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BASIC OF LIFE - CELLS MCQs

Half Life, Diversity Of Life, Cell The Unit Of Life

Total Questions : 115 | Page 10 of 12 pages
Question 91. What is the most penetrating radiation?
  1.    gamma
  2.    alpha
  3.    beta
  4.    positron
 Discuss Question
Answer: Option A. -> gamma
Question 92. Which sample would have the least amount remaining after 1 minute?
  1.    100g of Francium-220
  2.    100g of Potassium-37
  3.    100g of Neon-19
  4.    100g of Nitrogen-16
 Discuss Question
Answer: Option B. -> 100g of Potassium-37
Question 93. Which of the following samples would have the greatest amount remaining after 28 days?
  1.    5g of Au-198
  2.    10g of I-131
  3.    5g of P-32
  4.    10g of Rn-222
 Discuss Question
Answer: Option C. -> 5g of P-32
Question 94. Why does gamma decay occur?
  1.    The nucleus is too large to be stable
  2.    The proton to neutron ratio is unstable
  3.    The nucleus is in an excited state. This usually follows other types of decay.
  4.    The nucleus is too small to be viable by itself
 Discuss Question
Answer: Option C. -> The nucleus is in an excited state. This usually follows other types of decay.
Question 95. Why does beta decay occur?
  1.    The nucleus is too large to be stable
  2.    The proton to neutron ratio is unstable
  3.    The nucleus is in an excited state. This usually follows other types of decay.
  4.    The nucleus is too small to be viable by itself
 Discuss Question
Answer: Option B. -> The proton to neutron ratio is unstable
Question 96. You have 100 grams of radioactive C-14
  1.    100 grams
  2.    25 grams
  3.    2 grams
  4.    50 grams
 Discuss Question
Answer: Option D. -> 50 grams
Question 97. Which type of radiation penetrates paper and skin, but can be stopped by a thin sheet of metal?
  1.    Alpha
  2.    Beta
  3.    Gamma
  4.    All of above
 Discuss Question
Answer: Option B. -> Beta
Question 98. _________________ is when two smaller atoms combine to form a larger more stable atom
  1.    fission
  2.    fusion
 Discuss Question
Answer: Option B. -> fusion
Question 99. When is the rate of radioactive decay the fastest?
  1.    end
  2.    beginning
  3.    middle
  4.    None of these
 Discuss Question
Answer: Option B. -> beginning
Question 100. Iodine-131 has a half life of 8
  1.    1/2
  2.    1/4
  3.    1/8
  4.    1/16
 Discuss Question
Answer: Option B. -> 1/4

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