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QJEE MAIN_2021
If the Thompson model of the atom was correct, then the result of Rutherford's gold foil experiment would have been
JEE MainChemistryEasy
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QJEE-MAIN 2021
A 50 watt bulb emits monochromatic red light of wavelength of 795 nm. The number of photons emitted per second by the bulb is$...
JEE MainChemistryEasy
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QJEE MAIN 2021
$\mathrm{Ge}(\mathrm{Z}=32)$ in its ground state electronic configuration has x completely filled orbitals with $\mathrm{m}_{\mathrm{I}}=0$. The value of $x$ is $\_\_\_\_$ .
JEE MainChemistryEasy
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QJEE MAIN 2019
The size of the iso-electronic species $\mathrm{Cl}^{-}, \mathrm{Ar}$ and $\mathrm{Ca}^{2+}$ is affected by
JEE MainChemistryEasy
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QJEE MAIN 2021
An accelerated electron has a speed of $5 \times 10^6 \mathrm{~ms}^{-1}$ with an uncertainty of $0.02 \%$. The uncertainty in finding its location while in...
JEE MainChemistryEasy
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QJEE MAIN 2021
The Azimuthal quantum number for the valence electrons of Ga+ ion is _______.
(Atomic number of Ga = 31)
JEE MainChemistryMedium
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QJEE MAIN 2019
JEE MainChemistryEasy
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QJEE MAIN 2021
The wavelength of electrons accelerated from rest through a potential difference of 40 kV is $x \times 10^{-12} \mathrm{~m}$. The value of $x$ is $\_\_\_\_$...
JEE MainChemistryMedium
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QJEE MAIN 2021
Given below are two statements : Statement I : Rutherford's gold foil experiment cannot explain the line spectrum of hydrogen atom. Statement II...
JEE MainChemistryEasy
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QJEE MAIN 2019
If $p$ is the momentum of the fastest electron ejected from a metal surface after the irradiation of light having wavelength $\lambda$, then for 1.5...
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