Home
Class 12
PHYSICS
A sample of .(53)I^(131), as I^(ɵ) ion, ...

A sample of `._(53)I^(131)`, as `I^(ɵ)` ion, was administered to a patient in a carrier conissting `1.0 mg` of stable `I^(ɵ)` ion. After `4.0` days, `60%` of the initial radioactivity was detected in the thyroid gland of the patient. What mass of the stable `I^(ɵ)` ion had migrated to the thyroid gland? (Given: `t_(1//2)` of `I^(131) = 8` days)

A

`65.8%`

B

`95.%`

C

`85.8%`

D

`75.8%`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Similar Questions

Explore conceptually related problems

A sample of ._(53)I^(131) , as iodide ion, was administered to a patient in a carrier consisting of 0.10 mg of stable iodide ion. After 4.00 days 67.7% of the initial radiactivity was detected in the thyroid gland of the patient. What mass of the stable iodide ion had migrated to the thyroid gland? Of what diagnostic value of is such an experiment? (t_(1//2) = 8 days)

The half - life of I ^ (131) is 8 days. Given a sample of I^(131) at time t = 0 , we can assert that

The half - life of I^(131) is 8 days. Given a sample of I^(131) at time t = 0 , we can assert that

Cl_(2) + 2I^(-) to 2CI^(-) + I_(2) , was carried out in water . Initial concentration of iodide ion was 0.25 mol L^(-1) and the conc. after 10min was 0.20 molL^(-1) . Calculate the rate of appearance of iodine.

At 25^(@)C,4.0g of NaOH are dissolced in eater to produce soluton of volume 1 litre .Find (i) molarity of the solution (II) OH^(-) ion concentration (II) pH value of the solution. At masses (in u) , Na=23,O=16,H=1 )

Iiodine -131 is a radioactive isdotpe. If 1.0 mg of ""^(131)I has an activity of 4.6xx10""^(12) Bq. What is the half-life of ""^(131)I (in days)

The reaction S_(2)O_(8)^(2-) + 3I^(ɵ) rarr 2SO_(4)^(2-) + I_(3)^(ɵ) is of first order both with respect to persulphate and iofide ions. Taking the initial concentration as a and b , respectively, and taking x as the concentration of the triofide at time t , a differential rate equation can be written. Two suggested mechanism for the reaction are: I. S_(2)O_(8)^(2-)+I^(ɵ) hArr SO_(4)I^(ɵ)+SO_(4)^(2-) ("fast") I^(ɵ)+SO_(4)I^(ɵ) overset(k_(1))rarrI_(2) + SO_(4)^(2-) (show) I^(ɵ) + I_(2) overset(k_(2))rarr I_(3)^(ɵ) ("fast") II. S_(2)O_(8)^(2-) + I^(ɵ) overset(k_(1))rarr S_(2)O_(8) I^(2-) (slow) S_(2)O_(8)I^(3-) overset(k_(2))rarr2SO_(4)^(2-)+I^(o+) ("fast") I^(o+) + I^(ɵ) overset(k_(3)) rarr I_(2) ("fast") I_(2) + I^(o+) overset(k_(4))rarr I_(3)^(ɵ) ("fast") The general difference equation for the above reaction is

The reaction S_(2)O_(8)^(2-) + 3I^(ɵ) rarr 2SO_(4)^(2-) + I_(3)^(ɵ) is of first order both with respect to persulphate and iofide ions. Taking the initial concentration as a and b , respectively, and taking x as the concentration of the triofide at time t , a differential rate equation can be written. Two suggested mechanism for the reaction are: I. S_(2)O_(8)^(2-)+I^(ɵ) hArr SO_(4)I^(ɵ)+SO_(4)^(2-) ("fast") I^(ɵ)+SO_(4)I^(ɵ) overset(k_(1))rarrI_(2) + SO_(4)^(2-) (show) I^(ɵ) + I_(2) overset(k_(2))rarr I_(3)^(ɵ) ("fast") II. S_(2)O_(8)^(2-) + I^(ɵ) overset(k_(1))rarr S_(2)O_(8) I^(2-) (slow) S_(2)O_(8)I^(3-) overset(k_(2))rarr2SO_(4)^(2-)+I^(o+) ("fast") I^(o+) + I^(ɵ) overset(k_(3)) rarr I_(2) ("fast") I_(2) + I^(o+) overset(k_(4))rarr I_(3)^(ɵ) ("fast") For the reaction I_(2)+2S_(2)O_(3)^(2-) rarr S_(4)O_(6)^(2-) + 2I^(ɵ) I. (-d[I_(2)])/(dt) = -(1)/(2) (d[S_(2)O_(3)^(2-)])/(dt) II. (-d[I_(2)])/(dt) = -2 (d[S_(2)O_(3)^(2-)])/(dt) III. (-d[I_(2)])/(dt) = -2 (d[I^(ɵ)])/(dt) xx (d[S_(2)O_(3)^(2-)])/(dt) IV. (d[S_(4)O_(6)^(2-)])/(dt) = (1)/(2)(d[I^(ɵ)])/(dt) The correct option is

The following reaction was carried out in water : Cl_(2) + 2I^(ɵ) rarr I_(2) + 2Cl^(ɵ) The initial concentration of I^(ɵ) was 0.25 mol L^(-1) and the concentration after 10 min was 0.23 mol L^(-1) . Calculate the rate of disappearance of I^(ɵ) and rate of appearance of I_(2) .

A radioactive substance disintegrates at as rate proportional to the amount of substance present. If 50% f the given amount disintegrates in 1600 years. What percentage of the substance disintegrates i 10 years ? (-log2)/(160)T a k ee=0. 9957