Filling of Orbitals in Atom
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CHXI02:STRUCTURE OF ATOM

307322 Which of the following sequence is correct as per Aufbau principle?

1 \({\rm{3}}\,{\rm{s}} < {\rm{3}}\,{\rm{d}} < {\rm{4 s}} < {\rm{4 p}}\)
2 \({\rm{1}}\,{\rm{s}}{\mkern 1mu} {\mkern 1mu} \, < {\rm{2}}\,{\rm{p}} < {\rm{4 s}} < {\mkern 1mu} {\rm{3}}\;{\rm{d}}\)
3 \({\rm{2\;s}}\,{\rm{ < }}\,{\rm{5\;s}}\,{\rm{ < }}\,{\rm{4p}}\,\,{\rm{ < 5\;d}}\)
4 \(2\;{\rm{s}} < 2\,{\rm{p}} < 3\;{\rm{d}} < 3{\rm{p}}\)
CHXI02:STRUCTURE OF ATOM

307323 Assertion :
5s-orbital has greater energy than \({\text{4s}}\).
Reason :
Energy of the orbital depends on the azimuthal quantum number along with principal quantam number, as per \((\mathrm{n}+1)\) rule.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXI02:STRUCTURE OF ATOM

307324 Consider the following pairs of electrons
\({\rm{(A)}}{\mkern 1mu} {\mkern 1mu} {\rm{(a)}}{\mkern 1mu} {\mkern 1mu} {\rm{n = 3,l = 2,}}\,\,{{\rm{m}}_{\rm{l}}}{\rm{ = 1,}}\,\,{{\rm{m}}_{\rm{s}}}{\rm{ = + }}\frac{{\rm{1}}}{{\rm{2}}}\)
\({\rm{(b)}}{\mkern 1mu} {\mkern 1mu} {\rm{n = 3,l = 2,}}\,\,{{\rm{m}}_{\rm{l}}}{\rm{ = 1,}}\,\,{{\rm{m}}_{\rm{s}}}{\rm{ = + }}\frac{{\rm{1}}}{{\rm{2}}}\)
\({\rm{(B)}}{\mkern 1mu} {\mkern 1mu} {\rm{(a)}}{\mkern 1mu} {\mkern 1mu} {\rm{n = 3,l = 2,}}\,\,{{\rm{m}}_{\rm{l}}}{\rm{ = - 2,}}\,\,{{\rm{m}}_{\rm{s}}}{\rm{ = - }}\frac{{\rm{1}}}{{\rm{2}}}\)
\({\mkern 1mu} {\rm{(b)}}{\mkern 1mu} {\mkern 1mu} {\rm{n = 3,l = 2,}}\,\,{{\rm{m}}_{\rm{l}}}{\rm{ = - 1,}}\,\,{{\rm{m}}_{\rm{s}}}{\rm{ = - }}\frac{{\rm{1}}}{{\rm{2}}}\)
\({\rm{(C)}}{\mkern 1mu} {\mkern 1mu} {\rm{(a)}}{\mkern 1mu} {\mkern 1mu} {\rm{n = 4,l = 2,}}\,{{\rm{m}}_{\rm{l}}}{\rm{ = 2,}}\,\,{{\rm{m}}_{\rm{s}}}{\rm{ = + }}\frac{{\rm{1}}}{{\rm{2}}}\)
\({\rm{(b)}}{\mkern 1mu} {\rm{n = 3,l = 2,}}\,\,{{\rm{m}}_{\rm{l}}}{\rm{ = 2,}}\,\,{{\rm{m}}_{\rm{s}}}{\rm{ = + }}\frac{{\rm{1}}}{{\rm{2}}}\)
The pairs of electron present in degenerate orbitals is / are :

1 Only A
2 Only B
3 Only C
4 (B) and (C)
JEE - 2022
CHXI02:STRUCTURE OF ATOM

307325 The two electrons have the following set of quantum numbers
\({\rm{P = 3, 2, - 2, + 1/2}}\)
\(Q = 3,0,0, + 1/2\)
Which of the following statement is true?

1 P has greater energy than Q
2 P and Q represent same electron
3 P and Q have the same energy
4 P has lesser energy than Q
KCET - 2015
CHXI02:STRUCTURE OF ATOM

307326 When 4d-orbital is complete, the newly entering electrons goes into

1 \({\rm{5f}}\)
2 \({\rm{5s}}\)
3 \({\rm{5p}}\)
4 \({\rm{6d}}\,\,{\rm{orbital}}\)
NEET DIGITAL LIBRARY
CHXI02:STRUCTURE OF ATOM

307322 Which of the following sequence is correct as per Aufbau principle?

1 \({\rm{3}}\,{\rm{s}} < {\rm{3}}\,{\rm{d}} < {\rm{4 s}} < {\rm{4 p}}\)
2 \({\rm{1}}\,{\rm{s}}{\mkern 1mu} {\mkern 1mu} \, < {\rm{2}}\,{\rm{p}} < {\rm{4 s}} < {\mkern 1mu} {\rm{3}}\;{\rm{d}}\)
3 \({\rm{2\;s}}\,{\rm{ < }}\,{\rm{5\;s}}\,{\rm{ < }}\,{\rm{4p}}\,\,{\rm{ < 5\;d}}\)
4 \(2\;{\rm{s}} < 2\,{\rm{p}} < 3\;{\rm{d}} < 3{\rm{p}}\)
CHXI02:STRUCTURE OF ATOM

307323 Assertion :
5s-orbital has greater energy than \({\text{4s}}\).
Reason :
Energy of the orbital depends on the azimuthal quantum number along with principal quantam number, as per \((\mathrm{n}+1)\) rule.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXI02:STRUCTURE OF ATOM

307324 Consider the following pairs of electrons
\({\rm{(A)}}{\mkern 1mu} {\mkern 1mu} {\rm{(a)}}{\mkern 1mu} {\mkern 1mu} {\rm{n = 3,l = 2,}}\,\,{{\rm{m}}_{\rm{l}}}{\rm{ = 1,}}\,\,{{\rm{m}}_{\rm{s}}}{\rm{ = + }}\frac{{\rm{1}}}{{\rm{2}}}\)
\({\rm{(b)}}{\mkern 1mu} {\mkern 1mu} {\rm{n = 3,l = 2,}}\,\,{{\rm{m}}_{\rm{l}}}{\rm{ = 1,}}\,\,{{\rm{m}}_{\rm{s}}}{\rm{ = + }}\frac{{\rm{1}}}{{\rm{2}}}\)
\({\rm{(B)}}{\mkern 1mu} {\mkern 1mu} {\rm{(a)}}{\mkern 1mu} {\mkern 1mu} {\rm{n = 3,l = 2,}}\,\,{{\rm{m}}_{\rm{l}}}{\rm{ = - 2,}}\,\,{{\rm{m}}_{\rm{s}}}{\rm{ = - }}\frac{{\rm{1}}}{{\rm{2}}}\)
\({\mkern 1mu} {\rm{(b)}}{\mkern 1mu} {\mkern 1mu} {\rm{n = 3,l = 2,}}\,\,{{\rm{m}}_{\rm{l}}}{\rm{ = - 1,}}\,\,{{\rm{m}}_{\rm{s}}}{\rm{ = - }}\frac{{\rm{1}}}{{\rm{2}}}\)
\({\rm{(C)}}{\mkern 1mu} {\mkern 1mu} {\rm{(a)}}{\mkern 1mu} {\mkern 1mu} {\rm{n = 4,l = 2,}}\,{{\rm{m}}_{\rm{l}}}{\rm{ = 2,}}\,\,{{\rm{m}}_{\rm{s}}}{\rm{ = + }}\frac{{\rm{1}}}{{\rm{2}}}\)
\({\rm{(b)}}{\mkern 1mu} {\rm{n = 3,l = 2,}}\,\,{{\rm{m}}_{\rm{l}}}{\rm{ = 2,}}\,\,{{\rm{m}}_{\rm{s}}}{\rm{ = + }}\frac{{\rm{1}}}{{\rm{2}}}\)
The pairs of electron present in degenerate orbitals is / are :

1 Only A
2 Only B
3 Only C
4 (B) and (C)
JEE - 2022
CHXI02:STRUCTURE OF ATOM

307325 The two electrons have the following set of quantum numbers
\({\rm{P = 3, 2, - 2, + 1/2}}\)
\(Q = 3,0,0, + 1/2\)
Which of the following statement is true?

1 P has greater energy than Q
2 P and Q represent same electron
3 P and Q have the same energy
4 P has lesser energy than Q
KCET - 2015
CHXI02:STRUCTURE OF ATOM

307326 When 4d-orbital is complete, the newly entering electrons goes into

1 \({\rm{5f}}\)
2 \({\rm{5s}}\)
3 \({\rm{5p}}\)
4 \({\rm{6d}}\,\,{\rm{orbital}}\)
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CHXI02:STRUCTURE OF ATOM

307322 Which of the following sequence is correct as per Aufbau principle?

1 \({\rm{3}}\,{\rm{s}} < {\rm{3}}\,{\rm{d}} < {\rm{4 s}} < {\rm{4 p}}\)
2 \({\rm{1}}\,{\rm{s}}{\mkern 1mu} {\mkern 1mu} \, < {\rm{2}}\,{\rm{p}} < {\rm{4 s}} < {\mkern 1mu} {\rm{3}}\;{\rm{d}}\)
3 \({\rm{2\;s}}\,{\rm{ < }}\,{\rm{5\;s}}\,{\rm{ < }}\,{\rm{4p}}\,\,{\rm{ < 5\;d}}\)
4 \(2\;{\rm{s}} < 2\,{\rm{p}} < 3\;{\rm{d}} < 3{\rm{p}}\)
CHXI02:STRUCTURE OF ATOM

307323 Assertion :
5s-orbital has greater energy than \({\text{4s}}\).
Reason :
Energy of the orbital depends on the azimuthal quantum number along with principal quantam number, as per \((\mathrm{n}+1)\) rule.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXI02:STRUCTURE OF ATOM

307324 Consider the following pairs of electrons
\({\rm{(A)}}{\mkern 1mu} {\mkern 1mu} {\rm{(a)}}{\mkern 1mu} {\mkern 1mu} {\rm{n = 3,l = 2,}}\,\,{{\rm{m}}_{\rm{l}}}{\rm{ = 1,}}\,\,{{\rm{m}}_{\rm{s}}}{\rm{ = + }}\frac{{\rm{1}}}{{\rm{2}}}\)
\({\rm{(b)}}{\mkern 1mu} {\mkern 1mu} {\rm{n = 3,l = 2,}}\,\,{{\rm{m}}_{\rm{l}}}{\rm{ = 1,}}\,\,{{\rm{m}}_{\rm{s}}}{\rm{ = + }}\frac{{\rm{1}}}{{\rm{2}}}\)
\({\rm{(B)}}{\mkern 1mu} {\mkern 1mu} {\rm{(a)}}{\mkern 1mu} {\mkern 1mu} {\rm{n = 3,l = 2,}}\,\,{{\rm{m}}_{\rm{l}}}{\rm{ = - 2,}}\,\,{{\rm{m}}_{\rm{s}}}{\rm{ = - }}\frac{{\rm{1}}}{{\rm{2}}}\)
\({\mkern 1mu} {\rm{(b)}}{\mkern 1mu} {\mkern 1mu} {\rm{n = 3,l = 2,}}\,\,{{\rm{m}}_{\rm{l}}}{\rm{ = - 1,}}\,\,{{\rm{m}}_{\rm{s}}}{\rm{ = - }}\frac{{\rm{1}}}{{\rm{2}}}\)
\({\rm{(C)}}{\mkern 1mu} {\mkern 1mu} {\rm{(a)}}{\mkern 1mu} {\mkern 1mu} {\rm{n = 4,l = 2,}}\,{{\rm{m}}_{\rm{l}}}{\rm{ = 2,}}\,\,{{\rm{m}}_{\rm{s}}}{\rm{ = + }}\frac{{\rm{1}}}{{\rm{2}}}\)
\({\rm{(b)}}{\mkern 1mu} {\rm{n = 3,l = 2,}}\,\,{{\rm{m}}_{\rm{l}}}{\rm{ = 2,}}\,\,{{\rm{m}}_{\rm{s}}}{\rm{ = + }}\frac{{\rm{1}}}{{\rm{2}}}\)
The pairs of electron present in degenerate orbitals is / are :

1 Only A
2 Only B
3 Only C
4 (B) and (C)
JEE - 2022
CHXI02:STRUCTURE OF ATOM

307325 The two electrons have the following set of quantum numbers
\({\rm{P = 3, 2, - 2, + 1/2}}\)
\(Q = 3,0,0, + 1/2\)
Which of the following statement is true?

1 P has greater energy than Q
2 P and Q represent same electron
3 P and Q have the same energy
4 P has lesser energy than Q
KCET - 2015
CHXI02:STRUCTURE OF ATOM

307326 When 4d-orbital is complete, the newly entering electrons goes into

1 \({\rm{5f}}\)
2 \({\rm{5s}}\)
3 \({\rm{5p}}\)
4 \({\rm{6d}}\,\,{\rm{orbital}}\)
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CHXI02:STRUCTURE OF ATOM

307322 Which of the following sequence is correct as per Aufbau principle?

1 \({\rm{3}}\,{\rm{s}} < {\rm{3}}\,{\rm{d}} < {\rm{4 s}} < {\rm{4 p}}\)
2 \({\rm{1}}\,{\rm{s}}{\mkern 1mu} {\mkern 1mu} \, < {\rm{2}}\,{\rm{p}} < {\rm{4 s}} < {\mkern 1mu} {\rm{3}}\;{\rm{d}}\)
3 \({\rm{2\;s}}\,{\rm{ < }}\,{\rm{5\;s}}\,{\rm{ < }}\,{\rm{4p}}\,\,{\rm{ < 5\;d}}\)
4 \(2\;{\rm{s}} < 2\,{\rm{p}} < 3\;{\rm{d}} < 3{\rm{p}}\)
CHXI02:STRUCTURE OF ATOM

307323 Assertion :
5s-orbital has greater energy than \({\text{4s}}\).
Reason :
Energy of the orbital depends on the azimuthal quantum number along with principal quantam number, as per \((\mathrm{n}+1)\) rule.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXI02:STRUCTURE OF ATOM

307324 Consider the following pairs of electrons
\({\rm{(A)}}{\mkern 1mu} {\mkern 1mu} {\rm{(a)}}{\mkern 1mu} {\mkern 1mu} {\rm{n = 3,l = 2,}}\,\,{{\rm{m}}_{\rm{l}}}{\rm{ = 1,}}\,\,{{\rm{m}}_{\rm{s}}}{\rm{ = + }}\frac{{\rm{1}}}{{\rm{2}}}\)
\({\rm{(b)}}{\mkern 1mu} {\mkern 1mu} {\rm{n = 3,l = 2,}}\,\,{{\rm{m}}_{\rm{l}}}{\rm{ = 1,}}\,\,{{\rm{m}}_{\rm{s}}}{\rm{ = + }}\frac{{\rm{1}}}{{\rm{2}}}\)
\({\rm{(B)}}{\mkern 1mu} {\mkern 1mu} {\rm{(a)}}{\mkern 1mu} {\mkern 1mu} {\rm{n = 3,l = 2,}}\,\,{{\rm{m}}_{\rm{l}}}{\rm{ = - 2,}}\,\,{{\rm{m}}_{\rm{s}}}{\rm{ = - }}\frac{{\rm{1}}}{{\rm{2}}}\)
\({\mkern 1mu} {\rm{(b)}}{\mkern 1mu} {\mkern 1mu} {\rm{n = 3,l = 2,}}\,\,{{\rm{m}}_{\rm{l}}}{\rm{ = - 1,}}\,\,{{\rm{m}}_{\rm{s}}}{\rm{ = - }}\frac{{\rm{1}}}{{\rm{2}}}\)
\({\rm{(C)}}{\mkern 1mu} {\mkern 1mu} {\rm{(a)}}{\mkern 1mu} {\mkern 1mu} {\rm{n = 4,l = 2,}}\,{{\rm{m}}_{\rm{l}}}{\rm{ = 2,}}\,\,{{\rm{m}}_{\rm{s}}}{\rm{ = + }}\frac{{\rm{1}}}{{\rm{2}}}\)
\({\rm{(b)}}{\mkern 1mu} {\rm{n = 3,l = 2,}}\,\,{{\rm{m}}_{\rm{l}}}{\rm{ = 2,}}\,\,{{\rm{m}}_{\rm{s}}}{\rm{ = + }}\frac{{\rm{1}}}{{\rm{2}}}\)
The pairs of electron present in degenerate orbitals is / are :

1 Only A
2 Only B
3 Only C
4 (B) and (C)
JEE - 2022
CHXI02:STRUCTURE OF ATOM

307325 The two electrons have the following set of quantum numbers
\({\rm{P = 3, 2, - 2, + 1/2}}\)
\(Q = 3,0,0, + 1/2\)
Which of the following statement is true?

1 P has greater energy than Q
2 P and Q represent same electron
3 P and Q have the same energy
4 P has lesser energy than Q
KCET - 2015
CHXI02:STRUCTURE OF ATOM

307326 When 4d-orbital is complete, the newly entering electrons goes into

1 \({\rm{5f}}\)
2 \({\rm{5s}}\)
3 \({\rm{5p}}\)
4 \({\rm{6d}}\,\,{\rm{orbital}}\)
NEET DIGITAL LIBRARY
CHXI02:STRUCTURE OF ATOM

307322 Which of the following sequence is correct as per Aufbau principle?

1 \({\rm{3}}\,{\rm{s}} < {\rm{3}}\,{\rm{d}} < {\rm{4 s}} < {\rm{4 p}}\)
2 \({\rm{1}}\,{\rm{s}}{\mkern 1mu} {\mkern 1mu} \, < {\rm{2}}\,{\rm{p}} < {\rm{4 s}} < {\mkern 1mu} {\rm{3}}\;{\rm{d}}\)
3 \({\rm{2\;s}}\,{\rm{ < }}\,{\rm{5\;s}}\,{\rm{ < }}\,{\rm{4p}}\,\,{\rm{ < 5\;d}}\)
4 \(2\;{\rm{s}} < 2\,{\rm{p}} < 3\;{\rm{d}} < 3{\rm{p}}\)
CHXI02:STRUCTURE OF ATOM

307323 Assertion :
5s-orbital has greater energy than \({\text{4s}}\).
Reason :
Energy of the orbital depends on the azimuthal quantum number along with principal quantam number, as per \((\mathrm{n}+1)\) rule.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXI02:STRUCTURE OF ATOM

307324 Consider the following pairs of electrons
\({\rm{(A)}}{\mkern 1mu} {\mkern 1mu} {\rm{(a)}}{\mkern 1mu} {\mkern 1mu} {\rm{n = 3,l = 2,}}\,\,{{\rm{m}}_{\rm{l}}}{\rm{ = 1,}}\,\,{{\rm{m}}_{\rm{s}}}{\rm{ = + }}\frac{{\rm{1}}}{{\rm{2}}}\)
\({\rm{(b)}}{\mkern 1mu} {\mkern 1mu} {\rm{n = 3,l = 2,}}\,\,{{\rm{m}}_{\rm{l}}}{\rm{ = 1,}}\,\,{{\rm{m}}_{\rm{s}}}{\rm{ = + }}\frac{{\rm{1}}}{{\rm{2}}}\)
\({\rm{(B)}}{\mkern 1mu} {\mkern 1mu} {\rm{(a)}}{\mkern 1mu} {\mkern 1mu} {\rm{n = 3,l = 2,}}\,\,{{\rm{m}}_{\rm{l}}}{\rm{ = - 2,}}\,\,{{\rm{m}}_{\rm{s}}}{\rm{ = - }}\frac{{\rm{1}}}{{\rm{2}}}\)
\({\mkern 1mu} {\rm{(b)}}{\mkern 1mu} {\mkern 1mu} {\rm{n = 3,l = 2,}}\,\,{{\rm{m}}_{\rm{l}}}{\rm{ = - 1,}}\,\,{{\rm{m}}_{\rm{s}}}{\rm{ = - }}\frac{{\rm{1}}}{{\rm{2}}}\)
\({\rm{(C)}}{\mkern 1mu} {\mkern 1mu} {\rm{(a)}}{\mkern 1mu} {\mkern 1mu} {\rm{n = 4,l = 2,}}\,{{\rm{m}}_{\rm{l}}}{\rm{ = 2,}}\,\,{{\rm{m}}_{\rm{s}}}{\rm{ = + }}\frac{{\rm{1}}}{{\rm{2}}}\)
\({\rm{(b)}}{\mkern 1mu} {\rm{n = 3,l = 2,}}\,\,{{\rm{m}}_{\rm{l}}}{\rm{ = 2,}}\,\,{{\rm{m}}_{\rm{s}}}{\rm{ = + }}\frac{{\rm{1}}}{{\rm{2}}}\)
The pairs of electron present in degenerate orbitals is / are :

1 Only A
2 Only B
3 Only C
4 (B) and (C)
JEE - 2022
CHXI02:STRUCTURE OF ATOM

307325 The two electrons have the following set of quantum numbers
\({\rm{P = 3, 2, - 2, + 1/2}}\)
\(Q = 3,0,0, + 1/2\)
Which of the following statement is true?

1 P has greater energy than Q
2 P and Q represent same electron
3 P and Q have the same energy
4 P has lesser energy than Q
KCET - 2015
CHXI02:STRUCTURE OF ATOM

307326 When 4d-orbital is complete, the newly entering electrons goes into

1 \({\rm{5f}}\)
2 \({\rm{5s}}\)
3 \({\rm{5p}}\)
4 \({\rm{6d}}\,\,{\rm{orbital}}\)