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

Total Questions: 100

31. A ray of light when refracted suffers change in velocity. In this context, which one among the following statements is correct?

Correct Answer: (c) Velocity decreases as the ray passes from a rarer to a denser medium
Solution:

32. An object placed 10 cm in front of a convex lens of focal length 15 cm. The image produced will be

Correct Answer: (b) Virtual and magnified
Solution:When the object is located between F and optical centre, the image produced is virtual and magnified.

33. Why is Graphite used in electrolytic cells ?

Correct Answer: (d) Graphite is a good conductor of electricity
Solution:Graphite contain free electrons in their structures and is thus a good conductor of electricity.

34. Washing Soda is the comon name for

Correct Answer: (c) Sodium Carbonate
Solution:Sodium carbonate is also known as washing soda, soda ash and soda crystals.

35. Which one of the following Indian states has the highest proportion of area under forest cover ?

Correct Answer: (d) Mizoram
Solution:In terms of percentage of forest cover with respect to total geographical area, Mizoram with 90.38 percent had the highest forest cover in terms of percentage of forest cover to Geographical area.

36. Match List I with List II and select the correct answer using the code given below the Lists :

List-I (National Park/Wildlife Sanctuary)List-II (State)
A. Chandra Prabha1. Uttarakhand
B. Silent Valley2. Chhattisgarh
C. Valley of flowers3. Uttar Pradesh
D. Indravati4. Kerala
Code:ABCD
(a)2143
(b)3412
(c)2413
(d)3142
Correct Answer: (b)
Solution:The Chandra Prabha Wildlife Sanctuary is situated in the eastern region of Uttar Pradesh. Silent Valley National Park is in Kerala. Valley of flowers is in Uttarakhand. Indravati National Park is the finest and most famous wildlife parks of Chhattisgarh.

37. To a perpendicular to the plane of ecliptic, Earth's axis of rotation makes an angle of 23½ degrees. Had this angle been zero degree, which one among the following would result?

Correct Answer: (a) There would have been no season
Solution:In astronomy, axial tilt (also called obliquity) is the angle between an object's rotational axis and the perpendicular to its Orbital plane, both oriented by the right hand rule. At an obliquity of 0°, these lines point in the same direction i.e. the rotational axis is perpendicular to the orbital plane. Axial tilt differs from inclination. Over the course of an orbit, the angle of the axial tilt does not change, and the orientation of the axis remains the same relative to the background stars. This causes one pole to be directed toward the Sun on one side of the orbit, and the other pole on the other side, the cause of the seasons on the Earth.

38. Gametophytes of sexually reproducing flowering plants are

Correct Answer: (a) Haploid
Solution:The gametophyte is the multi-cellular structure (plant) that is haploid, containing a single set of chromosomes in each cell. The gametophyte produces male or female gametes (or both) by a process of cell division called mitosis.

39. The seeds of flowering plants are made up of

Correct Answer: (b) Embryo, food reserves and coat
Solution:Seeds are the package of food. It contains embryo and is covered with a coat.

40. A person stands on his two feet over a surface and experiences a pressure P. Now the person stands on only one foot. He would experience a pressure of magnitude

Correct Answer: (d) 2P
Solution:Pressure, P=F/A; P' = F/A/2 = 2F/A; P' = 2P