# 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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