Question 60

14.0 g of calcium metal is allowed to react with excess HCI at 1.0 atm pressure and 273 K
Which of the following statements is incorrect?
[Given : Molar mass in g $$\text{mol}^{-1}$$ of Ca-40, Cl-35.5, H-1]

Ca + 2HCl → CaCl₂ + H₂. Moles Ca = 14/40 = 0.35 mol.

Moles H₂ = 0.35 mol. Volume at STP = 0.35 × 22.4 = 7.84 L ✓.

Mass CaCl₂ = 0.35 × 111 = 38.85 g. Option 4 says 33.3 g — incorrect.

The answer is Option 4: 33.3 g of CaCl₂ is the incorrect statement.

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14.0 g of calcium metal is allowed to react with excess HCI at 1.0 atm pressure and 273 KWhich of the following statements is incorrect? [Given : Molar mass in g $$\text{mol}^{-1}$$ of Ca-40, Cl-35.5, H-1]