Which one of the following is NOT one of the definitions of reduction?

Question

a. Reduction is the reaction of a substance with hydrogen gas.

b. Reduction is the loss of hydrogen from a substance

c. Reduction is the gain of electrons by a substance.

d. Reduction is the gain of hydrogen by a substance.

e. Reduction is the loss of oxygen from a substance.

Answer 1

b.  Reduction is gaining an electron which increases the negative charge, hence the label reduction.

Answer 2

b, since hydrogen generally donates its electron to bond, so when a substance loses hydrogen, it loses an electron and increases its oxidation number and is oxidized, not reduced

Answer 3

It's B

Obviously it has to be either B or D (only mutually exclusive answers). Reduction is the process of gaining electrons, this can often occur in a reaction where a substance gains hydrogen atoms, which carry along with them a single electron.

Answer 4

b

OILRIG

Oxidation is loss ( of hydrogen and electrons), reduction is gain (of H and e-s)

For oxygen, oxidation is gain of oxygen and reduaction is loss of oxygen so OILRIG doesn' apply.