Class 10 Physics · Chapter 11 · Test 3
Test 3: Complete Chapter 20 Review
30 questions · 25 min · 30 marks
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Sample questions
The first 5 of 30. Try each one, then tap to see the answer.
Question 1
In the beta decay of carbon-14, the daughter nucleus is:
- Anitrogen-14
- Bcarbon-13
- Cboron-14
- Doxygen-14
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Answer: A
¹⁴₆C → ¹⁴₇N + ⁰₋₁β + energy.
Question 2
The example of gamma decay given in the text is that of:
- ACobalt-60
- BUranium-238
- CCarbon-14
- DPolonium-210
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Answer: A
⁶⁰₂₇Co* → ⁶⁰₂₇Co + γ.
Question 3
Nuclear fission was first discovered in 1939 by:
- AOtto Hahn and Fritz Strassman
- BRutherford and Marsden
- CCurie and Becquerel
- DEinstein and Bohr
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Answer: A
They observed a uranium nucleus splitting after absorbing a slow-moving neutron.
Question 4
The average number of neutrons released per fission reaction is:
- A1
- B2.5
- C10
- D25
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Answer: B
Typically two or three per fission event, with an average of 2.5.
Question 5
In nuclear reactors, the chain reaction is controlled by:
- Aabsorbing extra neutrons
- Badding more uranium
- Cheating the core
- Dremoving electrons
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Answer: A
If uncontrolled, it can cause an explosion.
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