Q.

Which type of reaction produces the most harmful radiation?

A. Fusion reaction
B. Fission reaction
C. Chemical reaction
D. Photo-Chemical reaction
Answer» B. Fission reaction
Explanation: Radiation is one of the byproducts of radioactive decay of unstable atomic nuclei. Nuclear fission is the process on which the operation of most nuclear power plants is based. When certain nuclei (for example that of uranium-235) are bombarded with neutrons, the nucleus splits into two smaller nuclei of roughly (though not exactly) equal sizes.
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