JEE Main 2026 · Session 2 · Shift 1 · Chemistry

Question 54

Consider the following data. (i) 2Al(s) + 6HCl(aq) → Al₂Cl₆(aq) + 3H₂(g) + 1200 kJ/mol (ii) H₂(g) + Cl₂(g) → 2HCl(g) + 164 kJ/mol. (iii) HCl(g) + aq → HCl(aq) + 83 kJ/mol. (iv) Al₂Cl₆(s) + aq → Al₂Cl₆(aq) + 663 kJ/mol The enthalpy of formation of anhydrous solid Al₂Cl₆ is:

• A. −648 kJ mol⁻¹
• B. −1350 kJ mol⁻¹
• C. −2002 kJ mol⁻¹
• D. −1527 kJ mol⁻¹Correct answer

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