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Q. No.Based on equation E = –2.178 × 10–18J, certain conclusions are written. Which of them is not correct?
| 1. | Larger the value of n, the larger the orbit radius. |
| 2. | Equation can be used to calculate the change in energy when the electron changes orbit. |
| 3. | For n = 1, the electron has a more negative energy than it does for n = 6 which means that the electron is more loosely bound in the smallest allowed orbit. |
| 4. | The negative sign in the equation simply means that the energy of the electron bound to the nucleus is lower than what it would be if the electrons were at an infinite distance from the nucleus. |
Subtopic: Bohr's Theory |
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The radii of the first bohr orbit of H(rH), He+ (rHe+) and Li2+(rLi2+) are in the order:
1. rH = rHe+ = rLi+2
2. rH < rHe+ < rLi2+
3. rH > rHe+ > rLi2+
4. rHe+ < rH < rLi2+
Subtopic: Bohr's Theory |
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Given below are two statements:
In the light of the above statements, choose the most appropriate answer from the options given below:
| Assertion (A): | The splitting of spectral lines in an electric field is called the stark effect. |
| Reason (R): | It is explained by Bohr's theory. |
In the light of the above statements, choose the most appropriate answer from the options given below:
| 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: Bohr's Theory |
69%
From NCERT
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