The depletion of ozone layer is linked to synthetic chemicals such as chlorofluorocarbons (CFCs) which are used as refrigerants, aerosol sprays and in fire extinguishers.

When oxygen reacts with UV rays it breaks down as free oxygen (O) atoms. Again free atoms combine with oxygen and creates O₃. O₂ + UV → O + O O + O₂ → O₃

Class 10 Science Terminal Exams MCQ Solutions Class X Science MCQ Extra Questions Answers Class 10th Science Session 2022-23 10th Science Terminal Exam Based MCQ Extra Questions

Class 10 Science Terminal Exams MCQ Solutions Class X Science MCQ Extra Questions Answers 10th Science Terminal Exam Based MCQ Extra Questions Class 10th Science Session 2022-23

At night, when there is no sunlight, transpiration is very low but the absorption of substances by roots is high.