CHEMISTRY FOR JEE

1. \(6.02 \times 10^{20}\) molecules of urea are present in \(100 \mathrm{~mL}\) of its solution. The concentration of urea solution is

(Avogadro constant,

1) \(0.001 \mathrm{M}\)

3) \(0.02 \mathrm{M}\)

2) \(0.01 \mathrm{M}\)

4) \(0.1 \mathrm{M}\)

[AIEEE 2004]

2. \(2 \mathrm{~N} \mathrm{HCl}\) solution will have same molar concentration as a [WB JEE 2008]

1) \(4.0 \mathrm{~N} \mathrm{H}_{2} \mathrm{SO}_{4}\)

2) \(0.5 \mathrm{NH}_{2} \mathrm{SO}_{4}\)

3) \(1 \mathrm{~N} \mathrm{H}_{2} \mathrm{SO}_{4}\)

4) \(2 \mathrm{~N} \mathrm{H}_{2} \mathrm{SO}_{4}\)

3. Volume of \(0.1 \mathrm{M}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\) required to oxidise \(35 \mathrm{~mL}\) of \(0.5 \mathrm{M} \mathrm{FeSO}_{4}\) solution is [J\&K CET

2004]

1) \(29.2 \mathrm{~mL}\)

2) \(17.5 \mathrm{~mL}\)

3) \(175 \mathrm{~mL}\)

4) \(145 \mathrm{~mL}\)

4. How much \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\) (Mol. wt. \(=294.19\) ) is required to prepare one litre of \(0.1 \mathrm{~N}\) solution?

[OJEE 2003]

1) \(9.8063 \mathrm{~g}\)

2) \(7.3548 \mathrm{~g}\)

3) \(3.6774 \mathrm{~g}\)

4) \(4.903 \mathrm{~g}\)

5. \(\mathrm{x}\) gram of water is mixed in \(69 \mathrm{~g}\) of ethanol. Mole fraction of ethanol in the resultant solution is 0.6. What is the value of \(\mathrm{x}\) in grams?

[EAMCET 2004]

1) 54

2) 36

3) 180

4) 18

6. Normality of \(2 \mathrm{M} \mathrm{H}_{2} \mathrm{SO}_{4}\) is [J\&K CET 2003]

1) \(2 \mathrm{~N}\)

2) \(4 \mathrm{~N}\)

3) \(\frac{N}{2}\)

4) \(\frac{N}{4}\)

7. In which ratio of volume \(0.4 \mathrm{M} \mathrm{HCl}\) and \(0.9 \mathrm{M}\) \(\mathrm{HCl}\) are to be mixed such that the concentration of the resultant solution becomes \(0.7 \mathrm{M}\) ? [MP

\section{PET 2010]}

1) \(4: 9\)

2) \(2: 3\)

3) \(3: 2\)

4) \(1: 1\)

8. What is the molarity of \(0.2 \mathrm{~N} \mathrm{Na}_{2} \mathrm{CO}_{3}\) solution?

[JCECE 2010]

1) \(0.1 \mathrm{M}\)

2) \(0 \mathrm{M}\)

3) \(0.4 \mathrm{M}\)

4) \(0.2 \mathrm{M}\)

9. Density of a \(2.05 \mathrm{M}\) solution of acetic acid in water is \(1.02 \mathrm{~g} / \mathrm{mL}\). The molality of the solution is [UP SEE 2006]

1) \(9 \mathrm{~L}\)

2) \(1.8 \mathrm{~L}\)

3) \(8 \mathrm{~L}\)

4) \(0.9 \mathrm{~L}\)

10. A mixture of ethane and ethene occupies \(41 \mathrm{~L}\) at \(1 \mathrm{~atm}\) and \(500 \mathrm{~K}\). the mixture reacts completely with \(\frac{10}{3}\) mole of \(\mathrm{O}_{2}\) to produce \(\mathrm{CO}_{2}\) and \(\mathrm{H}_{2} \mathrm{O}\). The mole fraction of ethane and ethene in the mixture are \(\left(R=0.082 \mathrm{Latm}^{-1} \mathrm{~mol}^{-1}\right)\) respectively

[Kerala CEE 2011]

1) \(0.50,0.50\)

2) \(0.75,0.25\)

3) \(0.67,0.33\)

4) \(0.25,0.75\)

5) \(0.33,0.67\)

11. Dissolving \(120 \mathrm{~g}\) of urea (mol. Wt. 60) in1000 g of water gave a solution of density \(1.15 \mathrm{~g} / \mathrm{mL}\). The molarity of the solution is [IIT JEE 2011]

1) \(1.78 \mathrm{M}\)

2) \(2.00 \mathrm{M}\)

3) \(2.05 \mathrm{M}\)

4) \(2.22 \mathrm{M}\)

12. A solution is prepared by dissolving \(24.5 \mathrm{~g}\) of sodium hydroxide in distilled water to give \(1 \mathrm{~L}\) solution. The molarity of \(\mathrm{NaOH}\) in the solution is

(Given, that molar mass of \(\mathrm{NaOH}\)

\(=40.0 \mathrm{gmol}^{-1}\) ) [BCECE 2005]

1) \(1000 \mathrm{~g}\) of solvent

2) \(1 \mathrm{~L}\) of solvent

3) \(1 \mathrm{~L}\) of solution

4) \(1000 \mathrm{~g}\) of solution 13. What is molality of a solution in which (18 g glucose mol. wt. \(=180\) ) is dissolved in \(500 \mathrm{~g}\) of water? [MP PET 2003]

1) \(1 \mathrm{~m}\)

2) \(0.5 \mathrm{~m}\)

3) \(0.2 \mathrm{~m}\)

4) \(2 \mathrm{~m}\)

14. A 5.2 molal aqueous solution of methyl alcohol, \(\mathrm{CH}_{3} \mathrm{OH}\), is supplied. What is the mole fraction of methyl alcohol in the solution? [AIEEE

2011]

1) 1.100

2) 0.190

3) 0.086

4) 0.050

15. The volume of water to added to \(100 \mathrm{~cm}^{3}\) of 0.5 \(\mathrm{NH}_{2} \mathrm{SO}_{4}\) to get decinormal concentration is

[BCECE 2008]

1) \(400 \mathrm{~cm}^{3}\)

2) \(450 \mathrm{~cm}^{3}\)

3) \(500 \mathrm{~cm}^{3}\)

4) \(100 \mathrm{~cm}^{3}\)

16. The sum of mole fractions of \(A, B\) and \(C\) in an aqueous solution containing 0.2 moles of each \(A, B\) and \(C\) is [KCET 2011]

1) 0.6

2) 0.2

3) 1.0

4) 1.2

17. A solution contains \(1.2046 \times 10^{24}\) hydrochloric acid molecules in \(1 \mathrm{dm}^{3}\) of the solution. The strength of the solution is [AMU 2006]

1) \(6 \mathrm{~N}\)

2) \(2 \mathrm{~N}\)

3) \(4 \mathrm{~N}\)

4) \(8 \mathrm{~N}\)

18. Molarity of a given orthophosphoric acid solution is \(3 \mathrm{M}\). It's normality is [KCET 2007]

1) \(9 \mathrm{~N}\)

2) \(0.3 \mathrm{~N}\)

3) \(3 \mathrm{~N}\)

4) \(1 \mathrm{~N}\)

19. Density of a \(2.05 \mathrm{M}\) solution of acetic acid in water is \(1.02 \mathrm{~g} / \mathrm{mL}\). The molality of the solution is [UP SEE 2006]

1) \(23.077 \%\)

2) \(230.77 \%\)

3) \(2.3077 \%\)

4) \(0.23077 \%\)

20. How much of \(0.1 \mathrm{M} \mathrm{H}_{2} \mathrm{SO}_{4}\) solution is required to neutralise \(50 \mathrm{~mL}\) of \(0.2 \mathrm{M} \mathrm{NaOH}\) solution?

\section{[Manipal 2003]}

1) \(50 \mathrm{~mL}\)

2) \(5.0 \mathrm{~mL}\)

3) \(0.50 \mathrm{~mL}\)

4) \(100 \mathrm{~mL}\)

21. What is the molality of pure water? [OJEE

\section{8]}

1) 1

2) 18

3) 55.5

4) None of these

22. An aqueous solution of \(6.3 \mathrm{~g}\) oxalic acid dihydrate is made up to \(250 \mathrm{~mL}\). The volume of \(0.1 \mathrm{~N}\) sodium hydroxide required to completely neutralise \(10 \mathrm{~mL}\) of this solution is [J\&K CET 2003]

1) \(40 \mathrm{~mL}\)

2) \(20 \mathrm{~mL}\)

3) \(10 \mathrm{~mL}\)

4) \(4 \mathrm{~mL}\)

23. How many gram of \(\mathrm{NaOH}\) will be required to prepare \(500 \mathrm{~g}\) solution containing \(10 \% \frac{w}{w}\)

\(\mathrm{NaOH}\) solution? [Guj CET 2009]

1) \(100 \mathrm{~g}\)

2) \(50 \mathrm{~g}\)

3) \(0.5 \mathrm{~g}\)

4) \(5.0 \mathrm{~g}\)

24. The ionic strength of solution containing 0.1 \(\mathrm{mol} / \mathrm{kg}\) of \(\mathrm{KCl}\) and \(0.2 \mathrm{~mol} / \mathrm{kg}\) of \(\mathrm{CuSO}_{4}\) is [OJEE

\section{3]}

1) 0.3

2) 0.6

3) 0.9

4) 0.2

25. \(100 \mathrm{cc}\) of \(0.6 \mathrm{~N} \mathrm{H}_{2} \mathrm{SO}_{4}\) and \(200 \mathrm{cc}\) of \(0.3 \mathrm{~N} \mathrm{HCl}\) were mixed together. The normality of the solution will be [J\&K CET 2004]

1) \(0.2 \mathrm{~N}\)

2) \(0.4 \mathrm{~N}\)

3) \(0.8 \mathrm{~N}\)

4) \(0.6 \mathrm{~N}\)

26. In which ratio of volume \(0.4 \mathrm{M} \mathrm{HCl}\) and \(0.9 \mathrm{M}\) \(\mathrm{HCl}\) are to be mixed such that the concentration of the resultant solution becomes \(0.7 \mathrm{M}\) ? [MP

\section{PET 2010]}

1)Air

2)Brass

3)Amalgam

4) Benzene in water

27. The Henry's law constant for the solubility of \(N_{2}\) gas in water at \(298 \mathrm{~K}\) is \(1.0 \times 105 \mathrm{~atm}\). The mole fraction of \(N_{2}\) In air is 0.8 The number of moles of \(N_{2}\) from air dissolved in 10 moles of water of \(298 \mathrm{~K}\) and \(5 \mathrm{~atm}\) pressure is [IIT JEE 2010]

1) \(4 \times 10^{-4}\)

2) \(4.0 \times 10^{-5}\)

3) \(5.0 \times 10^{-4}\)

4) \(4.0 \times 10^{-6}\)

28. \(1 \mathrm{~kg}\) of \(\mathrm{NaOH}\) solution contains \(4 \mathrm{~g}\) of \(\mathrm{NaOH}\). The approximate concentration of the solution is [Manipal 2003]

1)About \(0.1 \mathrm{~N}\)

2) Decinormal

3) 0.1 molal

4) 0.1 molar

29. Volume of water needed to mix with \(10 \mathrm{~mL} \mathrm{~N}\) \(\mathrm{HCl}\) to get \(0.1 \mathrm{~N} \mathrm{HCl}\) is [UP SEE 2006]

1) \(900 \mathrm{~mL}\)

2) \(9 \mathrm{~mL}\)

3) \(90 \mathrm{~mL}\)

4) \(100 \mathrm{~mL}\)

30. Molarity of \(0.2 \mathrm{~N} \mathrm{H}_{2} \mathrm{SO}_{4}\) is [KCET 2005] 

1) 0.2

2) 0.4

3) 0.6

4) 0.1

31. \(25 \mathrm{~mL}\) of a solution of barium hydroxide on titration with 0.1 molar solution of hydrochloric acid gave a titre value of \(35 \mathrm{~mL}\). The molarity of barium hydroxide solution was [J\&K CET 2007]

1) \(\mathrm{ppm}\)

2) \(\mathrm{Mg} / 100 \mathrm{cc}\)

3) g/L

4) \(\mathrm{g} / 100 \mathrm{cc}\)

32. \(40 \%\) by weight solution will contain how much mass of the solute in 1L solution, density of the solution is \(1.2 \mathrm{~g} / \mathrm{mL}\) ? [DCE 2007]

1) \(480 \mathrm{~g}\)

2) \(48 \mathrm{~g}\)

3) \(38 \mathrm{~g}\)

4) \(380 \mathrm{~g}\)

33. Two solutions of substance (non-electrolyte) are mixed in the following manner.

\(480 \mathrm{~mL}\) of \(1.5 \mathrm{M}\) first solution \(+520 \mathrm{~mL}\) of 1.2

M second solution.

What is the molarity of the final mixture?

\section{[AIEEE 2005]}

1) \(2.70 \mathrm{M}\)

2) \(1.344 \mathrm{M}\)

3) \(1.50 \mathrm{M}\)

4) \(1.20 \mathrm{M}\)

34. \(5 \mathrm{~L}\) of a solution contains \(25 \mathrm{mg}\) of \(\mathrm{CaCO}_{3}\).

What is its concentration in ppm? (mol. wt. of \(\mathrm{CaCO}_{3}\) is 100) [J\&K CET 2006]

1) 25

2) 1

3) 5

4) 2500

35. At STP, a container has 1 mole of Ar, 2 moles of \(\mathrm{CO}_{2}, 3\) moles of \(\mathrm{O}_{2}\) and 4 moles of \(\mathrm{N}_{2}\). Without changing the total pressure if one mole of \(\mathrm{O}_{2}\) is removed, the partial pressure of \(\mathrm{O}_{2}\) is

[MHT

CET 2006]

1)Changed by about 2) Halved \(16 \%\)

3) Changed by \(26 \%\)

4) Unchanged

36. How many grams of sulphuric acid is to be dissolved to prepare \(200 \mathrm{~mL}\) aqueous solution having concentration of \(\left[\mathrm{H}_{3} \mathrm{O}^{+}\right]\)ions \(1 \mathrm{M}\) at 25 \({ }^{\circ} \mathrm{C}\) temperature.

[GUJ CET 2011]

1) \(4.9 \mathrm{~g}\)

2) \(19.6 \mathrm{~g}\)

3) \(9.8 \mathrm{~g}\)

4) \(0.98 \mathrm{~g}\)

37. What is molarity of \(K^{+}\)in aqueous solution that contains \(17.4 \mathrm{ppm}\) of \(\mathrm{K}_{2} \mathrm{SO}_{4}\left(174 \mathrm{gmol}^{-1}\right)\) ?

[Guj CET 2006]

1) \(2 \times 10^{-2} M\)

2) \(2 \times 10^{-3} M\)

3) \(4 \times 10^{-4} M\)

4) \(2 \times 10^{-4} M\)

38. \(35.4 \mathrm{~mL}\) of \(\mathrm{HCl}\) is required for the neutralisation of a solution containing \(0.275 \mathrm{~g}\) of sodium hydroxide. The normality of hydrochloric acid is [WB JEE 2006]

1) \(0.97 \mathrm{~N}\)

2) \(0.142 \mathrm{~N}\)

3) \(0.194 \mathrm{~N}\)

4) \(0.244 \mathrm{~N}\)

39. How many moles of \(\mathrm{Al}_{2}\left(\mathrm{SO}_{4}\right)_{3}\) would be in \(50 \mathrm{~g}\) of the substance? [UP CPMT 2005]

1) \(0.083 \mathrm{~mol}\)

2) \(0.952 \mathrm{~mol}\)

3) \(0.481 \mathrm{~mol}\)

4) \(0.140 \mathrm{~mol}\)

40. Which of the following concentration factors is affected by change in temperature? [MHT CET 2008]

1) Molarity

2) Molality

3) Mole fraction

4) Weight fraction

41. The unit of molality is [Jamia Millia Islamia 2004]

1) \(\operatorname{mol} L^{-1}\)

2) \(\mathrm{mol} \mathrm{kg}\)

3) \(\mathrm{mol}^{-1} L^{-1}\)

4) mol L

42. Density of a \(2.05 \mathrm{M}\) solution of acetic acid in water is \(1.02 \mathrm{~g} / \mathrm{mL}\). The molality of the solution is [AIEEE 2007]

1) \(1.14 \mathrm{~mol} \mathrm{~kg}^{-1}\)

2) \(3.28 \mathrm{~mol} \mathrm{~kg}^{-1}\)

3) \(2.28 \mathrm{~mol} \mathrm{~kg}^{-1}\)

4) \(0.44 \mathrm{~mol} \mathrm{~kg}^{-1}\)

43. The molality of a urea solution in which \(0.0100 \mathrm{~g}\) of urea, \(\left[\left(\mathrm{NH}_{2} \mathrm{O}_{2} \mathrm{CO}\right]\right.\) is added to \(0.3000 \mathrm{dm}^{3}\) of water at STP is [AIEEE 2011]

1) \(0.555 \mathrm{~m}\)

2) \(5.55 \times 10^{-4} \mathrm{~m}\)

3) \(33.3 \mathrm{~m}\)

4) \(3.33 \times 10^{-2} \mathrm{~m}\)

44. The density \(\left(\right.\) in \(\left.g m L^{-1}\right)\) of a \(3.60 \mathrm{M}\) sulphuric acid solution that is \(29 \%\)

\(\mathrm{H}_{2} \mathrm{SO}_{4}\) (molar mass \(=98 \mathrm{~g} \mathrm{~mol}^{-1}\) ) by mass will be [AIEEE 2007]

1) 1.64

2) 1.88

3) 1.22

4) 1.45

45. The molarity of the solution obtained by dissolving \(2.5 \mathrm{~g}\) of \(\mathrm{NaCl}\) in \(100 \mathrm{~mL}\) of water is [J\&K CET 2007]

1) 0.00428 moles

2) 428 moles

3) 0.428 moles

4) 0.0428 moles

46. The volume of water to be added to \(\frac{N}{2} \mathrm{HCl}\) to prepare \(500 \mathrm{~cm}^{3}\) of \(\frac{N}{10}\) solution is

[RPET 

1) \(450 \mathrm{~cm}^{3}\)

2) \(100 \mathrm{~cm}^{3}\)

3) \(45 \mathrm{~cm}^{3}\)

4) \(400 \mathrm{~cm}^{3}\)

47. How many grams of dibasic acid (mol. wt. 200) should be present in \(100 \mathrm{~mL}\) of the aqueous solution to give \(0.1 \mathrm{~N}\) ? [MHT CET 2006]

1) \(10 \mathrm{~g}\)

2) \(20 \mathrm{~g}\)

3) \(2 \mathrm{~g}\)

4) \(1 \mathrm{~g}\)

48. A solution is prepared by dissolving \(24.5 \mathrm{~g}\) of sodium hydroxide in distilled water to give \(1 \mathrm{~L}\) solution. The molarity of \(\mathrm{NaOH}\) in the solution is

(Given, that molar mass of \(\mathrm{NaOH}\)

\(=40.0 \mathrm{gmol}^{-1}\) )

[AMU 2005]

1) \(0.2450 \mathrm{M}\)

2) \(0.6125 \mathrm{M}\)

3) \(0.9800 \mathrm{M}\)

4) \(1.6326 \mathrm{M}\)

49. Which of the following concentration units is independent of temperature? [J\&K CET 2008]

1) Normality

2) Molarity

3) Molality

4) ppm

50. \(50 \mathrm{~cm}^{3}\) of \(0.2 \mathrm{~N} \mathrm{HCl}\) is titrated against \(0.1 \mathrm{~N}\) \(\mathrm{NaOH}\) solution. The titration is discontinued after adding \(50 \mathrm{~cm}^{3}\) of \(\mathrm{NaOH}\). The remaining titration is completed by adding \(0.5 \mathrm{NKOH}\). The volume of \(\mathrm{KOH}\) required for completing the titration is [KCET 2010]

1) \(12 \mathrm{~cm}^{3}\)

2) \(10 \mathrm{~cm}^{3}\)

3) \(25 \mathrm{~cm}^{3}\)

4) \(10.5 \mathrm{~cm}^{3}\)

51. Volume of water needed to mix with \(10 \mathrm{~mL} 10\) \(\mathrm{N} \mathrm{HNO} \mathrm{H}_{3}\) to get \(0.1 \mathrm{~N} \mathrm{HNO}_{3}\) is [UP CPMT 2003]

1) \(1000 \mathrm{~mL}\)

2) \(990 \mathrm{~mL}\)

3) \(1010 \mathrm{~mL}\)

4) \(10 \mathrm{~mL}\)

52. The volume of \(10 \mathrm{~N}\) and \(4 \mathrm{~N} \mathrm{HCl}\) required to make \(1 \mathrm{~L}\) of \(7 \mathrm{~N} \mathrm{HCl}\) are [KCET 2007]

1) \(0.50 \mathrm{~L}\) of \(10 \mathrm{~N} \mathrm{HCl}\)

2) \(0.60 \mathrm{~L} \mathrm{of} 10 \mathrm{~N} \mathrm{HCl}\) and \(0.05 \mathrm{~L}\) of \(4 \mathrm{~N}\) and \(0.40 \mathrm{~L}\) of \(4 \mathrm{~N} \mathrm{HCl}\) \(\mathrm{HCl}\)

3) \(0.80 \mathrm{~L}\) of \(10 \mathrm{~N} \mathrm{HCl}\)

4) \(0.75 \mathrm{~L} \mathrm{of} 10 \mathrm{~N} \mathrm{HCl}\) and \(0.20 \mathrm{~L}\) of \(4 \mathrm{~N}\) and \(0.25 \mathrm{~L}\) of \(4 \mathrm{~N} \mathrm{HCl}\) \(\mathrm{HCl}\)

53. What is the molarity of \(\mathrm{H}_{2} \mathrm{SO}_{4}\) solution if 25 \(\mathrm{mL}\) is exactly neutralised with \(32.63 \mathrm{~mL}\) of \(0.164 \mathrm{M} \mathrm{NaOH}\) ? [DCE 2003]

1) \(0.107 \mathrm{M}\)

2) \(0.126 \mathrm{M}\)

3) \(0.214 \mathrm{M}\)

4) \(-0.428 \mathrm{M}\)

54. Volume of \(0.6 \mathrm{M} \mathrm{NaOH}\) required to neutralise \(30 \mathrm{~cm}^{3}\) of \(0.4 \mathrm{M} \mathrm{HCl}\) is [AMU 2007]

1) \(20 \mathrm{~cm}^{3}\)

2) \(40 \mathrm{~cm}^{3}\)

3) \(45 \mathrm{~cm}^{3}\)

4) \(30 \mathrm{~cm}^{3}\)

55. Volume of \(0.6 \mathrm{M} \mathrm{NaOH}\) required to neutralise \(30 \mathrm{~cm}^{3}\) of \(0.4 \mathrm{M} \mathrm{HCl}\) is [EAMCET 2007]

1) \(3: 4\)

2) \(1: 2\)

3) \(1: 4\)

4) \(1: 1\)

56. What is the total number of moles of \(\mathrm{H}_{2} \mathrm{SO}_{4}\) needed to prepare \(5.0 \mathrm{~L}\) of a \(2.0 \mathrm{M}\) solution of \(\mathrm{H}_{2} \mathrm{SO}_{4}\) ? [UP SEE 2009]

1) 2.5

2) 5.0

3) 10

4) 20

57. Which one is correct? [DCE 2007]

1) Molality changes

2) Molality does not with temperature. change with temperature.

3) Molarity does not

4) Normality does not change with change with temperature. temperature.

58. \(2.5 \mathrm{~L}\) of \(\mathrm{NaCl}\) solution contain 5 moles of the solute.What is the molarity? [UP SEE 2009]

1) \(5 \mathrm{M}\)

2) \(2 \mathrm{M}\)

3) \(2.5 \mathrm{M}\)

4) \(12.5 \mathrm{M}\)

59. \(25 \mathrm{~mL}\) of a solution of barium hydroxide on titration with 0.1 molar solution of hydrochloric acid gave a titre value of \(35 \mathrm{~mL}\). The molarity of barium hydroxide solution was [MP PET 2007]

1) 0.07

2) 0.14

3) 0.28

4) 0.35

60. Molarity is expressed as [MP PET 2008]

1) \(\mathrm{L} / \mathrm{mol}\)

2) \(\mathrm{Mol} / \mathrm{L}\)

3) \(\mathrm{Mol} / 1000 \mathrm{~g}\)

4)g/L

61. Calculate the normality of \(250 \mathrm{~mL}\) aqueous solution of \(\mathrm{H}_{2} \mathrm{SO}_{4}\) having \(\mathrm{pH}=0.00\). [Guj CET

\section{0]}

1) \(0.25 \mathrm{~N}\)

2) \(0.50 \mathrm{~N}\)

3) \(1 \mathrm{~N}\)

4) \(2 \mathrm{~N}\)

62. If \(117 \mathrm{~g} \mathrm{NaCl}\) is dissolved in \(1000 \mathrm{~g}\) of water the concentration of the solution is said to be

[Kerala CEE 2003]

1) 2 molar

2) 2 molal

3) 1 normal

4)1 molal

5) 2 normal

63. To neutralise completely \(20 \mathrm{~mL}\) of \(0.1 \mathrm{M}\) aqueous solution of phosphorous acid \(\left(\mathrm{H}_{3} \mathrm{PO}_{3}\right)\),the volume of \(0.1 \mathrm{M}\) aqueous \(\mathrm{KOH}\) solution required is [Jamia Millia Islamia 2007]

1) \(10 \mathrm{~mL}\)

2) \(20 \mathrm{~mL}\)

3) \(40 \mathrm{~mL}\)

4) \(60 \mathrm{~mL}\)

64. What amount of water is added in \(40 \mathrm{~mL}\) of \(\mathrm{NaOH}(0.1 \mathrm{~N})\) which is neutralised by \(50 \mathrm{~mL}\) of \(\mathrm{HCl}(0.2 \mathrm{~N})\) ? [BCECE 2004]

1) \(80 \mathrm{~mL}\)

2) \(60 \mathrm{~mL}\)

3) \(40 \mathrm{~mL}\)

4) \(90 \mathrm{~mL}\)

65. Assuming that sea water is a 3.50 weight per cent aqueous solution of \(\mathrm{NaCl}\). What is the molality of sea water? [GUJ CET 2006]

1) \(0.062 \mathrm{~m}\)

2) \(0.0062 \mathrm{~m}\)

3) \(0.62 \mathrm{~m}\)

4) \(6.2 \mathrm{~m}\)

66. Mole fraction of solute in benzene is 0.2 then find molality of solute [BCECE 2004]

1) 3.2

2) 2

3) 4

4) 3.6

67. The normality of mixture obtained by mixing \(100 \mathrm{~mL}\) of \(0.2 \mathrm{M} \mathrm{H}_{2} \mathrm{SO}_{4}+\) \(100 \mathrm{~mL}\) of \(0.2 \mathrm{M} \mathrm{NaOH}\) is [BCECE 2004]

1) The nature of gas

2) The temperature

3) The nature of the

4) All of the above solvent

68. Two bottles \(A\) and \(B\) contains \(1 \mathrm{M}\) and \(1 \mathrm{~m}\) aqueous solution of sulphuric acid respectively

\section{[Manipal 2008]}

1) \(A\) is more

2) \(B\) is more concentrated than \(B \quad\) concentrated than \(A\)

3) Concentration of \(A\) is 4) It is not possible to equal to compare the concentration of \(B \quad\) concentrations

69. \(10 \mathrm{~cm}^{3}\) of \(0.1 \mathrm{~N}\) monobasic acid requires \(15 \mathrm{~cm}^{3}\) of sodium hydroxide solution whose normality is [KCET 2008]

1) \(1.5 \mathrm{~N}\)

2) \(0.15 \mathrm{~N}\)

3) \(0.066 \mathrm{~N}\)

4) \(0.66 \mathrm{~N}\)

70. A 5 molar solution of \(\mathrm{H}_{2} \mathrm{SO}_{4}\) is diluted from \(1 \mathrm{~L}\) to \(10 \mathrm{~L}\). What is the normality of the solution? [MP PET 2006]

1) \(0.25 \mathrm{~N}\)

2) \(1 \mathrm{~N}\)

3) \(2 \mathrm{~N}\)

4) \(7 \mathrm{~N}\)

71. Which of the following concentration term is/are independent of temperature? [Kerala CEE 2006]

1) Molarity

2) Molarity and mole fraction

3) Mole fraction and

4) Molality and molality normality

5) Only molality

72. The normality of mixture obtained by mixing \(100 \mathrm{~mL}\) of \(0.2 \mathrm{M} \mathrm{H}_{2} \mathrm{SO}_{4}+\) \(100 \mathrm{~mL}\) of \(0.2 \mathrm{M} \mathrm{NaOH}\) is

1) 0.2

2) 0.01

3) 0.1

4) 0.3

73. A binary liquid solution ois prepared by mixing \(n\)-heptane and ethanol. Which one of the following statements is correct regarding the behaviour of the solution? [AIEEE 2009]

1)The solution formed 2) The solution is is an ideal solution non-ideal, showing positive deviation from Raoult's law

3) The solution is

4) \(n\)-heptane shows non-ideal, showing positive deviation negative deviation while ethanol show from Raoult's law negative deviation from Raoult's law

74. One component of a solution follows Raoult's law over the entire range \(0 \leq x_{1} \leq 1\). The second component must follow Raoult's law in the range when \(x_{2}\) is [AMU 2009]

1) Close to zero

2) Close to 1

3) \(0 \leq x_{2} \leq 05\)

4

\(0 \leq x_{2} \leq 1\)

75. If liquids \(A\) and \(B\) form an ideal solution, the [AMU 2003]

1) Enthalpy of mixing is2) Entropy of mixing is zero zero

3) Free energy of

4) Free energy as well mixing is zero as the entropy of mixing are each zero

76. Which of the following liquid pairs shows a positive deviation from Raoult's law? [AIEEE 2004]

1) Water-hydrochloric 2)Benzene-methanol acid

3)Water-nitric acid 4)Acetone-chloroform

77. An azeotropic mixture of two liquids has boiling point lower than either of them, when it [BCECE 2003]

1)Shows a negative 2)Shows no deviation deviation from from Raoult's law 

3) Shows positive

4) Is saturated

deviation from

Raoult's law

78. On mixing, heptane and octane form an ideal solution. At \(373 \mathrm{~K}\), the vapour pressures of the two liquid components (heptanes and octane) are \(105 \mathrm{kPa}\) and \(45 \mathrm{kPa}\) respectively. Vapour pressure of the solution obtained by mixing 25 \(\mathrm{g}\) of heptanes and \(35 \mathrm{~g}\) of octane will be (molar mass of heptanes \(=100 \mathrm{~g} \mathrm{~mol}^{-1}\) and of octane \(=114 \mathrm{gmol}^{-1}\) ). [AIEEE 2011]

1) \(72.0 \mathrm{kPa}\)

2) \(36.1 \mathrm{kPa}\)

3) \(96.2 \mathrm{kPa}\)

4) \(144.5 \mathrm{kPa}\)

79. In a mixture of \(A\) and \(B\), components show negative deviation when [Jamia Millia

\section{Islamia 2005]}

1) \(A-B\) interaction is

2) \(A-B\) interaction is stronger than \(A-A \quad\) weaker than \(A-A\) and \(B-B\) interaction and \(B-B\) interaction 3) \(\Delta V_{\text {mix }}>0, \Delta S_{\text {mix }}>\) 1\(_{4)} \Delta V_{\text {mix }}=0, \Delta S_{\text {mix }}>C\)

80. Formation of a solution from two components can be considered as

(1) pure solvent \(\rightarrow\) separated solvent molecules, \(\Delta H_{1}\)

(2) pure solute \(\rightarrow\) separated solvent molecules, \(\Delta H_{2}\)

(3) separated solvent and solute molecules \(\rightarrow\) solution, \(\Delta H_{3}\)

Solution so formed will be ideal if [UP SEE 2007]

\[

\begin{aligned}

& \text { 1) } \Delta H_{\text {soln }}=\Delta H_{1}-\Delta H_{22} \Delta H_{\text {soln }}=\Delta H_{3}-\Delta H_{1} \\

& \text { 3) } \Delta H_{\text {soln }}=\Delta H_{1}+\Delta H_{24)} \Delta H_{\text {soln }}=\Delta H_{1}+\Delta H_{2}

\end{aligned}

\]

81. A non-ideal solution was prepared by mixing \(30 \mathrm{~mL}\) chloroform and \(50 \mathrm{~mL}\) acetone. The volume of mixture will be [Jamia Millia Islamia 2004]

1) \(>80 \mathrm{~mL}\)

2) \(<80 \mathrm{~mL}\)

3) \(=80 \mathrm{~mL}\)

4) \(\geq 80 \mathrm{~mL}\)

82. At \(80^{\circ} C\), the vapour pressure of pure liquid ' \(A\) ' is \(520 \mathrm{~mm} \mathrm{Hg}\) and that of pure liquid ' \(B\) ' is 1000 \(\mathrm{mm} \mathrm{Hg}\). If a mixture solution of ' \(A\) ' and ' \(B\) ' boils at \(80^{\circ} \mathrm{C}\) and \(1 \mathrm{~atm}\) pressure, the amount of ' \(A\) ' in the mixture is

(1 \(\mathrm{atm}=760 \mathrm{~mm} \mathrm{Hg})\)

[AIEEE 2008]

1) 52 mole per cent

2) 34 mole per cent

3) 48 mole per cent

4) 50 mole per cent

83. A solution of two liquids boils at a temperature more than the boiling point of either them. Hence, the binary solution shows [KCET 2003]

1) Negative deviation

2) Positive deviation from Raoult's law from Raoult's law

3) No deviation from

4) Positive or negative deviation from Raoult's law depending upon the composition

84. Azeotropic mixture of \(\mathrm{HCl}\) and water has [J\&K

\section{CET 2004]}

1) \(48 \% \mathrm{HCl}\)

2) \(22.2 \% \mathrm{HCl}\)

3) \(36 \% \mathrm{HCl}\)

4) \(20.2 \% \mathrm{HCl}\)

85. At \(25^{\circ} \mathrm{C}\), the total pressure of an ideal solution obtained by mixing 3 moles of ' \(A\) ' and 2 moles of ' \(B\) ', is 184 torr. What is the vapour pressure (in torr) of pure ' \(B\) ' at the same temperature?

(Vapour pressure of pure ' \(A\) ' at \(25^{\circ} C\) is 200 torr) [J\&K CET 2006]

1) 180

2) 160

3) 16

4) 100

86. A mixture of ethyl alcohol and propyl alcohol has a vapour pressure of \(290 \mathrm{~mm}\) at \(300 \mathrm{~K}\). the vapour pressure of propyl alcohol is \(200 \mathrm{~mm}\). If the mole fraction of ethyl alcohol is 0.6 , its vapour pressure (in \(\mathrm{mm}\) ) at the same temperature will be

[AIEEE 2007]

1) 350

2) 300

3) 700

4) 360

87. Which one of the following is not correct for an ideal solution? [Jamia Millia Islamia 2006] 1) It must obey Raoult's2) \(\Delta H=0\) law

3) \(\Delta V=0\)

4) \(\Delta \mathrm{H}=\mathrm{V} \neq 0\)

88. Two liquids \(X\) and \(Y\) form an ideal solution. The mixture has a vapour pressure of \(400 \mathrm{~mm}\) at \(300 \mathrm{~K}\) when mixed in the molar ratio of \(1: 1\) and a vapour pressure of \(350 \mathrm{~mm}\) when mixed in the molar ratio of \(1: 2\) at the same temperature. The vapour pressures of the two pure liquids \(X\) and \(Y\) respectively are

[Kerala CEE 2008]

1) \(250 \mathrm{~mm}, 550 \mathrm{~mm}\)

2) \(350 \mathrm{~mm}, 450 \mathrm{~mm}\)

3) \(350 \mathrm{~mm}, 700 \mathrm{~mm}\)

4) \(500 \mathrm{~mm}, 500 \mathrm{~mm}\)

5) \(550 \mathrm{~mm}, 250 \mathrm{~mm}\)

89. Vapour pressure of pure ' \(A\) ' is \(70 \mathrm{~mm}\) of \(\mathrm{Hg}\) at \(25^{\circ} \mathrm{C}\). It from an ideal solution with ' \(B\) ' in which mole fraction of \(A\) is 0.8 . If the vapour pressure of the solution is \(84 \mathrm{~mm}\) of \(\mathrm{Hg}\) at \(25^{\circ} \mathrm{C}\), the vapour pressure of pure ' \(B\) ' at \(25^{\circ} C\) is [Manipal 2009]

1) \(28 \mathrm{~mm}\)

2) \(56 \mathrm{~mm}\)

3) \(70 \mathrm{~mm}\)

4) \(140 \mathrm{~mm}\)

90. Benzene and toluene form nearly ideal solutions. At \(25^{\circ} \mathrm{C}\), the vapour pressure of benzene is 75 torr and that of toluene is 22 torr. The partial vapour pressure of benzene at \(20^{\circ} \mathrm{C}\) for a solution containing \(78 \mathrm{~g}\) of benzene and \(46 \mathrm{~g}\) of toluene in torr is [AIEEE 2005]

1) 53.5

2) 37.5

3) 25

4) 50

91. \(A\) and \(B\) ideal gases. The molecular weights of \(A\) and \(B\) are in the ratio of \(1: 4\). The pressure of a gas mixture containing equal weight of \(A\) and \(B\) is \(p\) atm. What is the partial pressure (in atm) of \(B\) in the mixture? [EAMCET 2005]

\(\begin{array}{llll}\text { 1) } & \frac{P}{5} & \text { 2) } & \frac{P}{2} \\ \text { 3) } & \frac{P}{2.5} & \text { 4) } & \frac{3 P}{4}\end{array}\)

92. Which of the following mixture does not show positive deviation from the Raoult's law? [MP PET 2003]

1) Benzene + acetone

2)Acetone + ethanol

3) Acetone +

4) Water + ethanol chloroform

93. The vapour pressure of two liquids \(X\) and \(Y\) are 80 and 60 Torr respectively. The total vapour pressure of the ideal solution obtained by mixing 3 moles of \(X\) and 2 moles of \(Y\) would be [Kerala CEE 2009]

1) 68 Torr

2) 140 Torr

3) 48 Torr

4) 72 Torr

5) 54 Torr

94. The vapour pressure of a pure liquid \(A\) is 40 \(\mathrm{mm} \mathrm{Hg}\) at \(310 \mathrm{~K}\). The vapour pressure of this liquid in a solution with liquid \(B\) is \(32 \mathrm{~mm} \mathrm{Hg}\). What is the mole fraction of \(A\) in the solution if it obeys the Raoult's law? [Punjab CET 2010]

1) 0.5

2) 0.6

3) 0.7

4) 0.8

95. Equal masses of methane and oxygen are mixed in an empty container at \(25^{\circ} \mathrm{C}\). The fraction of the total pressure exerted by oxygen is [AIEEE 2007]

1) \(\frac{2}{3}\)

2) \(\frac{1}{3} \times \frac{273}{298}\)

3)

\(\frac{1}{3}\)

4) \(\frac{1}{2}\)

96. Vapour pressure of pure \(A=100\) torr, moles \(=\) 2 ; vapour pressure of pure \(B=80\) torr, moles \(=\) 3 . Total vapour pressure of the mixture is [OJEE 2008]

1) 440 torr

2) 460 torr

3) 180 torr

4) 88 torr

97. On a humid day in summer, the mole fraction of gaseous a \(\mathrm{H}_{2} \mathrm{O}\) (water vapour) in the air at \(25^{\circ} \mathrm{C}\) can be as high as 0.0287 . Assuming a total pressure of 0.977 atm. What is the partial pressure of dry air? [Kerala CEE 2006]

1) \(94.9 \mathrm{~atm}\)

2) \(0.949 \mathrm{~atm}\)

3) \(949 \mathrm{~atm}\)

4) \(0.648 \mathrm{~atm}\)

5) \(1.248 \mathrm{~atm}\)

98. Two liquids \(X\) and \(Y\) form an ideal solution at \(300 \mathrm{~K}\), vapour pressure of the solution containing \(1 \mathrm{~mol}\) of \(X\) and 3, mol of \(Y\) is 550 \(\mathrm{mmHg}\). At the same temperature, if \(1 \mathrm{~mol}\) of \(Y\) is further added to this solution, vapour pressure of the solution increases by \(10 \mathrm{mmHg}\). Vapour pressure (in \(\mathrm{mmHg}\) ) of \(X\) and \(Y\) in their pure states will be, respectively [AIEEE 2009]

1) 200 and 300

2) 300 and 400

3) 400 and 600

4) 500 and 600

99. The vapour pressure of water at \(23^{\circ} \mathrm{C}\) is 19.8 mm. 0.1 mole of glucose is dissolved in \(178.2 \mathrm{~g}\) of water. What is the vapour pressure (in \(\mathrm{mm}\) ) of the resultant solution? [EAMCET 2005]

1) 19.0

2) 19.602

3) 19.402

4) 19.202

100.At certain temperature a \(5.12 \%\) solution of cane sugar is isotonic with a \(0.9 \%\) solution of an unknown solute. The molar mass of solute is [Kerala CEE 2006]

1) 60

2) 46.17

3) 120

4) 90

5) 92.34