Answer:
The second answer choice
Explanation:
X seems to list attributes for opaque objects, and y lists attributes of Transparent objects.
Answer:
B
Explanation:
Noble gases are in group 18 (neon, argon, etc)
Lead is a pure substance
paint is a mixture substance
Answer: salt
Explanation:
Arrhenius acids are substances which dissociate in water to give
ions.

Arrhenius bases are substances which dissociate in water to give
ions.

Thus when they combine, they neutralize each other and produce salt and water.
