Structure of Atom | Atomic Structure: MCQs | Question – Paper 4

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Topic: Structure of Atom, Test No.: 04, Total MCQs: 10

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Question 1

What is the maximum numbers of electrons that can be associated with the following set of quantum numbers? [NEET 2013]

n = 3, l = 1 and m = –1

A
6
B
4
C
2
D
10
Question 2
With increase in principal quantum number n, the energy difference between adjacent energy levels in hydrogen atom
A
increases
B
decreases
C
remain constant
D
decreases for lower values of n and increases for higher values of n
Question 3
What is the wave number of 4th line in Balmer series of Hydrogen spectrum?
(R = 1,09,677 cm–1)
A
24,630 cm–1
B
24,360 cm–1
C
24,730 cm–1
D
24,372 cm–1
Question 4
What is the wavelength (in m) of a particle of mass 6.62 × 10–29g moving with a velocity of 103ms–1? (h = 6.62 × 10–34 j.s.)
A
6.62 × 10–4
B
6.62 × 10–3
C
10–5
D
105
Question 5
Which hydrogen-like species will have same radius as that of Bohr orbit of hydrogen atom?
A
n = 2, Li2+
B
n = 2, Be3+
C
n = 2, He+
D
n = 3, Li2+
Question 6
Which of the following element has least number of electrons in its M-shell?
A
K
B
Mn
C
Ni
D
Sc
Question 7
Which of the following has the maximum number of unpaired ‘d’ electrons?
A
Zn2+
B
Fe2+
C
Ni3+
D
Cu+
Question 8
Time period of a wave is 5 × 10–3 s, what is the frequency?
A
5 × 10–3 s–1
B
2 × 102 s–1
C
23 × 103 s–1
D
5 × 102 s–1
Question 9

Uncertainty in position of a particle of 25 g in space is 10–5m. Hence, uncertainty in velocity (ms–1) is

(Planck's constant h = 6.6 ´ 10–34 Js)

A
2.1 × 10–28
B
2.1 × 10–34
C
0.5 × 10–34
D
5.0 × 10–24
Question 10
The wavelength of the radiation emitted, when in a hydrogen atom electron falls from infinity to stationary state 1, would be (Rydberg constant = 1.097 × 107 m–1)
A
91 nm
B
192 nm
C
406 nm
D
9.1 × 10–8 nm
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