NDA/NA SOLVED PAPER 2016-I (GENERAL KNOWLEDGE)

Total Questions: 100

41. Which of the following statements in the context of northern hemisphere is/are correct?

1. Vernal equinox occurs on March 21.
2. Summer solstice occurs on December 22.
3. Autumnal equinox occurs on September 23.
4. Winter solstice occurs on June 21.

Select the correct answer using the code given below:

Correct Answer: (b) 1 and 3 only

42. A glass vessel is filled with water to the rim and a lid is fixed to it tightly. Then it is left inside a freezer for hours. What is expected to happen?

Correct Answer: (c) The glass vessel breaks due to expansion as water freezes to ice
Solution:When water freezes to ice its volume increases, so if it is kept in glass vessel in a freezer it may break the vessel.

43. A simple circuit contains a 12 V battery and a bulb having 24 ohm resistance. When you turn on the switch, the ammeter connected in the circuit would read

Correct Answer: (a) 0.5 A
Solution:= V/R = 12/24 = 0.5A

44. Three resistors with magnitudes 2, 4 and 8 ohm are connected in parallel. The equivalent resistance of the system would be

Correct Answer: (a) less than 2 ohm
Solution:1/R = 1/R₁ + 1/R₂ + 1/R₃
= 1/2 + 1/4 + 1/8 = 7/8 R = 8/7,
It is more than one and less than 2.

45. Suppose you have four test tubes labelled as 'A', 'B', 'C', and 'D'. 'A' contains plain water, 'B' contains solution of an alkali, 'C' contains solution of an acid, and 'D' contains solution of sodium chloride. Which one of these solutions will turn phenolphthalein solution pink?

Correct Answer: (b) Solution 'B'

46. Which one of the following oxides dissolves in water?

Correct Answer: (d) Na₂O
Solution:Oxides of Sodium readily dissolved in water as it has ionic bond which breaks in water easily other oxides have covalent bond which do not break easily.

47. To prevent heart problems, blood of a normal healthy person should have

1. low cholesterol level.
2. high HDL level.
3. high VLDL level.
4. high LDL level.

Select the correct answer using the code given below:

Correct Answer: (a) 1 and 2 only
Solution:Your blood lipids include the LDL and VLDL both are considered as bad cholesterol. HDL (good cholesterol; remember as "Healthy cholesterol") and triglycerides. The lower your LDL and the higher your HDL, the better your prognosis.

48. Spruce and Cedar are tree varieties of

Correct Answer: (b) Temperate coniferous forest
Solution:Spruce and Cedar are tree varieties of temperate coniferous forest.

49. 'Sal' tree is a

Correct Answer: (d) Moist deciduous tree
Solution:Dominant species of Moist deciduous tree are Teak and Sal.

50. Matter around us can exist in three different states, namely, solid, liquid and gas. The correct order of their compressibility is

Correct Answer: (b) Solid< Liquid < Gas
Solution:The atoms and molecules in gases are much more spread out than in solids or liquids. They vibrate and move freely at high speeds. A gas will fill any container, but if the container is not sealed, the gas will escape. Gas can be compressed much more easily than a liquid or solid.