State whether the given reaction is true or false:
A quantity of uranium-235 less than the critical mass supports a chain reaction.
A
True
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B
False
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Solution
The correct option is B False A quantity of uranium-235 less than the critical mass cannot support a chain reaction. If the mass of uranium-235 is less than the critical mass, the chain reaction will be non sustainable. Critical mass is the minimum mass of fissionable material required to sustain a chain reaction.