True or false about redox reactions

Exercise and reference answers

Questions

1. Statement is true

   Yes

   Statement

   Oxidation and reduction happen together.

2. Statement is true

   Yes

   Statement

   A free element has oxidation number zero.

3. Statement is true

   No

   Statement

   Oxygen is minus two in every compound.

4. Statement is true

   No

   Statement

   All decomposition reactions are redox.

5. Statement is true

   Yes

   Statement

   Hydrogen is minus one in a metal hydride.

6. Statement is true

   Yes

   Statement

   Disproportionation needs three states.

Instructions

Decide whether each statement is true or false.

Explanation