No nuclear waste is left at the end of which nuclear reaction?

1. nuclear fusion reaction
2. nuclear fission reaction
3. both a & b
4. none of these
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Answer: A
Explanation:
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Stable nuclei on bombardment with high speed particles produce radioactive unstable nuclei. This process by artificial means is known as:

1. nuclear fusion reaction
2. nuclear fission reaction
3. nuclear disintegration
4. artificial or induced radioactivity
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Answer: D
Explanation:
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Complete and balance the following nuclear equation: 0n1 + 13Al27 →?

1. 11Na23 + 2He5

2. 11Na24 + 2He4

3. 12Mg24 + 2He4

4. 12Mg25 + 1H3

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Answer: B
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₁₃Al²⁷ when bombarded with a neutron gives radioactive ₁₁Na²⁴ which disintegrates spontaneously by emission of a beta-particle and produces:

1. ₁₂Mg²⁵
2. ₁₁Na²³
3. ₁₂Mg²⁴
4. ₁₄Si²⁸
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Answer: C
Explanation:
• ₀n¹ + ₁₃Al²⁷ ࢐ ₁₁Na²⁴ + ₂He⁴ ; ₁₁Na²⁴ ࢐ ₁₂Mg²⁴ + _-1e⁰
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A pair of nuclei which have same number of protons and neutrons but different half-lives are called:

1. nuclear isomers
2. isobars
3. isotones
4. isochores
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Answer: A
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The nuclear isomers may be:

1. isotopic
2. isobaric
3. isotopic or isobaric
4. none of these
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Answer: C
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In nuclear reactions, a change in mass (Δm) is accompanied by:

1. radioactive decay

2. release of energy

3. transmutation

4. nuclear disintegration

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Answer: B
Explanation:
• Energy change is related with mass change by the following Einstein's equation,ΔE =Δmc2
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The difference between the calculated and experimental masses of the nucleus is known as;

1. mass defect
2. mass deficit
3. both a & b
4. critical mass
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Answer: C
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Mass defect of helium is:

1. 0.03040 amu
2. 0.00304 amu
3. 0.03428 amu
4. 0.00388 amu
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Answer: A
Explanation:
• Calculated mass of Helium = 4.03428, Experimental mass = 4.00388, Mass defect = 4.03428 - 4.00388 = 0.03040 amu
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The energy which binds the nucleons together in the nucleus is called:

1. critical energy
2. binding energy
3. nucleon energy
4. all of these
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Answer: B
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