Q. No.
The graph that represents the probability density vs distance of the electron from the nucleus for 2s orbital is -
1.
2.
3.
4.
The graph that represents the variation of (probability of density of finding the electron) with distance (r) is given below:
The number of nodes as per the graph is-
1. zero
2. 1
3. 2
4. Cannot predict
The graph represents the variation of the wave function with distance from the nucleus.
The atomic orbital represented by above-mentioned graph is -
1. 1s
2. 2s
3. 2p
4. None of the above
Match the following:
|
Column I |
Column II |
|
(a) n = 2, l =1 |
i = 4s |
|
(b) n = 4, l = 0 |
ii = 2p |
|
(c) n = 5, l = 3 |
iii = 3d |
|
(d) n = 3, l = 2 |
iv = 5f |
1. a = iv; b = ii; c = i; d = iii
2. a = ii; b = iii; c = iv; d = i
3. a = ii; b = i; c = iv; d = iii
4. a = iii; b = ii; c = i; d = iv
Consider the following graph.
The correct relation between T1 and T2 is-
1. T1 > T2
2. T1 < T2
3. T1 = T2
4. None of the above
The correct statement(s) among the following regarding quantum numbers is -
| a. | Angular quantum number determines the three-dimensional shape of the orbital |
| b. | The principal quantum number determines the orientation and energy of the orbital |
| c. | Magnetic quantum number determines the size of the orbital |
| d. | Spin quantum number of an electron determines the orientation of the spin of the electron relative to the chosen axis |
1. (a), (d)
2. (b), (c)
3. (c), (d)
4. (b), (d)
| Assertion (A): | The number of radial nodes in 3 dz2 , is zero. |
| Reason (R): | The number of angular nodes of atomic orbitals is equal to the value of l. |
| 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. | (A) is false but (R) is true. |
| Assertion (A): | The radius of the second orbit of He+ is equal to that of the first orbit of hydrogen. |
| Reason (R): | The radius of an orbit in hydrogen-like species is directly proportional to n and inversely proportional to Z. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of the (A). |
| 2. | Both (A) and (R) are True and (R) is not the correct explanation of the (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
| Assertion (A): | The angular momentum of an electron in an atom is quantized. |
| Reason (R): | In an atom, only those orbits are permitted in which the angular momentum of the electron is a natural number multiple of h/2π. |
| 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. | (A) is false but (R) is true. |
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