REFERENCE SECTION: TESTS for GASES Complete the Table below, which summarizes tests for ten common gases, by inserting the correct observation from this list: bleaches; blue; brown; dark-blue; decolourizes; green; milky-white; pink; 'pop'; red; relights; white.
* Liquid and solid alkenes are immiscible with bromine water and with alkaline potassium manganate(VII); accordingly, they require warming or shaking. Note that alkanes also react with bromine: but such reactions are very slow indeed - particularly in the absence of light - so the orange-brown colour of bromine water usually remains.
REFERENCE SECTION: LABORATORY PREPARATIONS of GASES Complete the Table below, which summarizes the laboratory preparations of six common gases, by completing the balanced symbol equations.
* Each preparation is routinely executed, in a well-ventilated fume cupboard, wearing safety glasses. Most gases can be dried by passage through calcium chloride, silica gel, or concentrated sulfuric acid; however, the corrosive nature of the latter drying agent introduces a unnecessary safety hazard.
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