MCQ ON SOLUTIOS & SOLID STATE

The aqueous solution of contains (a) 49 gm of per litre of solution (b) 4.9 gm of per litre of solution (c) 98 gm of per litre of solution (d) 9.8 gm of per litre of solution The amount of required to prepare 100 ml of solution in alkaline medium is [CPMT 1986] (a) 1.58 gm (b) 3.16 gm (c) 0.52 gm (d) 0.31 gm What weight of hydrated oxalic acid should be added for complete neutralisation of of solution ? [MP PMT 1997] (a) (b) (c) (d) A tooth paste sample has fluoride concentration. What is the concentration of in terms of ppm level [AIIMS 1992] (a) 250 (b) 200 (c) 400 (d) 1000 To of one of water is added to prepare of solution. What is the strength of in this solution (mol. wt. of ) [CPMT 1990; DPMT 1987] (a) 0.1 Normal (b) 0.1 Molal (c) 0.1 Molar (d) 0.1 Formal The degree of dissociation of in a dilute aqueous solution containing 14g of the salt per 200g of water is 70 percent. If the vapour pressure of water at is 760 cm. Calculate the vapour pressure of the solution [UPSEAT 2000] (a) 746.3 mm of Hg (b) 757.5 mm of Hg (c) 740.9 mm of Hg (d) 750 mm of Hg The vapour pressure of pure benzene at a certain temperature is 200 mm Hg. At the same temperature the vapour pressure of a solution containing 2g of non-volatile non-electrolyte solid in 78g of benzene is 195 mm Hg. What is the molecular weight of solid [UPSEAT 2001] (a) 50 (b) 70 (c) 85 (d) 80 Which one of the following non-ideal solutions shows the negative deviation (a) (b) (c) (d) The O.P. of equimolar solution of Urea, and , will be in the order [DCE 2000] (a) (b) (c) (d) The osmotic pressure of a 5% solution of cane sugar at is (mol. wt. of cane sugar = 342) [CPMT 1986; Manipal MEE 1995] (a) 4 atm (b) 3.4 atm (c) 5.07 atm (d) 2.45 atm Which one of the following pairs of solutions can we expect to be isotonic at the same temperature [NCERT 1982] (a) urea and (b) urea and (c) and (d) and Which of the following would have the highest osmotic pressure (assume that all salts are 90% dissociated) [NCERT 1982] (a) Decimolar aluminium sulphate (b) Decimolar barium chloride (c) Decimolar sodium sulphate (d) A solution obtained by mixing equal of (b) and (c) and filtering Which solution will have the highest boiling point [NCERT 1981] (a) 1% solution of glucose in water (b) 1% solution of sodium chloride in water (c) 1% solution of zinc sulphate in water (d) 1% solution of urea in water The boiling point of a solution of 0.11 gm of a substance in 15 gm of ether was found to be higher than that of the pure ether. The molecular weight of the substance will be [MP PET 2002] (a) 148 (b) 158 (c) 168 (d) 178 The boiling point of benzene is 353.23 K. When 1.80 gm of a nonvolatile solute was dissolved in 90 gm of benzene, the boiling point is raised to 354.11 K. the molar mass of the solute is for benzene = 2.53 K mol–1] [DPMT 2004] (a) (b) (c) (d) The boiling point of 0.1 molal aqueous solution of urea is at 1 atm. The molal elevation constant of water is (a) 1.8 (b) 0.18 (c) 18 (d) 18.6 The freezing point of a solution containing 4.8 g of a compound in 60 g of benzene is 4.48. What is the molar mass of the compound, (freezing point of benzene = 5.5o [AFMC 2000] (a) 100 (b) 200 (c) 300 (d) 400 When 0.01 mole of sugar is dissolved in of a solvent, the depression in freezing point is . When 0.03 mole of glucose is dissolved in of the same solvent, the depression in freezing point will be (a) (b) (c) (d) The freezing point of equimolal aqueous solution will be highest for [IIT 1990; DCE 2001] (a) (aniline hydrochloride) (b) (c) (d) (glucose) The Van't Hoff factor of the compound is (a) 1 (b) 2 (c) 3 (d) 4 Particles of quartz are packed by (a) Electrical attraction forces (b) Vander Waal's forces (c) Covalent bond forces (d) Strong electrostatic attraction forces Crystals of covalent compounds always have [BHU 1984] (a) Atoms as their structural units (b) Molecules as structural units (c) Ions held together by electrostatic forces (d) High melting points Wax is an example of (a) Ionic crystal (b) Covalent crystal (c) Metallic crystal (d) Molecular crystal Among the following which crystal will be soft and have low melting point (a) Covalent (b) Ionic (c) Metallic (d) Molecular In zinc blende structure, zinc atom fill up (a) All octahedral holes (b) All tetrahedral holes (c) Half number of octahedral holes (d) Half number of tetrahedral holes Which ion has the lowest radius from the following ions [Kurukshetra CEE 1998] (a) (b) (c) (d) The second order Bragg's diffraction of rays with from a set of parallel planes in a metal occurs at an angle of The distance between the scattering planes in the crystal is [CBSE PMT 1998; AFMC 2001] (a) (b) (c) (d) The edge length of the unit cell of crystal lattice is If ionic radius of sodium ion is what is the ionic radius of chloride ion [KCET 1998] (a) (b) (c) (d) The ionic radii of and are 1.46 Å and 2.16Å. the most probable type of structure exhibited by it is [UPSEAT 2004] (a) type (b) type (c) type (d) type The coordination number of a cation occupying a tetrahedral hole is (a) 6 (b) 8 (c) 12 (d) 4 If a electron is present in place of anion in a crystal lattice, then it is called (a) Frenkel defect (b) Schottky defect (c) Interstitial defects (d) centre  1. (c) Wt. of per litre = 98g. 2. (a) In alkaline medium act as oxidant as follows. Hence its = Now, Normality mass 3. (d) For complete neutralization equivalent of oxalic acid = equivalent of NaOH = ( . 4. (c) ions in = 5. (b) 5.85 g NaCl = 0.1 mol as it present in 1 kg of water ; molality =0.1molal 6. (a) 7. (d) 8. (d) is non ideal solution which shown negative deviation. 9. (a) The particle come of solution will be maximum due to ionisation less in and minimum in urea More the number of particles in solution more is the osmotic pressure a colligative properties. 10. (c) . 11. (d) Osmotic pressure is a coligative properties equimolar solution of and will produce same number of solute particles. ⇌ ⇌ 12. (a) Deci-molar gives maximum ion. Hence, its osmotic pressure is maximum. 13. (b) and gives 2 ions but is more ionic than . 14. (b) . 15. (c) The elevation in the boiling point Substituting these values in expression Where, weight of solute, weight of solvent Hence, molar mass of the solute 16. (a) 17. (d) . 18. (d) again 19. (d) will furnish four ions and thus will develop more lowering in freezing point whereas glucose gives only one particle and thus minimum lowering in freezing point. 20. (d) 21. (c) Quartz is a covalent solid in which constituent particles are atoms which are held together by covalent bond forces. 22. (a) Constituent particles of covalent compounds are atoms. 23. (d) Iodine crystals are molecular crystals, in which constituent particles are molecules having interparticle forces are Vander Waal’s forces. 24. (d) Molecular crystals are soft and have low melting point. 25. (d) In zinc blende half number of tetrahedral holes are filled by zinc atoms. 26. (d) All are the iso-electronic species but has high positive charge so have lowest radius. 27. (d) 2d or or or or . 28. (c) Distance between centres of and or or 29. (c) It permits co-ordination number 6 and octahedral structure of type . 30. (d) The co-ordination number of a cation occupying a tetrahedral hole is 4. 31. (d) When electrons are trapped in anion vacancies, these are called F-centres. SOLUTIOS & SOLID STATE Mrs. Shallu Jindal Aggarwal M:98786-08983 GENERAL ORGANIC CHEMISTRY 3 *** Mrs Shallu Aggarwal Mobile #. 98786-08983 ***