Wthese 2 questions i have a quiz tm and literally have no clue what i’m doing lol

1)Reaction of strong base and acidic salt

2)Reaction of acid and base

Explanation:

1)  Ammonium carbonate is basically a acidic salt in nature. When it comes in contact of strong base it behave as strong acid and dissociate. Ammonium ion give i's H+ to NaOH and release ammonia gas and water. H2O react with left carbonate ion to form sodium carbonate.

2)  Phosphoric acid is tri basic acid and calcium hydroxide is a base and reacts to form salt and water as side product.

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance