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Chemistry · 2026

JEE Main · 28 January 2026, Shift 2 · Q51

For the given reaction; CaCO_3+2 HCl → CaCl_2+ H_2 O + CO_2 If 90 g CaCO_3 is added to 300 mL of HCl which contains 38.55 % HCl by mass and has…

For the given reaction; $\displaystyle \mathrm{CaCO}_3+2 \mathrm{HCl} \longrightarrow \mathrm{CaCl}_2+\mathrm{H}_2 \mathrm{O}+\mathrm{CO}_2$ If $\displaystyle 90 \mathrm{~g} \mathrm{CaCO}_3$ is added to $\displaystyle 300$ mL of HCl which contains $\displaystyle 38.55 \% \mathrm{HCl}$ by mass and has density $\displaystyle 1.13 \mathrm{~g} \mathrm{~mL}^{-1}$, then which of the following option is correct ? Given molar mass of H, Cl, Ca and O are $\displaystyle 1$, $\displaystyle 35.5$, $\displaystyle 40$ and $\displaystyle 16 \mathrm{~g} \mathrm{~mol}^{-1}$ respectively.
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JEE Main 2026 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.