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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 | |