Chemistry question about properties of acids.

Question

What properties do acids have in common? Select all that apply.

1. They are caused by acid rain.
2. They make some pigments change color.
3. They are all solid substances.
4. They react with metals to form hydrogen gas.
5. They have a bitter taste.

I think only this 3 are properties of acids, but i am not sure.

Answer 1

They make some pigments change color.

They react with metals to form hydrogen gas. Actually, they only react with SOME metals to form H2 gas

Acids taste sour, not bitter. Bases taste bitter, so this would not be a good choice