1
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

The total number of nodes are given by

A
$$(n + 1)$$
B
$$(n -l- 1)$$
C
$$(n - 1)$$
D
$$(n -l+ 1)$$
2
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

Which of the following series of transitions in the spectrum of hydrogen atom fall in visible region?

A
Balmer series
B
Paschen series
C
Brackett series
D
Lyman series
3
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

The Lyman series of hydrogen spectrum lies in which region

A
Infrared region
B
Visible region
C
Ultraviolet region
D
X-ray region
4
COMEDK 2020
MCQ (Single Correct Answer)
+1
-0

A body of mass 10 mg is moving with a velocity of 100 ms$$^{-1}$$. The wavelength of de-Broglie wave associated with it would be

($$h=6.63\times10^{-34}$$ Js)

A
$$6.63\times10^{-37}$$ m
B
$$6.63\times10^{-31}$$ m
C
$$6.63\times10^{-34}$$ m
D
$$6.63\times10^{-35}$$ m
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