The best PDFs categorize actual EAMCET questions from the last 10–15 years by chapter.
Boiling point elevation ∝ van’t Hoff factor (i). Urea (i=1), NaCl (i=2), BaCl₂ (i=3), AlCl₃ (i≈4). Highest i = AlCl₃. Hence, Option (d).
While the market is flooded with study material, students should rely on sources that align strictly with the EAMCET syllabus (Telangana/Andhra Pradesh State Boards).