Some Additional Chemistry Exam questions+answers

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1. Sodium Chlordie does not conduct electricity when it is solid. Explain, in terms of ions, why sodium chlordie solution conducts electricity?

Answer: The ions carry the charge needed to conduct because of free electrons.

2. Why are chloride ions attracted to positive electrodes?

Answer: Opposite charges attract.

3.What could cause an anomalous result in an experiment?

Answer: Gas escapes, measurement error, timing error etc.

4. How could you check the reliability of a set of results?

Answer: Repeat the experiment, compare results with another set for the same experiment with the same method.

5. Explain why metals can be shaped.

Answer: Made of layers/atoms/ions/particles/rows which can slide/slip


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