Which of the following is true about acids?
a. most acids are sour.
b. most acids corrode metals.
c. every acid contains hydrogen.
d. acids have a ph of greater than

The answer is C which is why we measure things on a pH scale.

Some examples of acids are HCl and H2SO4. (These are the only ones I can remember atm) but as you can see they both contain Hydrogen.

Non metal is an element or substance that is not a metal metal is a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivitymetalloid is an element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals. they are electrical semiconductors.