Chemistry_Class-12_Chapter1_MCQs

1. The amount of anhydrous Na₂CO₃ present in 250 mL of 0.25 M solution is [DPMT 2001]

2. What will be the molarity of a solution containing 5 g of sodium hydroxide in 250 ml solution.

3. The molarity of a solution made by mixing 50mL of conc. H2SO4 (36N) with 50 mL of water is

4. Two solutions of a substance (non electrolyte) are mixed in the following manner .480 mL of 1.5M first solution + 520 mL of 1.2M second solution. What is the molarity of the final mixture

5. 10.6 grams of a substance of molecular weight 106 was dissolved in 100mL. 10mL of this solution was pipetted out into a 1000mL flask and made up to the mark with distilled water. The molarity of the resulting solution is

6. To prepare a solution of concentration of 0.03 g/mL of AgNO3, what amount of AgNO3, should be added in 60 mL of solution

7. Which of the following concentration is affected by change in temperature

8. The molarity of a solution of Na₂CO₃ having 10.6g/500mL of solution is(DCE 2002)

9. An aqueous solution of glucose is 10% in strength. The volume in which 1 mole of it is dissolved will be [AFMC 1992; DCE 2000]

10. 6.02x1020 molecules of urea are present in 100 mL of its solution. The concentration of urea solution is

11. 40% by weight solution will contain how much mass of the solute in 1 L solution, density of the solution is 1.2 g/mL [DCE 2007]

12. What is the molarity of H2SO4 solution, that has a density 1.84 g/cc at 35◦ C and contains solute 98% by weight

13. The concentration of an aqueous solution of 0.01M CH3OH solution is very nearly equal to which of the following

14. 6.02x1020 molecules of urea are present in 100 mL of its solution. The concentration of urea solution is

15. 40% by weight solution will contain how much mass of the solute in 1 L solution, density of the solution is 1.2 g/mL [DCE 2007]

16. What is the molarity of H2SO4 solution, that has a density 1.84 g/cc at 35◦ C and contains solute 98% by weight

17. For converting a solution if concentration into a solution of The quantity of water added is 100 mL KCI of 0.4 M KCI, 0.05 M concentration

18. The molarity of a solution obtained by mixing 800 mL of 0.5 M HCl with 200 mL of 1 M HCI will be

19. Dissolving 120g of urea (mol. wt. 60) in 1000g of water gave a solution of density 1.15g/mL. The molarity of the solution is

20. In which ratio of volumes 0.4 M HCl and 0.9 M HCI are to be mixed such that the concentration of the resultant solution becomes 0.7 M

21. How many grams of glucose be dissolved to make one litre solution of 10% glucose

22. 8.50 g of NH3 is present in 250 mL volume. Its active mass is [UPSEE 2016]

23. 20 mL of HCI solution requires 19.85 mL of 0.01 M NaOH solution for complete neutralization. The molarity of HCI solution is [MP PMT 1999, 2007)

24. If 5.85 g of NaCl (molecular weight 58.5) is dissolved in water and the solution is made up to 0.5 litre, the molarity of the solution will be

25. 25mL of a solution of barium hydroxide on titration with a 0.1molar solution of hydrochloric acid gave a titre value of 35 mL. The molarity of barium hydroxide solution was

26. 3.0 molal NaOH solution has a density of 1.110 g/mL. The molarity of the solution is

27. Which of the following should 0.40M NaCI starting with 100 ml of 0.30M NaCI [BIT 1992] (mol.wt. of NaCl = 58.5)

28. The density of a 3M solution is 1.25g/mL. sodium thiosulphate (Na2S2O3) Calculate the percent by weight of

29. Concentrated Aqueous solution sulphuric acid 98% H₂SO₄ by mass and has a density of 1.80 g.ml-1 . Volume of acid required to make 1 litre of 0.1 MH₂SO₄ solution

30. The molarity of pure water is [CPMT 1974, 88, 90; CMC Veliore 1991; RPET 1999;MP PMT 1999, 2005; AMU 2002]

31. If 500 mL of a 5 M solution is diluted to 1500 mL, what will be the molarity of the solution obtained [NCERT Exemplar]

32. If the concentration of glucose (C6H12O6) in blood is 0.9 g L -1 what will be the molarity of glucose in blood

33. The density (in g mL - 1)of a 3.60 M sulphuric acid solution that is 29% H2SO4 (Molar mass = 98 g mol -1 ) by mass will be

34. In an experiment it showed that 10 mL of 0.05M solution of chloride required 10mL of 0.1M solution of AgNO3 which of the following will be the formula of the chloride (X stands for the symbol of the element other than chlorine)

35. How many grams of concentrated nitric acid solution 70% HNO3 should be used to prepare 250mL of 2.0 M HNO3

36. If 10 mL of 0.1 M aqueous solution of NaCl is divided into 1000 drops of equal volume. What will be the concentration of one drop

37. Equal volumes of molar hydrochloric acid and sulphuric acid are neutralised by dilute NaOH solution and x k cal and y k cal of heat are liberated respectively. Which of the following is true

38. The concentration of H2O2 solution of '10 volume' is

39. If one litter of aqueous solution of FeCl3 (molecular weight = 162) contains 20.0 ml of a solution of FeCl3 of density 1.1g/ml, find the molar concentration of this solution.

40. The volumes of 4 NHCI and 10 N HCI required to make 1 litre of 6 N HCI are [Kerala PMT 2004]

41. The amount of K2Cr2O7 prepare 100 mL of its 0.05 N (eq. wt. 49.04) required to solution is

42. The normality of a solution of sodium hydroxide 100 mL of which contains 4 grams of NaOH is

43. Which of the following solutions has the highest normality

44. With 63 g of hydrated oxalic acid how many N/10 solution can be prepared

45. How many grams of dibasic acid (mol. wt. 200) should be present in 100 mL of its aqueous solution to give decinormal strength

46. The volume of water to be added to 100cm³ of 0.5 N H₂SO₄ to get decinormal concentration is [KCET (Engg.) 2001; CPMT 2006; MP PET 2013]

47. Volume of water needed to mix with 10 mL 10N HNO3 to get 0.1 NHNO3

48. Two solutions of HCI, A and B, have concentrations of 0.5N and 0.1M respectively. The volume of solutions A and B required to make 2 litres of 0.2N HCI are

49. A solution contains 1.2046 x 1024 hydrochloric acid molecules in one dm³ of the solution. The strength of the solution is

50. Normality of 2M sulphuric acid is

51. To neutralise completely 20 mL of 0.1 M aqueous solution of phosphorous acid (H3PO3). the volume of 0.1 M aqueous KOH solution required is

52. On dissolving 1 mole of each of the following acids in 1 litre water, the acid which does not give a solution of strength 1N is

53. 10ml of conc. H2SO4 (18 molar) is diluted to 1 litre. The approximate strength of dilute acid could be

54. The weight of sodium carbonate required to prepare 500 mL of a semi normal (0.5 N) solution is

55. 20 mL of 10 NHCI are mixed with 10 mL of 36 N H2SO4 and the mixture is made one litre. Normality of the mixture. will be

56. 35.4 mL of HCI is required for the neutralization of a solution containing 0.275 g of sodium hydroxide , The normality of hydrochloric acid is

57. 2 NHCI solution will have same molar conc. as a

58. 10cm³ of 0.1N monobasic acid requires 15cm3 of sodium hydroxide solution whose normality is( [KCET 2008)

59. Assuming that sea water is an aqueous solution of NaCI its density is 1.025 g/mL at 20 0 C and NaCl concentration is 3.5% (by mass), the normality of the sea water is

60. What weight of hydrated oxalic acid should be added for complete neutralization of 100mL of 0.2N -NaOH solution[MP PMT 1997]

61. The normality of 0.3M phosphorus acid (H3PO3) is

62. The normality of 10 volume hydrogen peroxide is [Kerala CET (Med.) 2003: AMU (Med.) 2012]

63. When a solute is present in trace quantities the following expression is used [Kerala CET (Med.) 2002]

64. When a solute is present in trace quantities the following expression is used [Kerala CET (Med.) 2002]

65. The mole fraction of water in 20% aqueous solution ( By weight) of H2O2 is [EAMCET 1993]

66. When 6g urea dissolve in 180 g H2O. The mole fraction of urea is

67.What is the mole fraction of the solute in a 1.00 m aqueous solution[AIPMT 2015]

68. An X molal solution of a compound in benzene has mole fraction of solute equal to 0.2. The value of X is[KCET 1996; DCE 2001]

69.The mole fraction of a solvent in aqueous solution is 0.8. The molality (in mol kg¹) of the aqueous solution is______ [JEE (Main) 2019]

70.8g of NaOH is dissolved in 18g of H₂O. Mole fraction of NaOH in solution and molality (in molkg-¹) of the solutions respectively are

71. A molal solution is one that contains one mole of a solute in (DPMT 1983: CPMT 1985: IIT JEE1986: MP PMT 1987: EAMCET 1990: MP PET 1994, 991

72. Which of the following modes of expressing concentration is independent of temperature [IIT JEE 1988; CBSE PMT 1992, 95; MP PMT 1992; AIIMS 1997, 2001; CPMT 1999; MP PET 2012]

73. The molality of 90% H₂SO₄ solution is[density=1.8 g/mL]

74. Molarity of H2SO4 is 18 M. Its density is 1.8 g/mL. Hence molality is[MP PMT 2009]

75. Calculate the molality of 1 litre solution of 93% H2SO4 (weight/volume). The density of the solution is 1.84 g/mL

76. Calculate the molality of a solution that contains 51.2 g of naphthalene, (C10H8 )in 500 mL of carbon tetrachloride. The density of CCl4, of 1.60 g/mL. [Kerala PET 2016]

77. A solution of Al 2(SO4 )3 (d = 1.253 gm / m L) contain 22% salt by weight. The molarity, normality and molality of the solution is[MP PET 2004]

78. The density of 3M solution of NaCl is 1.25 gL-¹. The molality of this solution is [AMU 2016]

80. 25mL of the given HCl solution requires 30mL of 0.1M sodium carbonate solution. What is the volume of this HCI solution required to titrate 30mL of 0.2M aqueous NaOH solution[JEE (Mains) 2019]

81. 50mL of 0.5M oxalic acid is needed to neutralize 25mL of sodium hydroxide solution. The amount of NaOH in 50mL of the given sodium hydroxide solution is:[JEE (Mains) 2019]