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Shape of Orbitals - (Concept)
Shape of s orbital: spherical
Shape of p orbital: Dumb-bell
Shape of d orbital: Double Dumb-bell
| Exam | Chapter |
| JEE MAIN | Atomic Structure |
The number of the nodal plane in a px – orbital is
| A. |
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| D. |
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Lobes of d – orbital which lie between axes are
| A. |
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The lobes of px-orbitals are directed along
| A. |
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| D. |
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The maximum probability of finding an electron in the $d_{x y}$ orbital is
| A. |
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| B. |
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| C. |
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| D. |
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Orbital is
| A. |
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| B. |
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| D. |
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The correct statement about probability density (except at a distance from the nucleus) is:-
| A. |
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| B. |
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| C. |
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| D. |
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A combination of two atomic orbitals leads to the formation of how many molecular orbitals?
| A. |
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| B. |
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| C. |
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| D. |
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The main axis of a diatomic molecule is Z of AO. Px and Py overlap to form which of the following orbitals?
| A. |
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| B. |
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| D. |
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Shape of s orbital is:
| A. |
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| B. |
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| C. |
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| D. |
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The number of nodal plane in a px – orbital is:
| A. |
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| B. |
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| D. |
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The number of radial nodes of 3s and 2p orbital are respectively:
| A. |
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| D. |
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The number of given orbitals which have electron density along the axis is
| A. |
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For $2 P_x$ and $3 d_{x y}$ nodal plane are respectively
| A. |
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Shape of 2s orbital is :-
| A. |
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| B. |
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| C. |
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Given below are two statements :
Statement (I) : A spectral line will be observed for a $2 \mathrm{p}_{\mathrm{x}} \rightarrow 2 \mathrm{p}_{\mathrm{y}}$ transition.
Statement (II) : $2 \mathrm{p}_{\mathrm{x}}$ and $2 \mathrm{p}_{\mathrm{y}}$ are degenerate orbitals.
In the light of the above statements, choose the correct answer from the options given below :
| A. |
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| B. |
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| C. |
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| D. |
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Which of the following is/are not correct with respect to energy of atomic orbitals of hydrogen atom?
(A) 1 s $<2$ p $<3$ d $<4$ s
(B) $1 \mathrm{~s}<2 \mathrm{~s}=2 \mathrm{p}<3 \mathrm{~s}=3 \mathrm{p}$
(C) 1s $<2$ s $<2$ p $<3$ s $<3$ p
(D) $1 \mathrm{~s}<2 \mathrm{~s}<4 \mathrm{~s}<3 \mathrm{~d}$
Choose the correct answer from the options given below:
| A. |
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| B. |
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| C. |
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| D. |
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Shape of $3 d_z{^2}$ orbital is
| A. |
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| B. |
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| D. |
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The probability density plots of 1s and 2s orbitals are given in the following figures.
The density of dots in a region represents the probability density of finding electrons in the region. On the basis of the above diagram, which of the following statements is incorrect?
| A. |
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| B. |
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| C. |
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| D. |
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The total number of atomic orbitals in fourth energy level of an atom is
| A. |
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For 1s orbital, the probability density is maximum at the nucleus and it decreases sharply as we move away from it. On the other hand, for 2s orbital, the
probability density first decreases sharply to zero and again starts increasing. After reaching a small maxima it decreases again and approaches zero as the value of r increases further. The region where this probability density function reduces to zero is called nodal surfaces or simply nodes.
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- Atomic Models
- Developments leading to the Bohr’s model of atom
- Particle Nature of electromagnetic radiation
- Photoelectric Effect
- Line Spectrum of hydrogen
- Bohr model for hydrogen atom
- Dual behavior of matter
- Heisenberg’s uncertainty principle
- Elementary ideas of quantum mechanics
- Quantum mechanical model of atom
- Quantum Numbers (Concept)
- Shape of Orbitals (Concept)
- Radial nodes and planar nodes (Concept)
- Aufbau Principle, Pauli Exclusion Principle and Hund's Rule of Maximum Multiplicity (Concept)
- Electronic configuration of any element (Concept)
- Stability of Completely filled and Half-filled Subshells (Concept)
