MCQOPTIONS
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MCQOPTIONS
This section includes 11242 Mcqs, each offering curated multiple-choice questions to sharpen your Joint Entrance Exam - Main (JEE Main) knowledge and support exam preparation. Choose a topic below to get started.
| 1501. |
Which of the following sets is possible for quantum numbers [RPET 2003] |
| A. | \[n=4,\,l=3,\,m=-2,\,s=0\] |
| B. | \[n=4,\,l=4,\,m=+2,\,s=-\frac{1}{2}\] |
| C. | \[n=4,\,l=4,\,m=-2,\,s=+\frac{1}{2}\] |
| D. | \[n=4,\,l=3,\,m=-2,\,s=+\frac{1}{2}\] |
| Answer» E. | |
| 1502. |
Electronic configuration \[1{{s}^{2}},\,2{{s}^{2}}2{{p}^{6}},\,3{{s}^{2}}3{{p}^{6}}3{{d}^{5}},\,4{{s}^{1}}\] represents [CPMT 2003] |
| A. | Ground state |
| B. | Excited state |
| C. | Anionic state |
| D. | All of these |
| Answer» B. Excited state | |
| 1503. |
Number of orbitats in h sub-shell is [BHU 2003] |
| A. | 11 |
| B. | 15 |
| C. | 17 |
| D. | 19 |
| Answer» B. 15 | |
| 1504. |
The quantum number ?m? of a free gaseous atom is associated with [AIIMS 2003] |
| A. | The effective volume of the orbital |
| B. | The shape of the orbital |
| C. | The spatial orientation of the orbital |
| D. | The energy of the orbital in the absence of a magnetic field |
| Answer» D. The energy of the orbital in the absence of a magnetic field | |
| 1505. |
Correct statement is [BHU 2003] |
| A. | \[K=4{{s}^{1}},\,\,Cr=3{{d}^{4}}4{{s}^{2}},\,\,Cu=3{{d}^{10}}4{{s}^{2}}\] |
| B. | \[K=4{{s}^{2}},\,\,Cr=3{{d}^{4}}4{{s}^{2}},\,\,Cu=3{{d}^{10}}4{{s}^{2}}\] |
| C. | \[K=4{{s}^{2}},\,\,Cr=3{{d}^{5}}4{{s}^{1}},\,\,Cu=3{{d}^{10}}4{{s}^{2}}\] |
| D. | \[K=4{{s}^{1}},\,\,Cr=3{{d}^{5}}4{{s}^{1}},\,\,Cu=3{{d}^{10}}4{{s}^{1}}\] |
| Answer» E. | |
| 1506. |
An element has the electronic configuration \[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{2}}\]. Its valency electrons are [NCERT 1973] |
| A. | 6 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 1507. |
Which of the following set of quantum number is not possible [Pb. PMT 2002] |
| A. | n-3 l-2 \[{{m}_{1}}\]-1 \[{{m}_{2}}\]- +1/2 |
| B. | n ? 3 l ? 2 \[{{m}_{1}}\]-1 \[{{m}_{2}}\]- ? 1/2 |
| C. | n ? 3 l ? 2 \[{{m}_{1}}\]-1 \[{{m}_{2}}\]- 0 |
| D. | n ? 5 l ? 2 \[{{m}_{1}}\]- ? 1 \[{{m}_{2}}\]- + 1/2 |
| Answer» D. n ? 5 l ? 2 \[{{m}_{1}}\]- ? 1 \[{{m}_{2}}\]- + 1/2 | |
| 1508. |
The outer electronic structure \[3{{s}^{2}}3{{p}^{5}}\] is possessed by [Pb. PMT 2002; Pb. CET 2001] |
| A. | Cl |
| B. | O |
| C. | Ar |
| D. | Br |
| Answer» B. O | |
| 1509. |
The total magnetic quantum numbers for d-orbital is given by [Orissa JEE 2002] |
| A. | 2 |
| B. | 0, ± 1, ± 2 |
| C. | 0, 1, 2 |
| D. | 5 |
| Answer» E. | |
| 1510. |
Quantum numbers of an atom can be defined on the basis of [AIIMS 2002] |
| A. | Hund?s rule |
| B. | Aufbau?s principle |
| C. | Pauli?s exclusion principle |
| D. | Heisenberg?s uncertainty principle |
| Answer» D. Heisenberg?s uncertainty principle | |
| 1511. |
Which of the following has maximum energy [AIIMS 2002] |
| A. | |
| B. | |
| C. | |
| D. | |
| Answer» C. | |
| 1512. |
Azimuthal quantum number defines [AIIMS 2002] |
| A. | e/m ratio of electron |
| B. | Spin of electron |
| C. | Angular momentum of electron |
| D. | Magnetic momentum of electron |
| Answer» D. Magnetic momentum of electron | |
| 1513. |
The magnetic quantum number of valence electron of sodium (Na) is [RPMT 2002] |
| A. | 3 |
| B. | 2 |
| C. | 1 |
| D. | 0 |
| Answer» E. | |
| 1514. |
The quantum numbers \[n=2,\,\,l=1\] represent [AFMC 2002] |
| A. | 1s orbital |
| B. | 2s orbital |
| C. | 2p orbital |
| D. | 3d orbital |
| Answer» D. 3d orbital | |
| 1515. |
When the value of azimuthal quantum number is 3, magnetic quantum number can have values [DPMT 2001] |
| A. | + 1, 0, ? 1 |
| B. | + 2, + 1, 0, ? 1, ? 2 |
| C. | ? 3, ? 2, ? 1, ? 0, + 1, + 2, + 3 |
| D. | + 1, ? 1 |
| Answer» D. + 1, ? 1 | |
| 1516. |
Principal quantum number of an atom represents [EAMCET 1979; IIT 1983; MNR 1990;UPSEAT 2000, 02] |
| A. | Size of the orbital |
| B. | Spin angular momentum |
| C. | Orbital angular momentum |
| D. | Space orientation of the orbital |
| Answer» B. Spin angular momentum | |
| 1517. |
Which of the following set of quantum numbers is correct for the 19th electron of chromium [DCE 2001] |
| A. | n-3 l-0 m-0 s- 1/2 |
| B. | n-3 l-2 m- ? 2 s- 1/2 |
| C. | n-4 l-0 m- 0 s- ½ |
| D. | n-4 l-1 m- ?1 s- ½ |
| Answer» D. n-4 l-1 m- ?1 s- ½ | |
| 1518. |
Which of the following sets of quantum number is not possible [MP PET 2001] |
| A. | \[n=3;\,l=+2;\,m=0;\,s=+\frac{1}{2}\] |
| B. | \[n=3;\,l=0;\,m=0;\,s=-\frac{1}{2}\] |
| C. | \[n=3;\,l=0;\,m=-1;\,s=+\frac{1}{2}\] |
| D. | \[n=3;\,l=1;\,m=0;\,s=-\frac{1}{2}\] |
| Answer» D. \[n=3;\,l=1;\,m=0;\,s=-\frac{1}{2}\] | |
| 1519. |
Which one pair of atoms or ions will have same configuration [JIPMER 2001] |
| A. | \[{{F}^{+}}\] and \[Ne\] |
| B. | \[L{{i}^{+}}\] and \[H{{e}^{-}}\] |
| C. | \[C{{l}^{-}}\] and \[Ar\] |
| D. | \[Na\] and K |
| Answer» D. \[Na\] and K | |
| 1520. |
Which of the following set of quantum number is not valid [AIIMS 2001] |
| A. | \[n=1,\,\,l=2\] |
| B. | \[3=2,\,\,m=1\] |
| C. | \[m=3,\,\,l=0\] |
| D. | \[3=4,\,\,l=2\] |
| Answer» B. \[3=2,\,\,m=1\] | |
| 1521. |
Which of the following set of quantum numbers is possible [AIIMS 2001] |
| A. | \[n=3;\,\,l=2;\,\,m=2\] and \[s=+\frac{1}{2}\] |
| B. | \[n=3;\,\,l=4;\,\,m=0\] and \[s=-\frac{1}{2}\] |
| C. | \[n=4;\,l=0;\,\,m=2\] and \[s=+\frac{1}{2}\] |
| D. | \[n=4;\,\,l=4;\,\,m=3\] and \[s=+\frac{1}{2}\] |
| Answer» B. \[n=3;\,\,l=4;\,\,m=0\] and \[s=-\frac{1}{2}\] | |
| 1522. |
The electronic configuration of an element is \[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{6}}3{{d}^{5}}4{{s}^{1}}\]. This represents its [IIT Screening 2000] |
| A. | Excited state |
| B. | Ground state |
| C. | Cationic form |
| D. | Anionic form |
| Answer» C. Cationic form | |
| 1523. |
Which of the following electronic configurations is not possible [CPMT 2000] |
| A. | \[1{{s}^{2}}\,\,2{{s}^{2}}\] |
| B. | \[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}\] |
| C. | \[3{{d}^{10}}4{{s}^{2}}4{{p}^{2}}\] |
| D. | \[1{{s}^{2}}2{{s}^{2}}\,2{{p}^{2}}3{{s}^{1}}\] |
| Answer» E. | |
| 1524. |
Electronic configuration of ferric ion is [RPET 2000] |
| A. | \[[Ar]\,3{{d}^{5}}\] |
| B. | \[[Ar]\,3{{d}^{7}}\] |
| C. | \[[Ar]\,3{{d}^{3}}\] |
| D. | \[[Ar]\,3{{d}^{8}}\] |
| Answer» B. \[[Ar]\,3{{d}^{7}}\] | |
| 1525. |
What is the maximum number of electrons which can be accommodated in an atom in which the highest principal quantum number value is 4 [MP PMT 2000] |
| A. | 10 |
| B. | 18 |
| C. | 32 |
| D. | 54 |
| Answer» D. 54 | |
| 1526. |
Which set of quantum numbers for an electron of an atom is not possible [RPMT; DCE 1999] |
| A. | \[n=1,\,l=0,\,m=0,\,s=+1/2\] |
| B. | \[n=1,\,l=1,\,m=1,\,s=+1/2\] |
| C. | \[n=1,l=0,\,m=0,\,s=-1/2\] |
| D. | \[n=2,\,l=1,\,m=-1,\,s=+1/2\] |
| Answer» C. \[n=1,l=0,\,m=0,\,s=-1/2\] | |
| 1527. |
Which of the following orbital is not possible [RPMT 1999] |
| A. | 3 f |
| B. | 4 f |
| C. | 5 f |
| D. | 6 f |
| Answer» B. 4 f | |
| 1528. |
The quantum numbers for the outermost electron of an element are given below as \[n=2,\,l=0,\,m=0,\,s=+\frac{1}{2}\]. The atoms is [EAMCET 1978] |
| A. | Lithium |
| B. | Beryllium |
| C. | Hydrogen |
| D. | Boron |
| Answer» B. Beryllium | |
| 1529. |
The number of quantum numbers required to describe an electron in an atom completely is [CET Pune 1998] |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 1530. |
An \[{{e}^{-}}\] has magnetic quantum number as \[-3\], what is its principal quantum number [BHU 1998] |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 1531. |
The electronic configuration \[1{{s}^{2}}2{{s}^{2}}2p_{x}^{1}2p_{y}^{1}2p_{z}^{1}\] [AFMC 1997; Pb. PMT 1999; CBSE PMT 2001; AIIMS 2001] |
| A. | Oxygen |
| B. | Nitrogen |
| C. | Hydrogen |
| D. | Fluorine |
| Answer» C. Hydrogen | |
| 1532. |
Which of the following sets of quantum numbers is not allowed [Orissa JEE 1997] |
| A. | \[n=1,\,l=0,\,m=0,\,s=+\frac{1}{2}\] |
| B. | \[n=1,\,l=1,\,m=0,\,s=-\frac{1}{2}\] |
| C. | \[n=2,\,l=1,\,m=1,\,s=+\frac{1}{2}\] |
| D. | \[n=2,\,l=1,\,m=0,\,s=-\frac{1}{2}\] |
| Answer» C. \[n=2,\,l=1,\,m=1,\,s=+\frac{1}{2}\] | |
| 1533. |
The electronic configuration of gadolinium (atomic no. 64) is [CBSE PMT 1997] |
| A. | \[[Xe]4{{s}^{8}}5{{d}^{9}}6{{s}^{2}}\] |
| B. | \[[Xe]4{{s}^{7}}5{{d}^{1}}6{{s}^{2}}\] |
| C. | \[[Xe]4{{s}^{3}}5{{d}^{5}}6{{s}^{2}}\] |
| D. | \[[Xe]4{{f}^{6}}5{{d}^{2}}6{{s}^{2}}\] |
| Answer» C. \[[Xe]4{{s}^{3}}5{{d}^{5}}6{{s}^{2}}\] | |
| 1534. |
Electronic configuration of \[{{H}^{-}}\] is [CPMT 1985] |
| A. | \[1{{s}^{0}}\] |
| B. | \[1{{s}^{1}}\] |
| C. | \[1{{s}^{2}}\] |
| D. | \[1{{s}^{1}}\,2{{s}^{1}}\] |
| Answer» D. \[1{{s}^{1}}\,2{{s}^{1}}\] | |
| 1535. |
If \[n+l=6\], then total possible number of subshells would be [RPMT 1997] |
| A. | 3 |
| B. | 4 |
| C. | 2 |
| D. | 5 |
| Answer» B. 4 | |
| 1536. |
An electron having the quantum numbers \[n=4,\,l=3,\,m=0\], \[s=-\frac{1}{2}\] would be in the orbital [Orissa JEE 1997] |
| A. | \[3s\] |
| B. | \[3p\] |
| C. | \[4d\] |
| D. | \[4f\] |
| Answer» E. | |
| 1537. |
Electronic configuration of \[S{{c}^{21}}\] is [BHU 1997] |
| A. | \[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{6}}4{{s}^{2}}3{{d}^{1}}\] |
| B. | \[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{6}}4{{s}^{1}}3{{d}^{2}}\] |
| C. | \[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{6}}4{{s}^{0}}3{{d}^{3}}\] |
| D. | \[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{2}}4{{s}^{2}}3{{d}^{2}}\] |
| Answer» B. \[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{6}}4{{s}^{1}}3{{d}^{2}}\] | |
| 1538. |
Five valence electrons of \[{{p}^{15}}\] are labelled as If the spin quantum of \[B\] and \[Z\] is \[+\frac{1}{2}\], the group of electrons with three of the quantum number same are [JIPMER 1997] |
| A. | \[AB,\,XYZ,\,BY\] |
| B. | \[AB\] |
| C. | \[XYZ,\,AZ\] |
| D. | \[AB,\,XYZ\] |
| Answer» C. \[XYZ,\,AZ\] | |
| 1539. |
When the principal quantum number \[(n=3)\], the possible values of azimuthal quantum number (\[l\]) is [Bihar MEE 1996; KCET 2000] |
| A. | 0, 1, 2, 3 |
| B. | 0, 1, 2 |
| C. | ? 2, ? 1, 0, 1, 2 |
| D. | 1, 2, 3 |
| E. | 0, 1 |
| Answer» C. ? 2, ? 1, 0, 1, 2 | |
| 1540. |
\[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{1}}\] shows configuration of [CPMT 1996] |
| A. | \[A{{l}^{3+}}\] in ground state |
| B. | \[Ne\] in excited state |
| C. | \[M{{g}^{+}}\] in excited state |
| D. | None of these |
| Answer» D. None of these | |
| 1541. |
Which statement is not correct for \[n=5\], \[m=3\] [CPMT 1996] |
| A. | \[l=4\] |
| B. | \[l=0,\,1,\,3;\,s=+\frac{1}{2}\] |
| C. | \[l=3\] |
| D. | All are correct |
| Answer» B. \[l=0,\,1,\,3;\,s=+\frac{1}{2}\] | |
| 1542. |
Which one is in the ground state [DPMT 1996] |
| A. | |
| B. | |
| C. | |
| D. | |
| Answer» C. | |
| 1543. |
For the \[n=2\] energy level, how many orbitals of all kinds are possible [Bihar CEE 1995] |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» D. 5 | |
| 1544. |
Which of the following set of quantum numbers belong to highest energy [CPMT 1999] |
| A. | \[n=4,\,l=0,\,m=0,\,s=+\frac{1}{2}\] |
| B. | \[n=3,\,l=0,\,m=0,\,s=+\frac{1}{2}\] |
| C. | \[n=3,\,l=1,\,m=1,\,s=+\frac{1}{2}\] |
| D. | \[n=3,\,l=2,\,m=1,\,s=+\frac{1}{2}\] |
| Answer» E. | |
| 1545. |
Which quantum number will determine the shape of the subshell [CPMT 1999; Pb. PMT 1998] |
| A. | Principal quantum number |
| B. | Azimuthal quantum number |
| C. | Magnetic quantum number |
| D. | Spin quantum number |
| Answer» C. Magnetic quantum number | |
| 1546. |
2p orbitals have [NCERT 1981; MP PMT 1993, 97] |
| A. | \[n=1,\,l=2\] |
| B. | \[n=1,\,l=0\] |
| C. | \[n=2,\,l=1\] |
| D. | \[n=2,\,l=0\] |
| Answer» D. \[n=2,\,l=0\] | |
| 1547. |
The correct electronic configuration of \[Ti(Z=22)\] atom is [MP PMT 1999] |
| A. | \[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{6}}4{{s}^{2}}3{{d}^{2}}\] |
| B. | \[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{6}}3{{d}^{4}}\] |
| C. | \[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{6}}3{{d}^{4}}\] |
| D. | \[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{6}}4{{s}^{1}}3{{d}^{3}}\] |
| Answer» B. \[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{6}}3{{d}^{4}}\] | |
| 1548. |
What is the electronic configuration of \[C{{u}^{2+}}(Z=29)\] of least position [MP PET/PMT 1998; MP PET 2001] |
| A. | \[[Ar]\,4{{s}^{1}}3{{d}^{8}}\] |
| B. | \[[Ar]\,4{{s}^{2}}3{{d}^{10}}4{{p}^{1}}\] |
| C. | \[[Ar]\,4{{s}^{1}}3{{d}^{10}}\] |
| D. | \[[Ar]\,3{{d}^{9}}\] |
| Answer» E. | |
| 1549. |
The set of quantum numbers \[n=3,\,l=0,\,m=0,\,s=-1/2\] belongs to the element |
| A. | \[Mg\] |
| B. | \[Na\] |
| C. | \[Ne\] |
| D. | \[F\] |
| Answer» B. \[Na\] | |
| 1550. |
Which of the following sets of orbitals may degenerate |
| A. | \[2s,\,2{{p}_{x}},\,2{{p}_{y}}\] |
| B. | \[3s,\,3{{p}_{x}},3{{d}_{xy}}\] |
| C. | \[1s,\,2s,\,3s\] |
| D. | \[2{{p}_{x}},\,2{{p}_{y}},\,2{{p}_{z}}\] |
| Answer» E. | |