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Check the below NCERT MCQ Questions for Class 11 Chemistry Chapter 8 Redox Reactions with Answers Pdf free download. – Refrigerant R134a is a hydro fluorocarbon (HFC) that has zero potential to cause the depletion of the ozone layer and very little greenhouse effect. MCQ Questions for Class 11 Chemistry with Answers were prepared based on the latest exam pattern. 2. Ans: b 2. Erosion of fertile soil. Primary Sidebar. Pick up the wrong statement. Ozone Depletion Multiple Choice Questions and Answers for competitive exams. It readily evaporates and condenses or changes alternatively between the vapor and liquid phase without leaving the refrigerating plant. A refrigerant should have (a) Tow specific heat of liquid (b) high boiling point (c) high latent heat of vaporisation (d) higher critical temperature (e) low specific volume of vapour. – It has a somewhat high affinity for moisture. 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