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JEE Main 2022 (Online) 29th June Morning Shift
MCQ (Single Correct Answer)
+4
-1
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Which of the following statements are correct?

(A) The electronic configuration of Cr is [Ar] 3d5 4s1.

(B) The magnetic quantum number may have a negative value.

(C) In the ground state of an atom, the orbitals are filled in order of their increasing energies.

(D) The total number of nodes are given by n $$-$$ 2.

Choose the most appropriate answer from the options given below :

A
(A), (C) and (D) only
B
(A) and (B) only
C
(A) and (C) only
D
(A), (B) and (C) only
2
JEE Main 2022 (Online) 28th June Evening Shift
MCQ (Single Correct Answer)
+4
-1
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Hindi

Consider the following statements :

(A) The principal quantum number 'n' is a positive integer with values of 'n' = 1, 2, 3, ...

(B) The azimuthal quantum number 'l' for a given 'n' (principal quantum number) can have values as 'l' = 0, 1, 2, ...... n

(C) Magnetic orbital quantum number 'ml' for a particular 'l' (azimuthal quantum number) has (2l + 1) values.

(D) $$\pm$$ 1/2 are the two possible orientations of electron spin.

(E) For l = 5, there will be a total of 9 orbital

Which of the above statements are correct?

A
(A), (B) and (C)
B
(A), (C), (D) and (E)
C
(A), (C) and (D)
D
(A), (B), (C) and (D)
3
JEE Main 2022 (Online) 26th June Evening Shift
MCQ (Single Correct Answer)
+4
-1
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The number of radial and angular nodes in 4d orbital are, respectively

A
1 and 2
B
3 and 2
C
1 and 0
D
2 and 1
4
JEE Main 2022 (Online) 26th June Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
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Bengali

If the radius of the 3rd Bohr's orbit of hydrogen atom is r3 and the radius of 4th Bohr's orbit is r4. Then :

A
$${r_4} = {9 \over {16}}{r_3}$$
B
$${r_4} = {16 \over {9}}{r_3}$$
C
$${r_4} = {3 \over {4}}{r_3}$$
D
$${r_4} = {4 \over {3}}{r_3}$$
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