Multiple choice

Which of the following statements is/are correct?

(a). The word “mole” was introduced in 1896 by Wilhelm Ostwald. (b). The mass of 1 mole of a substance is equal to its relative atomic or molecular mass in grams. (c). The quantity of a substance can be characterised by the valency of its molecules.

  1. (a) only

  2. (b) only

  3. (c) only

  4. (a) and (b)

  5. (a), (b) and (c)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is the correct answer. Both the statements (a) and (b) are correct.

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