Question

A substance that has high reactivity

A. easily combines chemically with other substances.
B. burns in the presence of water.
C. displaces dissolved oxygen.
D. has a high boiling point.

Answer 1

A. easily combines chemically with other substances.

Step-by-step explanation:

The reactivity is the property of a substance or element to react. They react to be stable which occurs with a low energy state, or for the element when it has 8 electrons in its valence shell. So, a reactivity substance can easily react, or combine chemically with other substances.

To burn in the presence of water, the substance has to be a high combustion enthalpy in the presence of water; to displace the dissolved oxygen, it can't dissolve it well; and to have a high boiling point it must have strong bonds and high molecular weight.

Answer 2

The correct answer is A. A substance that has high relativity easily combines chemically with other substances. A substance with high reactivity changes very quickly and and reacts violently when mixed with other substances.