engineering recuitment ICAR Technician 2021 Mock Test (Re-Exam) General Science Chemistry Chemical Reaction
If we take a small amount of washing soda and add approximately 1 mL of dilute hydrochloric acid to it, what will we observe?
1
White-coloured precipitate is formed.
2
CO2 gas comes out with brisk effervescence.
3
H2 gas comes out with pop sound.
4
Only neutralisation reaction occurs, no gas is released.