The amount of a radioisotope remaining undecayed after a time equal to four times its half life, will be _____________ percent?

Related Mcqs:

1. If 4 gm of a radioisotope has a half life period of 10 days, the half life of 2 gm of the same isotope will be ____________ days?

   A. 5 B. 10 C. 20 D. 30...

2. The amount of a radioactive material (having a half life of 100 years) remaining after 400 years will be ______________ of its original weight?

   A. 1/2 B. 1/4 C. 1/8 D. 1/16...

3. The half life period of a radioactive substance is best determined by counting the number of alpha particles emitted per second in a Geiger Muller counter from its known quantity. If the half life period of a radioactive substance is one month, then____________?

   A. 3/4th of it will disintegrate in two months B. It will completely disintegrate in two months C. It will completely disintegrate in four months D. 1/8th of it will remain intact at the end of four months...

4. The radioisotope used to study the thyroid gland is__________________?

   A. Iodine B. Cobalt C. Iron D. Carbon...

5. What is the average life of a radioactive atom having a ‘half life period’ of T ?

   A. 1.44 T B. 0.144 T C. 14.4 T D. 2T...

6. 75% of a radioactive element decays in 6 hours. Its half life period is ______________ hours?

   A. 3/4 B. 1/6 C. 3 D. 4...

7. The half life period of a radioactive element depends on its _______________________?

   A. Temperature B. Pressure C. Amount D. None of these...

8. The half life period of a radioactive element depends upon the___________________?

   A. Temperature B. Pressure C. Amount of element present D. None of these...

9. The half life period of a radioactive element is 100 days. After 400 days, one gm of the element will be reduced to ______________ gm?

   A. 1/4 B. 1/8 C. 1/2 D. 1/16...

10. Quantity of fissionable material (i.e. U-235) in natural uranium is _____________ percent?

    A. 0.71 B. 6.31 C. 99.29 D. 12.73...