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Chemistry

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

a. 0.1 b. 40 c. 1.0 d. 0.4 Ans. c (12)

40. The amount of

K2 Cr2 O7 required to prepare 100 mL of its 0.05 N solution is a. 2. 9424 g b. 0.4904...

39. The volumes of 4 N HCl and 10 N HCl required to make 1 litre of 6 N HCl are

a. 0.75 litre of 10 N HCl  and 0.25 litre of 4 N HCl b. 0.25 litre of 4 N...

30. If 500 mL of a 5 M solution is diluted to 1500 mL, what will be the molarity of the solution obtained

a. 1.5 M b. 1.66 M c. 0.017 M d. 1.59 M Ans. b (9)

38. The concentration of

H2  O2  solution of ’10 volume’ is a. 30% b. 3% c. 1% d. 10% Ans. b (7)

37. A certain aqueous solution of

FeCl3   (formula mass = 162 )  has a density of 1.1 g/mL and contains 20.o% FeCl3 . Molar concentration of this...

36. Equal volumes of molar hydrochloric acid and sulphuric acid are neutralised by dilute NaOH solution and xkcal and ykcal of heat are liberated respectively. Which of the following is true

a.  x= y b. x = 2y c. x = 2y d. None of the above Ans. b (21)

35. 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

a. 0.01 M b. 0.10 M c. 0.001 M d. 0.0001 M Ans. b Explanation : Molarity is intrinsic property....

34. How many grams of concentrated nitric acid solution 70%

HNO3  should be used to prepare 250mL of 2.0 M HNO3 a. 53. 0 g conc. HNO3 b. 45.0 g...

33. In an experiment it showed that 10 mL of 0.05 M solution of chloride required 10mL of 0.1 M solution of

AgNO3   which of the following will be formula of the chloride (X stands for the symbol of the element other...

32. The density of a 3.60 M sulphuric acid solution that is 29%

H2 SO4  (Molar mass = 98 g mol -1   ) by mass will be a. 1.64 b. 1.88 c. 1.22 d....

31. If the concentration of glucose in blood is

0.9 g L-1  , what will be the molarity of glucose in blood a. 5 M b. 50 M c....

29. The molarity of pure water is

a. 55.6 b. 5.56 c. 100 d. 20.08 Ans. a Explanation : molarity of pure water = 1000/18 = 55.6...

28. What is molarity of a solution of HCl which contains 49% by weight of solute and whose specific gravity is 1.41

a. 15.25 b. 16.75 c. 18.92 d. 20.08 Ans. c (46)

27. Concentration aqueous solution sulphuric acid 98%

H2  SO4  by mass and has a density of 1.80 g.mL-1 . Volume of acid  required to make 1 litre...

26. The density of a 3M sodium thiosulphate solution is 1.25 g.mL. Calculate the precent by weight of sodium thiosulphate

a. 12. 64 % b. 37. 92% c. 0.87% d. 63.21% Ans. b (10)

25. Which of the following should be done in order to prepare 0.40M NaCl starting with 100 mL of 0.30 M NaCl

a.  Add 0.585 g NaCl b. Add 20 mL water c. Add 0.010 mL NaCl d. Evaporate 10 mC water...

24. 3.0 molal NaOH solution has a density of 1.110 g/mL. The molarity of the solution is

a.  3.0504 b. 3.64 c. 3.o5 d. 2. 9732 Ans. d (8)

23. 25mL of a solution of barium hydroxide on titration with a 0.1 molar solution of hydrochloric acid gave a titre value of 35 mL. The molarity of the solution is

a.  0.07 b. 0. 14 c. 0. 28 d. 0.35 Ans. a (9)

22. Which statement is true for solution of 0.020

M H2  SO4 a. 2 litre of the solution contains 0.020 mole of SO42-  b. 2 litre of the solution...

21. If 5.85 g of NaCl is dissolved in water and the solution is made up to 0.5 litre, the molarity of the solution will be

a. 0.2 b. 0.4 c. 1.0 d. 0.1 Ans.a (15)

20. 20mL of HCl solution requires 19.85 mL of 0.01 M NaOH solution for complete neutralization. The molarity of HCl solution is

a. 0.0099 b. 0.099 c. 0.99 d. 9.9 Ans. a (53)

19. 8.50 g of

NH3  is present in 250 mL volume. Its active mass is  a. 1.0 mL-1 b. 0.5 mL-1 c. 1.5  mL-1...

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

a.  100 g b. 180 g c. 18 g d. 1.8 g Ans. a Explanation : 1og. of glucose is...

17. In which ration of volumes 0.4 M HCl and 0.9 N=M HCl are to be mixed such that the concentration of the resultant solution becomes 0.7 M

a.  4:9 b.  2:3 c. 3:2 d. 1:1 Ans. b (10)

16. Dissolving 120 g of urea in 1000g of water gave a solution of density 1.15g/mL. The molarity of the solution is

a. 1.78 M b. 2.00 M c. 2.05 M d. 2.22 M Ans. c (11)

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

a. 0.8 M b. 0.6 M c. 0.4 M d. 0.2 M Ans. b (11)

14. For converting a solution if 100 mL KCl of 0.4 M concenrtration into a solution of KCl o.05 M concentration. The quantity of water added is

a. 900 mL b. 700 mL c. 500 mL d. 300 mL Ans. b (53)

13. What is the molarity of

H2 SO4   solution that has a density 1.84 g/cc at 35° C and contains solute 98% by weight a. 4.18 M...

12. 40% by weight solution will contain how much mass of the solute in 1 L solution, density of the soltution is 1.2g/mL

a. 480 g b. 48 g c. 38 g d. 380 g Ans. a (8)

11. 6.02 x

10 20   molecules of urea are present in 100 mL of its solution. The concetration of urea solution is a. o.02...

10. The concentration of an aqueous solution of 0.01M

CH3 OH solution is very nearly equal to which of the following . a. 0.01% CH3 OH b.0.01m CH3 OH c .xCH3 OH  = 0.01...

9. An aqueous solution of glucose is 10% in strength. The volume in which 1 g mole of it is dissolved will be

a. 18 litre b.9 litre c. 0.9 litre d. 1.8 litre Answer. D (10)

8. The molarity of a solution of

Na2 CO3  having 10.6g/500mL of solution is a. 0.2M b. 2M c.20M d. 0.02 M Ans. a (13)

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

a. Molarity b. Molality c. Mole fraction d. Weight fraction Ans. a (13)

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 a. 1.8 b. 0.8 c. 0.18 d....

5. 10. 6 grams of a substance of molecular weight 106 was dissolved in 100 mL. 10mL of this solution was pipetted out into a 1000mL flask and macle up to the mark with distilled water. The molarity of the resulting solution is

a.  1.0 M b. 10-2 M c. 10-3 M d. 10 -4  M Ans. b (4)

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

a. 1.20 M b. 1.50M c. 1.344 M d. 2.70 M Ans. c (19)

3. The Molarity of a solution made by mixing 50mL of conc.

H2 SO4 (36N) with 50mL of water is a. 36M b. 18M c. 9M d. 6M Ans. c Explanation :...

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

a. 0.5 b. 1.0 c. 2.0 d. 0.1 Ans. a (9)
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