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 Form 3 Chemistry Paper 1 Sample Revision Questions With Answers

Form one students wanted to prepare hydrogen gas in the laboratory. They reacted Zinc granules and dilute nitric (V) acid.
a). Explain the observation made.
b). State one use of hydrogen gas.

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Answer Text:
a).No effervescence/ No hydrogen gas was collected because the hydrogen gas that was produced was immediately oxidized to water by the nitric (V) acid which is an oxidizing agent.
b).- Used for meteorological research
since it’s less dense than air.
- Used as a fuel in rockets
-Use in the Harbor process for the manufacture of ammonia
- Use in oxy-hydrogen flame