If you see a reaction in any test tube, bring a burning matchstick near the mouth of the test tube and see if you hear a pop sound.
Which of the following can be concluded based on this experiment?

A
Some non-metals react with HCl releasing chlorine gas
B
Some metals react with HCl releasing hydrogen gas
C
Some non-metals react with HCl releasing hydrogen gas.
D
Some metals and non-metals undergo rusting on reacting with HCl

Solution:

Some metals react with HCl releasing hydrogen gas

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