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WBCS Main Examination 2023 — Paper IV: General Studies II · Question 174 of 200

Q174
General ScienceChemistry
These days HFC is replaced by which gas in refrigerator?
  1. a.Toluene
  2. b.Butane
  3. c.Isobutane
  4. d.Nitrobenzene

Answer: (C) Isobutane

Domestic refrigerators increasingly use isobutane (R-600a), a hydrocarbon refrigerant with no ozone-depletion potential and very low global warming potential, in place of the HFC R-134a. Normal butane is not the standard choice, and toluene and nitrobenzene are liquids unsuited as refrigerants.

Q173 Whole paperQ175