1
JEE Main 2023 (Online) 24th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The number of s-electrons present in an ion with 55 protons in its unipositive state is

A
10
B
9
C
12
D
8
2
JEE Main 2023 (Online) 24th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The magnetic moment of a transition metal compound has been calculated to be 3.87 B.M. The metal ion is

A
Ti$$^{2+}$$
B
V$$^{2+}$$
C
Cr$$^{2+}$$
D
Mn$$^{2+}$$
3
JEE Main 2023 (Online) 24th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

It is observed that characteristic X-ray spectra of elements show regularity. When frequency to the power "n" i.e. $${v^n}$$ of X-rays emitted is plotted against atomic number "Z", following graph is obtained.

JEE Main 2023 (Online) 24th January Morning Shift Chemistry - Structure of Atom Question 41 English

The value of 'n' is :

A
1
B
$$\frac{1}{2}$$
C
2
D
3
4
JEE Main 2022 (Online) 29th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are the quantum numbers for 4 electrons.

A. $$\mathrm{n}=3,l=2, \mathrm{~m}_{1}=1, \mathrm{~m}_{\mathrm{s}}=+1 / 2$$

B. $$\mathrm{n}=4,l=1, \mathrm{~m}_{1}=0, \mathrm{~m}_{\mathrm{s}}=+1 / 2$$

C. $$\mathrm{n}=4,l=2, \mathrm{~m}_{1}=-2, \mathrm{~m}_{\mathrm{s}}=-1 / 2$$

D. $$\mathrm{n}=3,l=1, \mathrm{~m}_{1}=-1, \mathrm{~m}_{\mathrm{s}}=+1 / 2$$

The correct order of increasing energy is

A
D < B < A < C
B
D < A < B < C
C
B < D < A < C
D
B < D < C < A
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