NEET Chemistry Atomic & Molecular Mass MCQ Question
Which of the following statements about atomic and molecular mass is correct?
1 mole of any substance contains 6.022 × 10²³ entities, regardless of the substance's mass.
The atomic mass of an element is always equal to its molecular mass.
1 mole of water molecules equals 6.022 × 10²³ water molecules, but has a mass that varies with temperature.
Molecular mass is defined as the mass of one mole of atoms expressed in grams.
Correct Answer
Detailed Explanation
Statement A correctly reflects that 1 mole contains Avogadro's number of entities, as stated in the context. Statement B is incorrect because atomic and molecular masses differ. Statement C is misleading since the mass of water does not vary with temperature, and Statement D misdefines molecular mass.
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