A metal is treated with dilute hydrochloric acid in a test tube. A burning match stick is brought near the mouth of the test tube, but no sound is heard.
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2
Answer:
those are reactions
Explanation:
some produce sound and some does nót produce sound
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4
Answer :
A pop sound is heard when a lighted matchstick is brought near the mouth of a jar. This indicates the release of hydrogen gas.
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