- 1(current)
Q. No.Match Column-I (parameters) with Column-II (expressions) and mark the appropriate choice:
1. (A)→(iii), (B)→(iv), (C)→(i), (D)→(ii)
2. (A)→(ii), (B)→(i), (C)→(iv), (D)→(iii)
3. (A)→(iv), (B)→(iii), (C)→(i), (D)→(ii)
4. (A)→(i), (B)→(ii), (C)→(iv), (D)→(iii)
| Column-I (Parameters) |
Column-II (Expressions) |
||
| (A) | Uncertainty of an object | (i) | \({5.29 \times n^2} \over Z\) |
| (B) | Bohr's radius of an orbit | (ii) | \(h \over 4 \pi m\) |
| (C) | The angular momentum of an electron | (iii) | \(h \over mv\) |
| (D) | de Broglie wavelength | (iv) | \(n . { h \over 2 \pi}\) |
1. (A)→(iii), (B)→(iv), (C)→(i), (D)→(ii)
2. (A)→(ii), (B)→(i), (C)→(iv), (D)→(iii)
3. (A)→(iv), (B)→(iii), (C)→(i), (D)→(ii)
4. (A)→(i), (B)→(ii), (C)→(iv), (D)→(iii)
Subtopic: Bohr's Theory | Heisenberg Uncertainty Principle | De Broglie Equation |
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Level 1: 80%+
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The de-Broglie wavelength of a moving object having a mass 10 g and a velocity of 500 ms-1 will be:
1. 6.63 × 10-34 m
2. 3.18 × 10-36 m
3. 1.32 × 10-34 m
4. 2.46 × 10-32 m
1. 6.63 × 10-34 m
2. 3.18 × 10-36 m
3. 1.32 × 10-34 m
4. 2.46 × 10-32 m
Subtopic: De Broglie Equation |
89%
Level 1: 80%+
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For a golf ball weighing 200 g and traveling at 5 m/h, what is the approximate order of its associated wavelength?
1. \(10^{-10} \mathrm{~m}\)
2. \(10^{-20} \mathrm{~m}\)
3. \(10^{-30} \mathrm{~m}\)
4. \(10^{-40} \mathrm{~m}\)
1. \(10^{-10} \mathrm{~m}\)
2. \(10^{-20} \mathrm{~m}\)
3. \(10^{-30} \mathrm{~m}\)
4. \(10^{-40} \mathrm{~m}\)
Subtopic: De Broglie Equation |
86%
Level 1: 80%+
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The wavelength of a ball of mass 0.1 kg moving with a velocity of 10 m s–1 is:
1. 662.6 × 10–34 m
2. 66.26 × 10–34 m
3. 6.626 × 10–34 m
4. 6.626 × 10–36 m
Subtopic: De Broglie Equation |
83%
Level 1: 80%+
Hints
| Assertion (A): | The ground state configuration of Cr is 3d54s1. |
| Reason (R): | A set of half-filled orbitals containing one electron each with their spin parallel provides extra stability. |
| 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. |
Subtopic: De Broglie Equation |
83%
Level 1: 80%+
Hints
Calculate the de-Broglie wavelength for a particle having a mass of 1 kg and moving at a velocity of 100 m/s:
1. \(6.6 \times 10^{-33} \mathrm{~m}\)
2. \(6.6 \times 10^{-36} \mathrm{~m}\)
3. \(3.3 \times 10^{+33} \mathrm{~m}\)
4. \(3.3 \times 10^{-36} \mathrm{~m}\)
1. \(6.6 \times 10^{-33} \mathrm{~m}\)
2. \(6.6 \times 10^{-36} \mathrm{~m}\)
3. \(3.3 \times 10^{+33} \mathrm{~m}\)
4. \(3.3 \times 10^{-36} \mathrm{~m}\)
Subtopic: De Broglie Equation |
83%
Level 1: 80%+
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