1
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1

If radius of second Bohr orbit of the He+ ion is 105.8 pm, what is the radius of third Bohr orbit of Li2+ ion?

A
158.7 pm
B
15.87 pm
C
1.587 pm
D
158.7 $$\mathop A\limits^o $$
2
NEET 2021
MCQ (Single Correct Answer)
+4
-1
A particular station of All India Radio, New Delhi broadcasts on a frequency of 1,368 kHz (kilohertz). The wavelength of the electromagnetic radiation emitted by the transmitter is : [speed of light c = 3.0 $$\times$$ 108 ms$$-$$1]
A
21.92 cm
B
219.3 m
C
219.2 m
D
2192 m
3
NEET 2019
MCQ (Single Correct Answer)
+4
-1
4d, 5p, 5f and 6p orbitals are arranged in the order of decreasing energy. The correct option is :
A
6p > 5f > 4d > 5p
B
5f > 6p > 4d > 5p
C
5f > 6p > 5p > 4d
D
6p > 5f > 5p > 4d
4
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Which of the following series of transitions in the spectrum of hydrogen atom falls in visible region?
A
Paschen series
B
Brackett series
C
Lyman series
D
Balmer series
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