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Question

Assertion :The nuclear fusion reaction releases less energy than the fission reaction. Reason: The nuclear fusion reaction takes place in the sun and other stars.

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Assertion is incorrect but Reason is correct
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Solution

The correct option is D Assertion is incorrect but Reason is correct

Assertion

The nuclear fusion reaction releases less energy than the fission reaction.

Reason

The nuclear fusion reaction takes place in the sun and other stars.

Assertion is incorrect but Reason is correct.

Fission only produces more energy than it consumes in large nuclei (common examples are Uranium & Plutonium, which have around 240 nucleons (nucleon = proton or neutron)). Fusion only produces more energy than it consumes in small nuclei (in stars, Hydrogen & its isotopes fusing into Helium).

Once these conditions are reached in the core of a star, nuclear fusion converts hydrogen atoms into helium atoms through a multi-stage process. ... This fusion cycle is known as the proton-proton chain, and it's the reaction that happens in stars with the mass of our Sun.


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