AIIMS 2017 Chemistry Percentage Composition MCQ Question
A sample of a mixture of and weighing was treated to precipitate all the as . This is heated and quantitatively converted into of .
Calculate the percentage of in the mixture.(Atomic mass of , , and )
Correct Answer
Detailed Explanation
The calculation shows that 1.71 g of CaCO₃ corresponds to 189 g of CaCl₂, indicating that the mass ratio of CaCl₂ to CaCO₃ is approximately 111 g of CaCl₂ for every 100 g of CaCO₃. This results in a percentage of CaCl₂ in the mixture that is around 45%, aligning with option A. Other options are not applicable as they do not provide relevant mass ratios or percentages based on the stoichiometric relationships established in the reactions. Understanding these relationships is crucial for calculating yields and compositions in chemical reactions.
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