Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Main202228 Jul 2022Evening ShiftChemistryHydrogenActual

The products obtained during treatment of hard water using Clark's method are

Options

  1. ACaCO 3 and MgCO 3
  2. BCa OH 2 and Mg OH 2
  3. CCaCO 3 and Mg OH 2
  4. DCa OH 2 and MgCO 3

Correct answer

C. CaCO 3 and Mg OH 2

Step-by-step solution

In this method calculated amount of lime is added to hard water. It precipitates out calcium carbonate and magnesium hydroxide which can be filtered off In Clark's method lime water is used. It is because of low solubility product of Mg(OH) 2 as compared to that of MgCO 3. Ca HCO 3 2 + 2 Ca OH 2 → 2 CaCO 3 + 2 H 2 O Mg HCO 3 2 + 2 Ca OH 2 → 2 CaCO 3 + Mg OH 2 + 2 H 2 O

Practice Hydrogen on Quantrex Academy →

More from Hydrogen

The mass of iron converted into Fe₃O₄ by the action of 18 g of steam is : (Given : Molar mass of H, O and Fe are 1 , 16 and 56 g mol ⁻¹ respectively) Assume iron is present in exce 2026During water-gas shift reaction 2023Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : Isotopes of hydrogen have almost same chemical properties, but d 2023Given below are two statements: Statement I: Permutit process is more efficient compared to the synthetic resin method for the softening of water. Statement II: Synthetic resin met 2023Match List I with List II List I Type of Hydride List II Example A Electron deficient hydride I MgH 2 B Electron rich hydride II HF C Electron precise hydride III B 2 H 6 D Saline 2023Which hydride among the following is less stable? 2023Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R . Assertion A : Physical properties of isotopes of hydrogen are different. Reas 2023Given below are two reactions, involved in the commercial production of dihydrogen H 2 . The two reactions are carried out at temperature “ T 1 ” and “ T 2 &rdquo 2023 Full Hydrogen list All JEE Main PYQs