1
VITEEE 2022
MCQ (Single Correct Answer)
+1
-0

An electron in H-atom in its ground state absorbs 1.50 times as much as energy as the minimum required for its escape $$(13.6 \mathrm{~eV})$$ from the atom. Thus, KE given to emitted electron is

A
13.6 eV
B
20.4 eV
C
34.0 eV
D
6.8 eV
2
VITEEE 2021
MCQ (Single Correct Answer)
+1
-0

What is the total number of electrons that can have the values $$n=2, l=1, s=1 / 2$$ in the electronic configuration $$1 s^2 2 s^2 2 p^3$$ ?

A
1
B
3
C
5
D
7
3
VITEEE 2021
MCQ (Single Correct Answer)
+1
-0

Calculate the wavelength associated with an electron moving with a velocity of $$10^6 \mathrm{~m} / \mathrm{s}$$ (mass of electron $$=9.1 \times 10^{-31} \mathrm{~kg}, h=6.6 \times 10^{-34} \mathrm{~kg} \mathrm{~m}^2 \mathrm{~s}^{-1}$$ )

A
$$6.2 \times 10^{-8} \mathrm{~m}$$
B
$$7.25 \times 10^{-8} \mathrm{~m}$$
C
$$6.25 \mathop A\limits^o$$
D
None of these
4
VITEEE 2021
MCQ (Single Correct Answer)
+1
-0

Which of the following pairs is not correctly matched?

A
Hund's rule In orbitals of equivalent energy electron spins remain unpaired if possible
B
Pauli's exclusion principle No two electrons can have all the four quantum numbers identical
C
Zeeman effect The effect of magnetic field on the automatic spectra
D
Uncertainty principle It is impossible to determine the position of an electron
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