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JEE Main 2025 Chemistry question

ChemistrySolutionsJEE Main 2025

When 1 g each of compounds AB and are dissolved in 15 g of water separately, they increased the boiling point of water by 2.7 K and 1.5 K respectively. The atomic mass of A (in amu) is × 10⁻¹ (Nearest integer) (Given: Molal boiling point elevation constant is 0.5 K kg mol⁻¹)

Answer: 25

Solution

Molality for both = 5.4 m; computing molar masses of AB (12.35) and AB₂

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Question ID VK-002488