When making up a solution of accurately known volume, one has to allow the solution to reach room temperature before bringing the volume up to the mark because:
a) the same mass of a liquid will occupy different volumes at different temperatures
b) heat may be evolved when a liquid is added to a solid in a flask
c) heat may be evolved when two liquids are added together in a flask
d) none of the above is true
e) all of the above is true
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