1. A (gas/liquid) has no definite shape but has a definite volume.
2. (Paper/Liquid) chromatography is used for the separation of amino acids (units of proteins)
3. A_ (physical/chemical) change is characterised by the formation of precipitate.
4. The stopcock is used to control the flow of a _ (heavier/lighter) liquid in a separating funnel.
5. (Fractional distillation/Sublimation) is used in oil refineries to separate the crude oil into various useful substances.
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1.liquid
2. Paper
3. chemical
4. heavier
5. fractional distillation
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