Left Panel
The first one is correct. NaHCO3 breaks down when mixed with vinegar and produces water Carbon Dioxide and Na which will combine with the acetate molecule in the vinegar.
NaHCO3 + HC2H3O2 → NaC2H3O2 + H2O + CO2 is the reaction.
Answer: A
Second from the left
It better not be any of the top three or stores are going to have a run on women's blouses. You have that one right. The other three are chemically neutral except for Ammonia which is basic in water (very week) although it does not smell that way.
Answer: D
Center
When you pick something like C, it cannot be anything but chemical. So C is not the answer.
Ionic bonds are also a chemical property.
Combustion is burning. That's chemical.
You have the right answer in D
Second panel from the right
The bottom three are all characteristics of bases. They are bitter. They are caustic (which means if they are strong enough they can destroy skin or deform it) they have a ph>7.
You have the right answer here A. They turn litmus paper blue.
Right Hand panel
Higher is correct. Pretty good score I'd say.
Answer A
