A. 5
B. 10
C. 20
D. 30
Related Mcqs:
- 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 - The amount of a radioisotope remaining undecayed after a time equal to four times its half life, will be _____________ percent?
A. 3.125
B. 6.25
C. 12.50
D. 25 - 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 - 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 - The radioisotope used to study the thyroid gland is__________________?
A. Iodine
B. Cobalt
C. Iron
D. Carbon - 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 - The half life period of a radioactive element depends on its _______________________?
A. Temperature
B. Pressure
C. Amount
D. None of these - The half life period of a radioactive element depends upon the___________________?
A. Temperature
B. Pressure
C. Amount of element present
D. None of these - A radioactive isotope undergoes decay with respect to time following _____________ law?
A. Logarithmic
B. Exponential
C. Linear
D. Inverse square - Which one is the radioactive isotope of hydrogen ?
A. Deuterium
B. Ortho-hydrogen
C. Tritium
D. None of these
