What is the maximum numbers of electrons that can be associated with the following set of quantum numbers? n = 3, l = 1 and m = -1
Based on equation E = -2.178 x 10-18 J\((\frac{Z^2}{n^2})\) certain conclusions are written. Which of them is not correct ?
According to the Bohr Theory, which of the following transitions in the hydrogen atom will give rise to the least energetic photon?
A $0.66\, kg$ ball is moving with a speed of $100 \,m/s$. The associated wavelength will be $(h = 6.6 \times 10^{-34} \, Js)$
If uncertainty in position and momentum are equal, then uncertainty in velocity is
The orientation of an atomic orbital is governed by
Given, the mass of electron is $9.11 \times 10^{-31}\, kg$, Planck's constant is $6.626 \times 10^{-34}\, Js$, the uncertainty involved in the measurement of velocity within a distance of $0.1 \mathring{A}$ is

The energy of the second Bohr orbit of the hydrogen atom is -328 kJ mol-1; hence the energy of the fourth Bohr orbit would be:

The frequency of radiation emitted when the electron falls from $n = 4$ to $n = 1$ in a hydrogen atom will be (Given ionisation energy of $H = 2.18\times 10^{18} $J $atom^{-1}$ and $h = 6.625 \times 10^{-34} Js)$

The radioactive isotope \(_{27}^{60}\textrm{Co}\) which is used in the treatment of cancer can be made by (n, p) reaction. For this reaction the target nucleus is

The value of Planck's constant is $ 6.63 \times 10^{-34} \,Js.$ The velocity of light is $3.0 \times 10^8\, ms^{-1}$. Which value is closest to the wavelength in nanometers of a quantum of light with frequency of $8 \times 10^{15}\, s^{-1}$?

The value of Planck's constant is 6.63×10–34Js. The velocity of light is 3.0×108 ms–1. Which value is closest to the wavelength in nanometers of a quantum of light with a frequency of 8×1015 s–1:

In hydrogen atom, energy of first excited state is -3.4 eV. Then, KE of same orbit of hydrogen atom :-
The following quantum numbers are possible for how many orbital(s) $n = 3$ ,$l = 2$ and $m = +2$ are possible ?
Mn and Mp represet the mass of neutron and proton respectively. An element having mass M has N neutron and Z-protons, then the correct relation will be 
The uncertainty in momentum of an electron is $1\times 10^{-5} kg m/s.$ The uncertainty in its position will be (Given, $h = 6.62 \times 10^{-34} kg m^2/s)$