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A + 2 B → AB₂. 36.0 g of 'A' (Molar mass : 60 g mol⁻¹) and 56.0 g of 'B' (Molar mass : 80 g mol⁻¹) are allowed to react. Which of the following statements are correct? (A) 'A' is the limiting reagent (B) 77.0 g of AB₂ is formed (C) Molar mass of AB₂ is 140 g mol⁻¹ (D) 15.0 g of A is left unreacted after completion of reaction Choose the correct answer from the options given below: (1) C and D only (2) A and C only (3) B and D only (4) A and B only

1. C and D only
2. A and C only
3. B and D only
4. A and B only

Correct answer: B and D only

Solution

Option B is correct because the calculations show that 'A' is indeed the limiting reagent, and 77.0 g of AB₂ is produced based on the stoichiometry of the reaction. Option D is also correct as it indicates the amount of 'A' left unreacted after the reaction, confirming that 'A' is the limiting reagent.

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