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NEET Chemistry Molarity MCQ Question

Type: MCQ-numerical-Medium-Class 12

The molar concentration of Cl⁻ ions in a solution obtained by mixing 300 mL of 0.3 M NaCl and 200 mL of 0.4 M BaCl₂ is

A

0.9 M

B

5 M

C

0.25 M

D

0.5 M

Correct Answer

Option A

Detailed Explanation

The total moles of Cl⁻ from NaCl = 0.3 × 0.3 = 0.09 moles, and from BaCl₂ = 0.4 × 0.2 × 2 = 0.16 moles. Total volume = 0.5 L. Molarity = (0.09 + 0.16) / 0.5 = 0.5 M.

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