Structure of Atom | Atomic Structure: MCQs | Question – Paper 2


Topic: Structure of Atom, Test No.: 02, Total MCQs: 15

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Question 1
The pair of species with the same bond order is [CBSE AIPMT 2012]
A
NO, CO
B
N2, O2
C
O22-, B2
D
O2+, NO+
Question 2
Bond order of 1.5 is shown by [CBSE AIPMT 2012]
A
O22-
B
O2
C
O2+
D
O2-
Question 3
If the 1st ionization energy of H atom is 13.6 eV, then the 2nd ionization energy of He atom is [West Bengla JEE 2012]
A
27.2 eV
B
40.8 eV
C
54.4 eV
D
108.8 eV
Question 4
The frequency of light emitted for the transition n = 4 to n = 2 of He+ is equal to the transition in H atom corresponding to which of the following [AIEEE 2011]
A
n = 4 to n = 3
B
n = 3 to n = 1
C
n = 2 to n = 1
D
n = 3 to n = 2
Question 5
The maximum number of electrons that can have principal quantum number, n = 3, and spin quantum number, ms = , is [IIT JEE 2011]
A
5
B
7
C
9
D
11
Question 6
The set of quantum numbers for the outermost electron for copper in its ground state is [Karnataka CET 2010]
A
3, 2, 2, + 1/2
B
4, 1, 1, + 1/2
C
4, 2, 2, + 1/2
D
4, 0, 0, + 1/2
Question 7
Calculate the wavelength (in nanometer) associated with a proton moving at 1.0 × 103 ms−1

(Mass of proton = 1.67 × 10−27 kg and h = 6.63 × 10−34 Js ) [AIEEE 2009]

A
0.032 nm
B
0.40 nm
C
2.5 nm
D
14.0 nm
Question 8
In an atom, an electron is moving with a speed of 600 m/s with an accuracy of 0.005%. Certainity with which the position of the electron can be located is (h = 6.6 × 10–34 kg m2s–1, mass of electron, em = 9.1 × 10–31 kg) [AIEEE 2009]
A
5.10 × 10–3 m
B
1.92 × 10–3 m
C
3.84 × 10–3 m
D
1.52 × 10–4 m
Question 9
The ionization enthalpy of hydrogen atom is 1.312 × 106 J mol−1. The energy required to excite the electron in the atom from n = 1 to n = 2 is [AIEEE 2008]
A
8.51 × 105 Jmol−1
B
6.56 × 105 Jmol−1
C
7.56 × 105 Jmol−1
D
9.84 × 105 Jmol−1
Question 10
When the azimuthal quantum number has the value of 2, the number of orbitals possible are [Karnataka CET 2008]
A
7
B
5
C
3
D
0
Question 11
Which of the following sets of quantum numbers represents the highest energy of an atom? [AIEEE 2007]
A
n = 3, l = 2,m = 1, s = +1/ 2
B
n = 3, l = 2,m = 1, s = +1/ 2
C
n = 4, l = 0,m = 0, s = +1/ 2
D
n = 3, l = 0,m = 0, s = +1/ 2
Question 12
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

(Note: h = 6.63 × 10-34 Js) [Karnataka CET 2007]

A
6.63 × 10-37m
B
6.63 × 10-31m
C
6.63 × 10-34m
D
6.63 × 10-35m
Question 13
Uncertainty in the position of an electron (mass = 9.1 × 10–31 kg) moving with a velocity 300 ms–1, accurate upto 0.001%, will be

(h = 6.63 × 10–34 Js) [AIEEE 2006]

A
19.2 × 10–2 m
B
5.76 × 10–2 m
C
1.92 × 10–2 m
D
3.84 × 10–2 m
Question 14
In a multi – electron atom, which of the following orbitals described by the three quantum numbers will have the same energy in the absence of magnetic acid and electric fields? [AIEEE 2005]

(a) n = 1, l = 0, m = 0

(b) n = 2, l = 0, m = 0

(c) n = 2, l = 1, m = 1

(d) n = 3, l = 2, m = 1

(e) n = 3, l = 2, m = 0

A
(a) and (b)
B
(b) and (c)
C
(c) and (d)
D
(d) and (e)
Question 15
Which of the following statements in relation to the hydrogen atom is correct? [AIEEE 205]
A
3s orbital is lower in energy than 3p orbital
B
3p orbital is lower in energy than 3d orbital
C
3s and 3p orbitals are of lower energy than 3d orbital
D
3s, 3p and 3d orbitals all have the same energy
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