Sblock Elements
- sblock Elements 1 Question 21
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- sblock Elements 1 Question 1
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- sblock Elements 1 Question 30
- sblock Elements - Result Question 10
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- sblock Elements 1 Question 17 — JEE PYQ Chapterwise
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- sblock Elements 2 Question 16
- sblock Elements 1 Question 18 — JEE PYQ Chapterwise
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- sblock Elements 1 Question 16 — JEE PYQ Chapterwise
- sblock Elements 2 Question 17
- sblock Elements 1 Question 17 — JEE PYQ Chapterwise
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- sblock Elements 1 Question 18 — JEE PYQ Chapterwise
- sblock Elements 2 Question 20 — JEE PYQ Chapterwise
- sblock Elements 2 Question 19 — JEE PYQ Chapterwise
- sblock Elements 2 Question 20 — JEE PYQ Chapterwise
- sblock Elements 2 Question 22
- sblock Elements 2 Question 23
- sblock Elements - Result Question 27
- sblock Elements - Result Question 28
- sblock Elements - Result Question 29
- sblock Elements - Result Question 30
- sblock Elements 1 Question 15 — JEE PYQ Chapterwise
- sblock Elements - Result Question 31
- sblock Elements - Result Question 32
- sblock Elements 1 Question 16 — JEE PYQ Chapterwise
- sblock Elements - Result Question 33
- sblock Elements - Result Question 34
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- sblock Elements 1 Question 35
- sblock Elements - Result Question 67
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- sblock Elements - Result Question 71
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- sblock Elements 2 Question 1 — JEE PYQ Chapterwise
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- sblock Elements 2 Question 1 — JEE PYQ Chapterwise
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- sblock Elements 2 Question 15
- sblock Elements 2 Question 18
sblock Elements 1 Question 18 — JEE PYQ Chapterwise
14. The total number of isotopes of hydrogen and number of radioactive isotopes among them, respectively, are
(2019 Main, 10 Jan I)
(a) 2 and 1
(b) 3 and 2
(c) 2 and 0
(d) 3 and 1
Show Answer
Answer:
Correct Answer: 14. (d)
Solution:
- Hydrogen has three isotopes:
| ${ } _{1}^{1} \mathbf{H}$ | ${ } _{1}^{2} \mathbf{H}$ | ${ } _{1}^{3} \mathbf{H}$ | |
|---|---|---|---|
| Protium (P) | Deuterium (D) | Tritium (T) | |
| $p$ | 1 | 1 | 1 |
| $n$ | 0 | 1 | 2 |
| $\frac{n}{p}$ | 0 | 1 | 2 |
Only tritium (T) is radioactive, because of its very high $\frac{n}{p}$ value, $\left(\frac{n}{p}=2\right)$.
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