1.

If we take a small amount of washing soda and add approximately 1 mL of dilute hydrochloric acid to it, what will we observe?

A. only neutralisation reaction occurs, no gas is released
B. white-coloured precipitate is formed
C. CO2 gas comes out with brisk effervescence
D. H2 gas comes out with pop sound
Answer» D. H2 gas comes out with pop sound


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