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Atomic Structure

Get chapter-wise JEE Main & Advanced questions with solutions

Q JEE MAIN 2025
Which of the following postulate of Bohr's model of hydrogen atom is not in agreement with quantum mechanical model of an atom?
JEE Main Chemistry Easy
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Q JEE MAIN 2025
For hydrogen atom, the orbital/s with lowest energy is/are :[0pt] (A) 4 s (B) $3 p_{x}$ (C) $3 d_{x^{2}-y^{2}}$ (D) $3 d_{z^{2}}$ (E) $4 p_{z}$...
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Q JEE MAIN 2025
According to Bohr's model of hydrogen atom, which of the following statement is incorrect?
JEE Main Chemistry Easy
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Q JEE MAIN 2025
Given below are two statements : Statement (I): For a given shell, the total number of allowed orbitals is given by $\mathrm{n}^{2}$. Statement (II): For...
JEE Main Chemistry Easy
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Q JEE MAIN 2025
If ${a_0}$ is denoted as the Bohr radius of hydrogen atom, then what is the de-Broglie wavelength $(\lambda )$ of the electron present in the...
JEE Main Chemistry Easy
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Q JEE MAIN 2025
Choose the correct statements.
(A) Weight of a substance is the amount of matter present in it.
(B) Mass is the force exerted by gravity...
JEE Main Chemistry Easy
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Q JEE MAIN 2025
In a multielectron atom, which of the following orbitals described by three quantum numbers will have same energy in absence of electric and magnetic fields?
...
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Q JEE MAIN 2025
Heat treatment of muscular pain involves radiation of wavelength of about 900 nm. Which spectral line of H atom is suitable for this?
Given :...
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Q JEE MAIN 2025
Given below are two statements : Statement (I): A spectral line will be observed for a $2 p_x \rightarrow 2 p_y$ transition. Statement (II): $...
JEE Main Chemistry Easy
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Q JEE MAIN 2025
Lanthanoid ions with $4{f^7}$ configuration are :
(A) $\mathrm{Eu}^{2+}$
(B) $\mathrm{Gd}^{3+}$
(C) $\mathrm{Eu}^{3+}$
(D) $\mathrm{Tb}^{3+}$
(E) $\mathrm{Sm}^{2+}$
Choose the correct answer from the options given...
JEE Main Chemistry Hard
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