Incorrect statement among the following is:
1. | The uncertainty principle is\(\Delta x \cdot \Delta p \geq \dfrac{h}{4 \pi} \) |
2. | Half-filled and fully filled orbitals have greater stability due to greater exchange energy, greater symmetry, and a more balanced arrangement. |
3. | The energy of the 2s orbital is less than the energy of the 2p orbital in the case of hydrogen-like atoms. |
4. | De-Broglie's wavelength is given by\(\lambda=\dfrac{h}{m v} \), where m= mass of the particle, v = group velocity of the particle. |
The incorrect statement among the following is:
1. | Total orbital angular momentum of an electron in 's' orbital is equal to zero. |
2. | An orbital is designated by three quantum numbers, while an electron in an atom is designated by four quantum numbers. |
3. | The electronic configuration of N atom is |
4. | The value of m for dz2 is zero. |
The correct set of four quantum numbers for the valence electron of a rubidium atom (Z =37) is:
1. | \(5,1,1,+ {1 \over2}\) | 2. | \(6,0,0,+ {1 \over2}\) |
3. | \(5,0,0,+ {1 \over2}\) | 4. | \(5,1,0,+ {1 \over2}\) |
The energies E1 and E2 of two radiations are 25 eV and 50 eV respectively. The relation between their wavelengths i.e., and will be:
1.
2.
3.
4.
The incorrect set of quantum numbers among the following is:
1. n= 4, l= 0, m= 0, s= -1/2
2. n= 5, l= 3, m= 0, s= +1/2
3. n= 3, l= 2, m= -3, s= -1/2
4. n= 3, l= 2, m= 2, s= -1/2
Orbital having 3 angular nodes and 3 total nodes is:
1. 5 p
2. 3 d
3. 4 f
4. 6 d
The maximum number of electrons in a subshell with l = 3 and n = 4 is
1. 14
2. 16
3. 10
4. 12
Assertion (A): | All d orbitals are tetra-lobed structures having two nodal planes. |
Reason (R): | Out of five, only four d-orbitals are degenerate orbitals. |
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | Both (A) and (R) are false. |