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Standard XII

Chemistry

Extraction of Aluminium

An uranium or...

Question

An uranium ore sample contains 1g U^238 and 0.2 g Pb^206. Assume that all Pb ^206 is obtained from U^238. The t1/2 of U^238 is 4.5 ×10^9 years. The age of Uranium ore sample is Option (1) 3× 10^9 (2) 1.5× 10^9 (3) 4×10^9 (4)3× 10^8

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Similar questions

A sample of uranium rock from moon contains equimolar amounts of $U^{238}$ and $P b^{206}$ . The age of the rock will be $(t_{\frac{1}{2}} f o r U^{238} = 4.5 \times 10^{9} y r s)$

Q. In an ore containing uranium the ratio of

U^{238}

P b^{206}

nuclei in

3

. Calculate the age of ore, assuming that all the lead present in the ore is the final stable product of

U^{238} . t_{1 / 2}

for

U^{238} = 4.5 \times 10^{9} y e a r

_{921} U^{238}

by successive radioactivity decays changes to

_{82} P b^{206}

.A sample of uranium ore was analyzed and found to contain 1.0g of

U^{238}

and

0.1

g of

P b^{206}

. Assuming that all the

P b^{206}

had accumulated due to decay of

U^{238}

,find out the age of the ore ?(Half life of

U^{238} = 4.5 * 10^{9} y e a r s) .

Q. A sample of

U^{238}

(half-life

= 4.5 \times 10^{9}

years) ore is found to contain

23.8 g

U^{238}

and

20.6 g

P b^{206}

. The age of the ore is:

Q. A sample of

U^{238}

( half life

4.5 \times 10^{9}

yr) ore is found to contain 23.8 g of

U^{238}

and 20.6 g of

P b^{206} .

Calculate the age of the ore?

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