Q20 of 56 Page 83

Which of the following will have maximum mass?

2 moles of H2O has less number of moles as well as less molecular mass among all the given options. Hence, it has maximum mass. Thus, option D is correct.

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18

One mole of H2O means:

i. 18 g of H2O


ii. 6.022 x 1023 molecules of H2O


iii. 180 g of H2O


iv. 1.8 of H2O

 19

A molecule can be defined as the:

 1

Write true or false for the following statements:

Oxygen molecule exists in the form of three molecules as O2, O3 and O4.

 2

Write true or false for the following statements:

Sodium shows valency of Na+ and Na2+.