Redox Reactions

Question 1

Oxidation?

Answer 1

Add O/e’ -ve element

Question 2

Reduction reactions

Answer 2

Half reactions that involve gain of e’s

Question 3

Oxidation reactions

Answer 3

Half reactions that involve loss of e’s

Question 4

Reducing agent is

Answer 4

One that is oxidized, donates e’ to each element & helps in reducing them

Question 5

Oxidizing vs reducing agent

Answer 5

Oxidizing agent: accept e’s

Question 6

Oxidation number

Answer 6

It denotes oxidation state of an element based on e’ pair in covalent bond that belongs to more e’ -ve element

Question 7

Rules of oxidation number

Answer 7

1. In elements, it is 0
2. Ions with 1 atom, it is = charge on it
3. In H2O2,Na2O2 ‘O’ has -1
4. In LiH, NaH ‘H’ is -1
5. Sum of oxid. no.s = 0
6. In polyatoms, Sum = total charge

Question 8

Types of redox reactions

Answer 8

Combination
Decomposition
Displacement
Disproportiation

Question 9

Displacement reaction types

Answer 9

Metal: metal gets displaced by another
Non-metal: H displacement

Question 10

______ are very good reactants

Answer 10

Alkali metals & alkaline earth metals

Question 11

Disproportiation?

Answer 11

Same element undergoes 1 oxidation & 1 reduction at same time

Question 12

Oxidation _______ e’ density

Answer 12

Decrease

Question 13

Electrode potential

Answer 13

Tendency of species to remain oxidised/reduced form

Question 14

-ve E° means _____ reducing agent

Answer 14

Stronger