13 What is the boiling point of ethanol at 720 mm Hg when its normal point at 760 mm Hg is known to be 78.3 o C
75.3oC
76.3oC
−3oC
−2oC
14 Which of these best describes a phenomenon whereby a solid suddenly shrinks before melting?
Sublimation
Shrinking
Sintering
Evaporation
15 How many layers are usually formed in a separating funnel?
4
3
2
1
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