2, 5-dimethyl-6-carboxy-hex-3-enal

6-formyl-2-methyl-hex-3-enoic acid

2, 5-dimethyl-5-carboxy-hex-3-enal

2, 5-dimethyl-6-oxo-hex-3-enoic acid

In the stratosphere, CFCs release chlorine free radicals (Cl) which reacts with O₃ to give chlorine dioxide radicals

It is a toxic gas and its reaction with NO gives NO₂.

In the atmosphere, it is depleted by CFCs

In the stratosphere, it forms a protective shield against UV radiation

Pipette and distilled water

Clamp and phenolphthalein

Burette and porcelain tile

Bunsen burner and measuring cylinder