True or false on redox reactions

Exercise and reference answers

Questions

1. Statement is true

   Yes

   Statement

   Oxidation first meant adding oxygen.

2. Statement is true

   No

   Statement

   Dioxygen is about 80 per cent of air.

3. Statement is true

   Yes

   Statement

   Redox involves electron transfer.

4. Statement is true

   No

   Statement

   Oxidation numbers are guessed at random.

5. Statement is true

   Yes

   Statement

   Disproportionation is a kind of redox.

6. Statement is true

   No

   Statement

   It needs an element with one oxidation state.

Instructions

Decide whether each statement is true or false.

Explanation