WBCS.LIVE practice question

Which among the following is present in refrigerator?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. Carbon dioxide
  2. Methane
  3. Helium
  4. Chlorofluorocarbon

Correct answer and explanation

Correct answer: Chlorofluorocarbon

Explanation: Modern refrigerators use Chlorofluorocarbons (CFCs) as the main refrigerant gas. 📚 Other Information: ▪️ CFCs were widely used for cooling and as propellants in aerosol sprays. ▪️ They are non-toxic and non-flammable, making them suitable for home use. ▪️ However, they cause ozone layer depletion. ▪️ Due to environmental concerns, CFCs are being replaced by HFCs and HCFCs. ▪️ The Montreal Protocol (1987) aimed to phase out CFCs globally. ▪️ In India, alternative refrigerants like R-134a are now common. ▪️ The refrigeration cycle works by compressing and evaporating these gases. ▪️ They help in heat exchange, keeping the internal space cool.