SECTION D
Answer the following 9. nos. 23 to 25 in detail within the
limit of 90 to 120 words as directed : [4 marks each] 12
Chapter 3
1. What is mole? What is its unit? Give definition of molar
mass.
2. Calculate the molecular mass of the following:
(1) H20 ( 2 ) H2SO4 (3) CaCl2 (4) NH3
[Atomic mass: H-1, N-14, S-32, 0-16, Ca - 40, CI - 35.5]
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