14 0 g of calcium metal is allowed to react with excess... | null (Chemistry)

JEE Mains 2026 21st January Shift 1

Chemistry

14.0 g of calcium metal is allowed to react with excess HCl at 1.0 atm pressure and 273 K .

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Which of the following statements is incorrect?

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[Given : Molar mass in

\mathrm{g} \mathrm{mol}^{-1}

\mathrm{Ca}-40, \mathrm{Cl}-35.5, \mathrm{H}-1

]

0.35\,\mathrm{~mol}\,\mathrm{O}_{2}\,\text{ gas is evolved.}

7.84\,\mathrm{~L}^{\circ}\,\text{ of }\mathrm{H}_{2}\,\text{ gas is evolved.}

33.3\,\mathrm{g}\,\text{ of }\mathrm{CaCl}_{2}\,\text{ is produced.}

The limiting reagent is calcium metal.

\underset{\frac{14}{40}}{\mathrm{Ca}_{(\mathrm{s})}}+\underset{\text { excess }}{2 \mathrm{HCl}_{(\mathrm{g})}} \longrightarrow \underset{-}{\mathrm{CaCl}_{2(\mathrm{~s})}}+\underset{-}{\mathrm{H}_{2(\mathrm{~g})}}\\

=0.35

mole

\quad 0.35

mole 0.35 mole

\\

Volume of

\mathrm{H}_{2(\mathrm{~g})}

evolved

\\=0.35 \times 22.4=7.84 \mathrm{~L}\\

(3) is wrong because weight of

\mathrm{CaCl}_{2}=.35 \times 111=

38.85 gm

Select an option to instantly check whether it is correct or wrong.

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