Multiple choice

Match the entries in column – I (H-X bond) with that in column – II (bond energy) and select the correct option.

Column – I
Column – II
A. H–F 1. 295 kJ/mol
B. H–Cl 2. 363 kJ/mol
C. H–Br 3. 432 kJ/mol
D. H–I 4. 574 kJ/mol

  1. A - 1, B - 2, C - 3, D - 4

  2. A - 2, B - 3, C - 4, D - 1

  3. A - 2, B - 4, C - 1, D - 3

  4. A - 3, B - 4, C - 1, D - 2

  5. A - 4, B - 3, C - 2, D - 1
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

The stability of hydrogen halides decreases down the group due to decrease in bond (H–X) dissociation enthalpy in the order: H–F > H–Cl > H–Br > H–I. Bond energy of H–F bond is 574 kJ/mol. Bond energy of H–Cl bond is 432 kJ/mol. Bond energy of H–Br bond is 363 kJ/mol. Bond energy of H–I bond is 295 kJ/mol.

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