Zero conditional Vs. First Conditional

What conditional does this sentence belong to?
•If it rains, I will stay at home.

• Zero Conditional

• First Conditional

• If you mix yellow and blue, you get green.

• Zero Conditional

• First Conditional

• If you leave the object, it drops.

• Zero Conditional

• First Conditional

• If I wake up late, I will miss the bus.

• Zero Conditional

• First Conditional

•  If you smoke, you get old early.

• Zero Conditional

• First Conditional