The half life period of a radioactive element is 100 days. After 400 days, one gm of the element will be reduced to ______________ gm?
Correct answer: D. 1/16
- A. 1/4
- B. 1/8
- C. 1/2
- D. 1/16
Explanation
Four hundred days contain four half-lives of 100 days, so the amount becomes 1 × (1/2)^4 = 1/16 gram. Each half-life halves the quantity remaining, regardless of the starting amount.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
Practise Chemical Process Principles
2,710 free Chemical Process Principles MCQs from Chemical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemical Engineering questions like this
Chemical Engineering is on this paper prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for it.
More Chemical Process Principles questions
Radioactivity of an isotope is expressed in______________________?
When the difference between mass number and atomic number of atoms of two or more elements are same, the atoms are termed as____________________?
"Critical mass" is the minimum mass of nuclear fissile material required for the_______________________?
The mass number of an element is not changed, when it emits _______________ radiations?
The half life period of a radioactive element depends upon the___________________?
The half life period of a radioactive element depends on its _______________________?