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Q.

True statements with respect to molecular mass of a substance?

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a

Sum of the atomic masses of all the atoms in a molecule of the substance

b

Difference of the atomic masses of all the atoms in a molecule of the substance

c

Molecular mass is the total mass of a compound.

d

The molecular mass of a substance is the relative mass of its molecule as compared with the mass of a Carbon-12 atom taken as 12 units. 

answer is A, C, D.

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Detailed Solution

The molecular mass of a substance is the sum of the atomic masses of all the atoms in a molecule of the substance. It is also defined as the relative mass of its molecule as compared with the mass of a Carbon-12 atom taken as 12 units or the total mass of a compound.

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