science help?

Question

1.What occurs in a reduction reaction?

A.There is no change in the oxidation state
B.The oxidation state of an element increases
C.A particle gains electrons
D.A particle looses electron


2.In one species in a redox reaction undergoes oxidation,what happens to the other species?

A.it must undergo oxidation
B.it must undergo reduction
C.it MAYundergo oxidation
D.it MAY undergo reduction

Answer 1

The best answer for both of those questions are in your text book. You should verify what I am going to tell you. Question 1 = B
Question 2 = B

Answer 2

I agree with the first answer you received, however, oxidation and reduction properly refer to a change in oxidation number — the actual transfer of electrons may never occur. Thus, oxidation is better defined as an increase in oxidation number, and reduction as a decrease in oxidation number. In practice, the transfer of electrons will always cause a change in oxidation number, but there are many reactions which are classed as "redox", though no electrons are transferred (such as those involving covalent bonds).
1.C, because it obviously, as defined from above, cannot be either a or b
2.D, as defined above, although I think for your purposes, B would be better.

Answer 3

I'm a medical student.....so hopefully my chemistry knowledge is still intact!

1. C
2. B

Just remember the pneumonic "LEO says GER"

LEO= Lose Electrons Oxidation
GER= Gain electrons Reduction

When u have a reaction with 2 substrates then one has to undergo oxidation and the other reduction. If one loses an electron (oxidation) then the other substrate has to gain that electron (reduction)

Answer 4

1. C
2. B assuming there are only 2 species in the equation of course... perhaps I'm overthinking this. The obvious answer is B