8. what type of reaction is this:

9. what type of reaction is this:

10. what type of reaction is this:

11. what type of reaction is this:

12. what type of reaction is this:

The reaction mentioned in the question is a decomposition reaction.

Explanation:

Decomposition reaction is a specific type of chemical reaction in which the reactant molecule undergo break down to generate its respective products.

 NaCl ⇒ Na + Cl2

In the above reaction sodium chloride(NaCl) undergo decomposition or break down to generate Sodium(Na) and chlorine gas(Cl2).

It is Synthesis and combustion

got it correct on EDGE 2020

catya that's not even a b or c

colorless gas, exhibiting a blue glow when placed in an electric field

b) solid

its a type of rock