If dichloromethane (DCM) and water (H2O) are used for differential extraction, which one of the following statements is correct?

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JEE Mains Previous Paper 1 (Held On: 10 Jan 2019 Shift 1)
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  1. DCM and H2O would stay as lower and upper layer respectively in the S.F.
  2. DCM and H2O would stay as upper and lower layer respectively in the separating funnel (S.F.)
  3. DCM and H2O will be miscible clearly
  4. DCM and H2O will make turbid/colloidal mixture

Answer (Detailed Solution Below)

Option 1 : DCM and H2O would stay as lower and upper layer respectively in the S.F.
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JEE Main 04 April 2024 Shift 1
90 Qs. 300 Marks 180 Mins

Detailed Solution

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Concept:

Things float when they are positively buoyant or less dense than the fluid in which they are sitting.

Dichloromethane, DCM (CH2Cl2) is heavier (density = 1.3266g cm-3)) than water (density = 1 g cm-3).

So, DCM and H2O will stay as lower and upper layer respectively in the separating funnel (S.F).

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