Question

What type of reaction is 3 and 4 ?

Answer 1

3 is decomposition

4 is double replacement

Step-by-step explanation:

In decomposition reactions, a compound (two or more elements) are broken down into singular elements.

Double replacement reactions have two different compounds, one element from a compound switches with another element in the other compound.

Answer 2

Step-by-step explanation:

3.)

2NaN3(s) → 2Na(s) + 3N2(g)

= Decomposition Reaction

4.)

Ba(NO3)2 + K2SO4 → 2KNO3 + BaSO4

= Double Displacement Reaction