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Chemistry - Halogen Derivative Question with Solution | TestHub

ChemistryHalogen DerivativeNUCLEOPHILIC SUBSTITUTION REACTIONS (SN1 AND SN2), SN(NEIGHBOURING GROUP PARTICIPATION), SNIHard2 minPYQ_2024

ChemistryHardsingle choice

Which from following compounds is used to prepare a refrigerant R-22?

Options:

Answer:

Solution:

Refrigerant R-22 is chlorodifluoromethane ( $C H Cl F_{2}$ ).

It is prepared by the action of hydrogen fluoride on trichloromethane (chloroform) in the presence of antimony pentachloride as a catalyst (Swarts reaction).

$C H C l_{3} + 2 H F S b C l_{5} C H Cl F_{2} + 2 H Cl$

Thus, trichloromethane is used to prepare refrigerant R-22.

Answer: Trichloromethane

Stream:MHT_CETSubject:ChemistryTopic:Halogen DerivativeSubtopic:NUCLEOPHILIC SUBSTITUTION REACTIONS (SN1 AND SN2), SN(NEIGHBOURING GROUP PARTICIPATION), SNI

⏱ 2mℹ️ Source: PYQ_2024

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