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Discuss biological and industrial importance of osmosis.
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How can you remove the hard calcium carbonate layer of the egg without damaging its semiprermiable membrane? Can this egg be inserted into a bottle with a narrow neck without distorting its shape? Explain the process involved.
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At high concentration of soap in water, soap behaves as ______.
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Which of the following options are correct?
(i) Micelle formation by soap in aqueous solution is possible at all temperatures.
(ii) Micelle formation by soap in aqueous solution occurs above a particular concentration.
(iii) On dilution of soap solution micelles may revert to individual ions.
(iv) Soap solution behaves as a normal strong electrolyte at all concentrations.
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Method of formation of solution is given in Column I. Match it with the type of solution given in Column II.
| Column I | Column II |
| (i) Sulphur vapours passed through cold water | (a) Normal electrolyte solution |
| (ii) Soap mixed with water above critical micelle concentration | (b) Molecular colloids |
| (iii) White of egg whipped with water | (c) Associated colloid |
| (iv) Soap mixed with water below critical micelle concentration | (d) Macro molecular colloids |
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A chelating agent has two or more than two donor atoms to bind to a single metal ion. Which of the following is not a chelating agent?
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Which of the following species is not expected to be a ligand?
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Assertion: Toxic metal ions are removed by the chelating ligands.
Reason: Chelate complexes tend to be more stable.
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Molecules whose mirror image is non-superimposable over them are known as chiral. Which of the following molecules is chiral in nature?
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Which of the following statements are correct about the mechanism of this reaction?
(i) A carbocation will be formed as an intermediate in the reaction.
(ii) \[\ce{OH-}\] will attach the substrate (b) from one side and \[\ce{Cl-}\] will leave it simultaneously from other side.
(iii) An unstable intermediate will be formed in which \[\ce{OH-}\] and \[\ce{Cl-}\] will be attached by weak bonds.
(iv) Reaction proceeds through SN1 mechanism.
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The correct order of increasing acidic strength is ______.
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Why is \[\ce{NH2}\] group of aniline acetylated before carrying out nitration?
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Coagulation of egg white on boiling is an example of denaturation of protein. Explain it in terms of structural changes.
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Complete the following:
\[\ce{C6H5NO2 ->[Sn/HCl] A ->[Br2/H2O] B ->[NaNO2/HCl][273 - 278 K] C ->[HBF4][Δ] D}\]
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What would be the major product of the following reaction?
\[\ce{C6H5 - CH2 - OC6H5 + HBr -> A + B}\]
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Differentiate between the following:
Multimolecular Colloid and Macromolecular colloid
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Assertion (A) : Osmotic pressure is a colligative property.
Reason (R) : Osmotic pressure is proportional to the molality.
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Determine the osmotic pressure of a solution prepared by dissolving 2.32 × 10−2 g of K2SO4 in 2L of solution at 25°C assuming that K2SO4 is completely dissociated.
(R = 0.082 L atm K−1 mol, Molar mass K2SO4 = 174 g mol−1)
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What structural change will occur when a native protein is subjected to change in pH?
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What is meant by the chelate effect? Give an example.
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