JEE Mains · Chemistry · STD 11 - 1. Some basic concept of chemistry
A sample of \(\mathrm{CaCO}_3\) and \(\mathrm{MgCO}_3\) weighed \(2.21 \mathrm{~g}\) is ignited to constant weight of \(1.152 \mathrm{~g}\). The composition of mixture is _______. (Given molar mass in \(\mathrm{g} \mathrm{mol}^{-1}{CaCO}_3: 100, \mathrm{MgCO}_3: 84)\)
- A \(1.187 \mathrm{~g} \mathrm{CaCO}_3+1.023 \mathrm{~g} \mathrm{MgCO}_3\)
- B \(1.023 \mathrm{~g} \mathrm{CaCO}_3+1.023 \mathrm{~g} \mathrm{MgCO}_3\)
- C \(1.187 \mathrm{~g} \mathrm{CaCO}_3+1.187 \mathrm{~g} \mathrm{MgCO}_3\)
- D \(1.023 \mathrm{~g} \mathrm{CaCO}_3+1.187 \mathrm{~g} \mathrm{MgCO}_3\)
Answer & Solution
Correct Answer
(A) \(1.187 \mathrm{~g} \mathrm{CaCO}_3+1.023 \mathrm{~g} \mathrm{MgCO}_3\)
Step-by-step Solution
Detailed explanation
\(\mathrm{CaCO}_3(\mathrm{~s}) \xrightarrow{\Delta} \mathrm{CaO}(\mathrm{s})+\mathrm{CO}_2(\mathrm{~g})\) \(\mathrm{MgCO}_3(\mathrm{~s}) \xrightarrow{\Delta} \mathrm{MgO}(\mathrm{s})+\mathrm{CO}_2(\mathrm{~g})\) Let the weight of \(\mathrm{CaCO}_3\) be \(\mathrm{x} \mathrm{gm}\)…
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