Which of the following is a chemical change

a.) water vapor in the air turns to liquid water in the form of rain.
b.) the oxygen in the air forms ozone in presence of uv rays.
c.) dust spit particles being suspended in the air.
d.) sulphuric dioxide being released in the air.

B. the oxygen in the air forms ozone in presence of UV Ray's.

Explanation:

A. is a physical change.

B. is a chemical change.

C. and D. are neither physical nor chemical.

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