Q. 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) white-coloured precipitate is formed

B) only neutralisation reaction occurs, no gas is released

C) H2 gas comes out with pop sound

D) CO2 gas comes out with brisk effervescence

✔ Correct Answer: CO2 gas comes out with brisk effervescence

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