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In an experiment to investigate the conductivity of a substance a student used the set up shown below. The student noticed that the bulb did...

In an experiment to investigate the conductivity of a substance a student used the set up shown below. The student noticed that the bulb did not light.

(i) What had been omitted in the set up?
(ii) Explain why the bulb lights up when the omission is corrected.

Answers

(i) Heat

(ii) PbBr₂ melts. Molten PbBr₂ contains mobile ions which conduct electric current.

maurice.mutuku answered the question on September 4, 2019 at 07:10

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