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JEE Main Chemistry question

ChemistryRedox ReactionsJEE Main

A 5.6 g sample of limestone is dissolved in acid and the calcium is precipitated as calcium oxalate. The precipitate is filtered, washed with water and dissolved in dil. . The solution required 40 mL of 0.25 N solution for titration. The % of CaO in the limestone is .

Answer: 5

Solution

Meq of Meq of . Mass of CaO (eq. wt.

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Question ID VK-137122