JEE Main 2023 · 13 April · evening · Single correct · +4 / −1

Identify the correct order of standard enthalpy of formation of sodium halides :

  1. (a) NaI<NaBr<NaCl<NaF
  2. (b) NaI<NaBr<NaF<NaCl
  3. (c) NaF<NaCl<NaBr<NaI
  4. (d) NaCl<NaF<NaBr<NaI
Answer and solution

Answer (a) NaI<NaBr<NaCl<NaF

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Asked about 160 times in JEE Main since 2020. This question is from 2023.