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

Minimum number of nodes are present in

A
2s
B
3s
C
4s
D
5s
2
COMEDK 2022
MCQ (Single Correct Answer)
+1
-0

$$\mathrm{O^{2-},F^-,Mg^{2+},Al^{3+},O_2,F_2}$$. How many of the species given above isoelectronic?

A
4
B
2
C
3
D
5
3
COMEDK 2022
MCQ (Single Correct Answer)
+1
-0

The spectrum of He$$^+$$ is similar to

A
H
B
Li$$^+$$
C
Na
D
He$$^+$$
4
COMEDK 2022
MCQ (Single Correct Answer)
+1
-0

The Paschen series of hydrogen spectrum lies in which region?

A
UV region
B
IR region
C
Visible region
D
Microwave region
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