quantity having a mass equal to its atomic/molecular mass.
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B
quantity having mass equal to half of its atomic/molecular mass.
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C
one gram of any quantity.
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D
one kilogram of any quantity.
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Solution
The correct option is B quantity having a mass equal to its atomic/molecular mass. One mole is defined as a quantity having a mass equal to its atomic/molecular mass.
For example, one mole sodium(Na)=23gm= atomic mass of sodium