Solved Paper Laboratory Assistant 2019 [Part-1] – HPSSC Hamirpur

By | September 26, 2019

Post Code: 690

Series: B

1. Which does not belong to the first transition series?

  1. Fe
  2. V
  3. Ag
  4. Cu

2. In the compound, lithium tetrahydroaluminate, the ligand is

  1. H+
  2. H
  3. H-
  4. None of these

3. K4 [Fe (CN)6] is

  1. Double salt
  2. Complex compound
  3. Natural molecule
  4. None of these

4. The IUPAC name of the compound CH2 = CH-CH(CH3)2 IS

  1. 1, 1- DIMETHYLPROP -2 – ENE
  2. 3 – METHYLBUT – 1 – ENE
  3. 2 – VINYLPROPANE
  4. 1- ISOPROPYLETHYLENE

5. Ethyl bromide reacts with silver nitrite to form

  1. Nitroethane
  2. Ethane
  3. Ethyl nitrite
  4. Both A and C

6. Bromination of trans but -2 ene leads to the formation of

  1. D form
  2. l form
  3. meso compound
  4. both d and l forms

7. Salicylaldehyde can be prepared from phenol by

  1. schotten- Baumann reaction
  2. kolbe’s reaction
  3. perkin reaction
  4. reamer Tiemann reaction

8. Which is the strongest acid?

  1. CH=CH
  2. C6 H6
  3. C2 H6
  4. CH3 OH

9. No. of acyclic isomers of the compound having the molecular formula C4 H10 O

  1. 4
  2. 5
  3. 6
  4. 7

10. Which will not give formaldehyde on heating or upon distillation?

  1. Formalin
  2. Trioxane
  3. Paraldehyde
  4. None of these

11. A new carbon-carbon bond formation is possible in

  1. Cannizaro’s reaction
  2. Friedal Craft’s reaction
  3. Reamer-Tiemann reaction
  4. Both a and b

12. Which has the maximum acid strength?

  1. O-Nitrobenzoic acid
  2. M-Nitrobenzoic acid
  3. P-Nitrobenzoic acid
  4. P-Nitrophenol

13. Which of the following compounds is most basic?

  1. Aniline
  2. Cyclohexylamine
  3. O-Nitroaniline
  4. P-Methoxyaniline

14. Thymine is

  1. 5- methyluracil
  2. 4- methyluracil
  3. 3- methyluracil
  4. 1- methyluracil

15. Glucose does not react with

  1. Hydroxylamine
  2. HNO3
  3. Acetic anhydride
  4. Sodium bisulphate

16. Which is not a condensation polymer?

  1. Melamine
  2. Glyptal
  3. Dacraon
  4. Neoprene

17. Which of the following is a polyamide?

  1. Teflon
  2. Nylon-66
  3. Terylene
  4. Baklite

18. 2 percent solution of phenol is

  1. Antiseptic
  2. Disinfectant
  3. Antibiotic
  4. Antiallergic

19. Which of the following principles is being used in SONAR technology?

  1. Laws of thermodynamics
  2. Reflection of electromagnetic waves
  3. Newton’s law of motion
  4. Reflection of ultrasonic waves

20. 1 fermi is equal to

  1. Energy
  2. Coefficient of viscosity
  3. Pressure
  4. Force

21. Pascal-second has the dimensions of

  1. Energy
  2. Coefficient of viscosity
  3. Pressure
  4. Force

22. If resultant of two vectors of equal magnitude is equal to the magnitude of either vector, then the angle between two vectors is

  1. 30°
  2. 60°
  3. 90°
  4. 180°

23. The angle between two equal vectors is

  1. 60°
  2. 90°
  3. 180°

24. When train suddenly stops, the passengers fall forward. It is due to

  1. Intertia of motion
  2. Inertia of direction
  3. Gravitational pull by the earth
  4. None of these

25. The direction of the force of friction is

  1. Perpendicular to the motion of a body
  2. Along the direction of motion of a body
  3. Opposite to the direction of motion of a body
  4. None of these

26. Impulse is

  1. Force
  2. A scalar quantity
  3. Equal to change in momentum of a body
  4. Equal to the rate of change of momentum of body

27. A force of 49 N is just able to move a black of wood of mass 10 kg on a rough horizontal surface. The coefficient of friction is

  1. Zero
  2. 5
  3. 7
  4. 0

28. When the velocity is doubled, the banking angle should be

  1. ½
  2. ¼
  3. 4 time
  4. 8 time

29. The area under force-displacement graph is equal to

  1. Impulse
  2. Momentum
  3. Work done
  4. None of these

30. The slope of the kinetic energy versus position vector gives the rate of change of

  1. Work
  2. Force
  3. Velocity
  4. Momentum

31. A force 10 N is applied on a body for 3 seconds and the corresponding displacement is 6 m. the power of the source is

  1. 20 W
  2. 30 W
  3. 40 W
  4. 50 W

32. The moment of inertia of a body does not depend upon its

  1. Different orientations of axis
  2. Nature of distribution of mass
  3. Angular velocity
  4. Axis of rotation

33. The reduced mass of two particles having masses m and 2 m is

  1. 2m
  2. 3m
  3. 2m/3
  4. m/2

34. An earth satellite is moving around the earth in a circular orbit. In such a case, which of the following is conserved?

  1. Velocity
  2. Linear momentum
  3. Angular momentum
  4. None of these

35. The value of gravity ‘g’ on a planet

  1. Depends on its mass
  2. Depends on its size
  3. Depends on the mass of a body on the planet
  4. Both a and b

36. The angle between the equatorial plane and the orbital plane of a polar satellite is

  1. 90°
  2. 120°
  3. 180°

37. Elastic limit is equal to

  1. Stress
  2. Strain
  3. Young’s modulus
  4. Modulus of rigidity

38. Which is not the unit of pressure?

  1. Pascal
  2. Nm-2
  3. Torr
  4. N

39. Equation of continuity expresses the law of conservation of

  1. Mass
  2. Momentum
  3. Energy
  4. None of these

40. The angle of contact between glass and mercury is 140°. The shape of meniscus of mercury in a tube of glass is

  1. Concave upward
  2. Plane
  3. Convex upward
  4. None of these

41. S.I. unit of the temperature gradient is

  1. Km
  2. Km-1
  3. K-1 m
  4. K-1 m-1

42. The angle of contact of a liquid with a solid depends on

  1. Liquid only
  2. Solid only
  3. Both on solid and liquid
  4. None of these

43. The internal energy of an isolated system

  1. Increases
  2. Decreases
  3. Remains the same
  4. None of these

44. For an ideal gas

  1. CP < CV
  2. CP = CV
  3. CP > CV
  4. CP =C = 0

45. The average kinetic energy of a molecule of a gas is directly proportional to the

  1. Pressure of the gas
  2. Volume of the gas
  3. Temperature of the gas
  4. Mass of the gas

46. Absolute zero is considered at which

  1. Gas becomes liquid
  2. Molecular energy is zero
  3. Random motion of molecular occurs
  4. All molecular motion ceases

47. Which of the following cannot be in the same direction for a simple harmonic oscillation?

  1. Position and velocity
  2. Position and acceleration
  3. Velocity and Acceleration
  4. None of these

48. The temperature at which speed of und in air becomes double of its value at 27°C is

  1. 54 °C
  2. 327 °C
  3. 927 °C
  4. 1000 °C

49. How many times more intense is a 60 dB sound than a 30 dB sound?

  1. 2
  2. 4
  3. 100
  4. 1000

50. On moving a charge of 20 C, by 2 cm, 2j of work is done. Then, the potential difference between the points is

  1. 1 V
  2. 8 V
  3. 2 V
  4. 5 V

51. The work done in placing a charge of 8 * 10-18 coulomb on a capacitor of capacity 100 microfarad is

  1. 16* 10 -32joule
  2. 1 * 10-26 joule
  3. 4*10-10 joule
  4. 32 * 10-32 joule

52. In a charged capacitor, the energy resides

  1. On the positive plate
  2. In the field between the plates
  3. Around the edge of the capacitor plates
  4. None of these

53. If one penetrates a uniformly charged sphere, the electric field strength

  1. increase
  2. decreases
  3. remains the same as at the surface
  4. in zero at all points

54. If a long hollow copper pipe carries a current, the magnetic field produced will be

  1. inside the pipe only
  2. outside the pipe only
  3. neither inside nor outside the pipe
  4. both inside and outside the pipe

55. To convert a galvanometer into a voltmeter

  1. a high resistance is connected in parallel
  2. a low resistance is connected in series
  3. a low resistance is connected in parallel
  4. a high resistance is connected in series

Read the next part:Part-2 ॥ Part-3॥

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