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MHT CET202523 Apr 2025Evening ShiftChemistryp Block Elements (Group 15, 16, 17 & 18)Actual

Which of the following interhalogen compounds in liquid state at room temperature?

Options

  1. AICl
  2. BClF ₃
  3. CBrF ₅
  4. DIF ₇

Correct answer

C. BrF ₅

Step-by-step solution

Liquid interhalogen compounds at room temperature (20–25°C) are identified by comparing their phase transition temperatures: ICl exists as a red-brown liquid, with the beta form melting at 13.9° C and boiling at 97° C . BrF ₅ melts at -60° C and boils at 40.3° C , remaining liquid within the room temperature range. ClF ₃ boils at 11.75° C and IF ₇ sublimes at 4.77° C , both being gaseous under these conditions. Thus, only ICl and BrF ₅ are liquids at room temperature. A, C

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