NDA/NA SOLVED PAPER 2015-II (GENERAL KNOWLEDGE)

Total Questions: 100

41. Which of the following are the properties of an electron?

1. Electron is a constituent of cathode ray
2. Electron is a negatively charged particle
3. The mass of the electron is equal to the mass of the proton
4. Electron is deflected by the electric field but not by magnetic field

Select the correct answer using the code given below:

Correct Answer: (a) 1 and 2 only

42. Carbon and energy requirements of autotrophic organisms are fulfilled by:

Correct Answer: (a) Photosynthesis

43. The resistance of a wire of length / and area of cross-section a is x ohm. If the wire is stretched to double its length, its resistance would become:

Correct Answer: (c) 4 x ohm

44. Which one of the following describes the Lithosphere?

Correct Answer: (b) Crust and upper mantle

45. Which of the following statements regarding heavy water are correct?

1. It is extensively used as a moderator in nuclear reactors
2. It cannot be used in exchange reaction to study reaction mechanism
3. Viscosity of heavy water is relatively smaller than that of ordinary water
4. The dielectric constant of heavy water is smaller than that of ordinary water

Select the correct answer using the code given below:

Correct Answer: (d) 1 and 4

46. Conservation of momentum in a collision between particles can be understood on the basis of:

Correct Answer: (c) Both Newton's second law of motion and Newton's third law of motion

47. Which one of the following statements is not correct?

Correct Answer: (b) Temperatures in equatorial regions change substantially from January to July

48. To weld metals together, high temperature is required. Such a high temperature is obtained by burning:

Correct Answer: (a) Acetylene in oxygen

49. Two forces, one of 3 newton and another of 4 newton are applied on a standard 1 kg body, placed on a horizontal and frictionless surface, simultaneously along the x-axis and the y-axis, respectively, as shown below:


The magnitude of the resultant acceleration is :

Correct Answer: (c) 5m/s²

50. Magnetic meridian is an imaginary:

Correct Answer: (c) vertical plane