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The age of most ancient geological forma...

The age of most ancient geological formations is estimated by a)`C-14` dating method b)`K-Ag` method c)`U-Pb` method d)`Ra-Rn` method

A

potassium argon method

B

carbon 14 dating method `

C

radium silicon method

D

uranium lead method

Text Solution

Verified by Experts

The correct Answer is:
D
The age of most ancient geological objects is determined by uranium lead method. This methos is based on the radoactive porperties of uranium. In theis methos,we assume that initially the rock did not contain any lead , we can calculate the age of the rock by measuring the ratio of concentrations of `_(92)U^(238)nd _(82)Pb^(206)`
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NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)-Nuclear Chemistry-Exercise
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  2. The radioactive isotope CO^(60) which is used in the treatment of canc...

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  3. The radio iostope, tritium (H^(3)) has a half life of 12:3 yr. If the ...

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  4. ""(92)U""^(235) nucleus absorbes a neutron and disintegrate into ""(54...

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  5. If X^(a) species emit firstly a positron then two alpha and beta last...

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  6. A human body required the 0.01 M activity of radioactive substance aft...

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  7. The half-life of a radioactive isotope is 3 h. if the initial mass of ...

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  8. The half life of C^(14)(lambda=2.31xx10^(-4) per year) is

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  9. In the following radioactive decay x^(232)rarry^(220) how many alpha a...

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  10. Sulphur 35(34,96903 amu) emits a beta- particles but no gamma-rays. Th...

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  11. Number of neutrons i8n a parent nucleus X, which gives ""(7)^(14)N aft...

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  12. Carbon 14 dating method is based on the fact that

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  13. U^(235) + n^(1)rarr fission product + neutron + 3.2xx 10^(-11)j. The e...

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  14. One microgram of radioactie sodium Na^(24) with a half life of 15 h wa...

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  15. 20 mg of C-14 has half-life of 5760 yr. 100 mg of sample containing C-...

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  16. In a radioactive decay, an emitted electron comes from

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  17. If an isotope of hydrogen has two neutrons in its atom, its atomic num...

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  18. Emission of an alpha paritcle leads to a

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  19. The age of most ancient geological formations is estimated by a)C-14 d...

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