The electrolysis of aqueous solutions
1 mark · EasyName one piece of apparatus you would need to collect the gas produced at the cathode during the electrolysis of concentrated sodium chloride solution.
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Test tube
Also accept: test-tube; gas syringe; inverted test tube
Common mistakes: measuring cylinder; beaker
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Marking points
B1 · 1 mark · Test tube (or gas syringe) named as a suitable piece of apparatus.
Worked solution
A suitable piece of apparatus is a test tube.