28 JEE Main 2021 Structure of Atom previous-year questions with verified answers and step-by-step solutions.
These are the JEE Main 2021 previous-year questions from the Structure of Atom chapter of Chemistry. Each links to a full solution with a verified answer key. To see the whole chapter across all years, visit the Structure of Atom chapter hub.
A ball weighing 10   g is moving with a velocity of 90   m   s - 1 . If the uncertainty in its velocity…
The value of magnetic quantum number of the outermost electron of Zn + ion is _________ . (Integer answer)
Given below are two statements : Statement I : According to Bohr's model of an atom, qualitatively the magnitude of vel…
A certain orbital has no angular nodes and two radial nodes. The orbital is:
The spin only magnetic moments (in BM) for free Ti 3 + , V 2 + and Sc 3 + ions respectively are (At.No. Sc : 21 , Ti :…
An accelerated electron has a speed of 5 × 10 6   ms - 1 with an uncertainty of 0 . 02 % . The uncertainty in…
The number of photons emitted by a monochromatic (single frequency) infrared range finder of power 1   mW and wave…
Electromagnetic radiation of wavelength 663   nm is just sufficient to ionise the atom of metal A . The ionization…
Given below are two statements : Statement I : Rutherford's gold foil experiment cannot explain the line spectrum of hy…
If the Thomson model of the atom was correct, then the result of Rutherford's gold foil experiment would have been:
Log in to unlock the full list, track what you've solved, and practice on the TCS iON-style CBT player. It's free.