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Which of the following statements is false?
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Isotonic solutions must have the same:
(i) solute
(ii) density
(iii) elevation in boiling point
(iv) depression in freezing point
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In isotonic solutions:
(i) Solute and solvent both are same.
(ii) Osmotic pressure is same.
(iii) Solute and solvent may or may not be same.
(iv) Solute is always same solvent may be different.
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Give an example of a material used for making semipermeable membrane for carrying out reverse osmosis.
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Match the items given in Column I and Column II.
| Column I | Column II |
| (i) Saturated solution | (a) Solution having same osmotic pressure at a given temperature as that of given solution. |
| (ii) Binary solution | (b) A solution whose osmotic pressure is less than that of another. |
| (iii) Isotonic solution | (c) Solution with two components. |
| (iv) Hypotonic solution | (d) A solution which contains maximum amount of solute that can be dissolved in a given amount of solvent at a given temperature. |
| (v) Solid solution | (e) A solution whose osmotic pressure is more than that of another. |
| (vi) Hypertonic solution | (f) A solution in solid phase. |
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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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Which of the following oxidation state is common for all lanthanoids?
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There are 14 elements in actinoid series. Which of the following elements does not belong to this series?
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Which of the following actinoids show oxidation states upto +7?
(i) Am
(ii) Pu
(iii) U
(iv) Np
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Assertion: Actinoids form relatively less stable complexes as compared to lanthanoids.
Reason: Actinoids can utilise their 5f orbitals along with 6d orbitals in bonding but lanthanoids do not use their 4f orbital for bonding.
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Complete the following reaction sequence.
\[\begin{array}{cc}
\ce{O}\phantom{...............................................}\\
||\phantom{...............................................}\\
\ce{CH3 - C - CH3 ->[(i) CH3MgBr][H2O] (A) ->[Na metal][Ether] (B) ->[CH3 - Br] (C)}
\end{array}\]
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Assertion: Formaldehyde is a planar molecule.
Reason: It contains sp2 hybridised carbon atom.
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The reaction \[\ce{Ar\overset{+}{N2}Cl- ->[Cu/HCl] ArCl + N2 + CuCl}\] is anmed as ______.
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Which of the following cannot be prepared by Sandmeyer’s reaction?
(i) Chlorobenzene
(ii) Bromobenzene
(iii) Iodobenzene
(iv) Fluorobenzene
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Arrange the following compounds in increasing order of dipole moment.
\[\ce{CH3CH2CH3, CH3CH2NH2, CH3CH2OH}\]
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Discuss briefly, giving an example in the given case and the role of coordination compounds in biological systems.
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