When an atom in a reactant gains electrons, what happens to its oxidation number?

A. Its oxidation number decreases.

B. Its oxidation number doubles.

C. Its oxidation number increases.

D. Its oxidation number increases by one.

E. Its oxidation number stays the same.

When an atom in a reactant loses electrons, what happens to its oxidation number?

C. Its oxidation number increases.

Hope this answers your question!

chemical properties of thing

answer: the exterior temperature of commercial jet planes as they leave the stratosphere and return to the ground increases steadily.

explanation:

the lower most layer of atmosphere is troposphere which extends from 0 to 12 km above the surface of the earth. the temperature initially decreases as distance is increased from the earth's surface. commercial jets fly in lower part of the stratosphere. the stratosphere extends upto 50 km. the temperature in stratosphere starts rising again due to presence of ozone which traps the uv rays.

thus, when the planes leave the stratosphere and return to the ground, the exterior temperature increases steadily.