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Let N(beta) be the number of beta partic...

Let `N_(beta)` be the number of `beta` particles emitted by `1` gram of `Na^(24)` radioactive nuclei (half life `= 15` hrs) in `7.5` hours, `N_(beta)` is close to (Avogadro number `= 6.023 xx 10^(23) // "g. mole"`) :-

A

`6.2xx10^(21)`

B

`7.5xx10^(21)`

C

`1.25xx10^(22)`

D

`1.75xx10^(22)`

Text Solution

Verified by Experts

The correct Answer is:
B
The variation of average binding energy per nucleon with mass number A is shown in the figure.
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-ATOMS, MOLECULES AND NUCLEI -Exercise 1 (TOPICAL PROBLEMS)
  1. The curve of blinding energy per nucleon as a function of atomic mass ...

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  2. Atomic mass of ""6C^(13) is 1300335 amu and its mass number is 13.0 If...

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  3. Let N(beta) be the number of beta particles emitted by 1 gram of Na^(2...

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  4. A radioactive decay can form an isotope of the original nucleus with t...

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  5. The half-life of a radioactive substance is 20 min. the time taken bet...

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  6. A uranium nucleus ""(92)U^(238) emits and alpha-particle and a beta-pa...

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  7. ""(92)"U"^(235) undergoes successive disintegrations with the end prod...

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  8. A nucleus with Z =92 emits the following in a sequence: alpha,beta^(...

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  9. Half life of a radio-active substance is 20 minutes. The time between ...

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  10. The fraction of atoms of radioactive element that decays in 6 days is ...

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  11. A common example of beta^(-) decay is ""(15)P^(32) to ""(16)S^(32)+x+y...

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  12. The activity of a radioactive sample is measures as N0 counts per minu...

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  13. For the radioactive nuclei that undergo either alpha or beta decay, wh...

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  14. The radioactivity of a sample is l(1) at a time t(1) and l(2) time t(2...

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  15. A radioactive nucleus of mass number A, initially at rest, emits an al...

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  16. In a radioactive disintegration, the ratio of initial number of atoms ...

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  17. The activity of a radioactive sample is measured as 9750 counts per mi...

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  18. A radioactive sample S(1) having the activity A(1) has twice the numbe...

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  19. A radioactive material decays by simulataneous emission of two particl...

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  20. Number of nuclei of a radioactive substance at time t=0 are 2000 and 1...

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