D. is the right answer.
When you mix two things, color doesn't necessarily change.
Substances are not always formed.
Gas may not always be a product of your reaction.
Answer:
When isolated as a free element, chlorine takes the form of a greenish-yellow gas, which is 2.5 times heavier than air and smells like bleach. Chorine is the second-most-abundant halogen and the second-lightest halogen on Earth, after fluorine
Explanation:
The fine adjustment knob focuses an image. The coarse adjustment knod moves the slide up or down.
I would say your answer is C, or the last one. Hope it helps
