2.1.5 - Redox

Question 1

What is the oxidation number of group 1 metals?

Answer 1

+1

Question 2

What is the oxidation number of group 2 metals?

Answer 2

+2

Question 3

What is the oxidation number of uncombined elements?

Answer 3

0

Question 4

What is the oxidation number of combined oxygen?

Answer 4

-2

Question 5

What is the oxidation number of combined hydrogen?

Answer 5

+1

Question 6

What is the oxidation number of a simple ion?

Answer 6

The charge on the ion.

Question 7

What is the oxidation number of combined fluorine?

Answer 7

-1

Question 8

What is the oxidation number of aluminium?

Answer 8

+3

Question 9

What is the oxidation number of oxygen when it is bonded to fluorine?

Answer 9

+2

Question 10

What is the oxidation number of hydrogen when in metal hydrides?

Answer 10

-1

Question 11

What do Roman numerals tell you?

Answer 11

The oxidation number

Question 12

What is oxidation?

Answer 12

The loss of electrons and the increase in oxidation number.

Question 13

What is reduction?

Answer 13

The gain of electron, and a reduction in oxidation number.

Question 14

What are redox reactions?

Answer 14

When oxidation and reduction occur simultaneously in a reaction.

Question 15

What happens to oxidation number when metals react with acids.

Answer 15

The metal atom is oxidised to form a positive metal and the hydrogen ions are reduced to form hydrogen molecules.