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2022

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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...

8. An elastic material of Young’s modulus Y is subjected to a stress S. The elastic energy stored per unit volume of the material is

(a)   2Y/S2                                     ...

7.A particle of mass m is under the influence of a force F which varies with the displacement x according to the relation

A particle of mass m is under the influence of a force F which varies with the displacement x according...

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)

29. Mercury does not wet glass, wood or iron because

(a)  Cohesive force is less than adhesive force (b)  Cohesive force is greater than adhesive force (c)   Angle of contact...

6. There are two wires of same material and same length while the diameter of second wire is 2 times the diameter of first wire, then ratio of extension produced in the wires by applying same load will be

(a)   1 : 1                                         (b)   2 : 1 (c)   1 : 2                                         (d)   4 : 1 Answer-d (5)

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...

5. One end of a uniform wire of length L and of weight W is attached rigidly to a point in the roof and a weight is suspended from its lower end. If S is the area of cross-section of the wire, the stress in the wire at a height 3L/4 from its lower end is

(a)   W1/S                                     ...

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)

4. The extension in a string obeying Hooke’s law is x. The speed of sound in the stretched string is v. If the extension in the string is increased to 1.5x, the speed of sound will be

(a)       1.22 v                                              (b)   0.61 v (c)   1.50 v                       ...

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...

3. Two rods of different materials having coefficients of linear expansion

3. Two rods of different materials having coefficients of linear expansion α1,α2 and Young’s moduli  Y1 and Y2 respectively are...

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)

31. When a drop of water is dropped on oil surface, then

(a)  It will mix up with oil (b)  It spreads in the form of a film (c)   It will deform...

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 (52)

2. To break a wire, a force of

2. To break a wire, a force of 106 N/m2 is required. If the density of the material is 3×103...

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...

30. Surface tension of a liquid is found to be influenced by

(a)  It increases with the increase of temperature (b)  Nature of the liquid in contact (c)   Presence of soap that...

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)

1. An Indian rubber cord L metre long and area of cross-section

An Indian rubber cord L metre long and area of cross-section A metre 2  is suspended vertically. Density of rubber is...

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...

28. If a glass rod is dipped in mercury and withdrawn out, the mercury does not wet the rod because

(a)  Angle of contact is acute (b)  Cohesion force is more (c)   Adhesion force is more (d)  Density of mercury...

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...

27. At which of the following temperatures, the value of surface tension of water is minimum

(a) 4o C (b)  25o C (c)   50o C (d)  75o C Ans. d (10)

30. Wires A and B are made from the same material. A has twice the diameter and three times the length of B. If the elastic limits are not reached, when each is stretched by the same tension, the ratio of energy stored in A to that in B is

(a)  2 : 3                                         (b)   3 : 4 (c)  3 : 2                                         (d)   6 : 1 Answer-b (14)

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)

29. A wire suspended vertically from one of its ends is stretched by attaching a weight of 200 N to the lower end. The weight stretches the wire by 1 mm Then the elastic energy stored in the wire is

(a)   0.1 J                                         (b)   0.2 J (c)   10 J                                          (d)   20 Answer-a (15)

26. Consider a liquid contained in a vessel. The liquid solid adhesive force is very weak as compared to the cohesive force in the liquid. The shape of the liquid surface near the solid shall be

(a)  Horizontal (b)  Almost vertical (c)     Concave (d)     Convex Ans. d (6)

28. Which of the following is true for elastic potential energy density

(a)   Energy density =(1/2)×strain×stress (b)   Energy density =(strain) 2 × volume (c)   Energy density = (strain)× volume (d)   Energy density =...

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)

25. The maximum force, in addition to the weight required to

The maximum force, in addition to the weight required to pull a wire of 5.0 cm long from the surface...

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)

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