General Knowledge Part -B: English (NDA/NA SOLVED PAPER 2022-I) (51 to 100)

Total Questions: 50

41. Which one of the following reactions is an example of decomposition reaction?

Correct Answer: (b)
Solution:A decomposition reaction is a chemical reaction in which one reactant breaks two from two or more products. Decomposition reactions require energy. There are mainly three types of decomposition reactions: Thermal decomposition reactions; Elctrolytic decomposition reactions; Photo decomposition reactions.
Reaction (b) is an example of photodecomposition reaction.

42. Which one of the following is the mechanism of action of oral contraceptive pills?

Correct Answer: (d) They inhibit the release of egg.
Solution:The mechanism of action of hormonal contraception includes: Inhibition of ovulation(inhibits the relase of egg).

43. Which one of the following plants has unisexual flowers?

Correct Answer: (a) Papaya
Solution:Papaya has unisexual flowers, male flowers, and female flowers are on separate plants.

44. A cell is unable to synthesize lipids. Which of its cell organelles might be defective?

Correct Answer: (a) Smooth endoplasmic reticulum
Solution:Smooth endoplasmic reticulum is involved in lipid synthesis.

45. All objects experience a buoyancy when they are immersed in a fluid. Buoyancy is

Correct Answer: (c) an upward force
Solution:Buoyancy is an upward force which acts on an object immersed in liquid. Its value is equal to weight of liquid displaced by object.

46. According to Fleming's right-hand rule, if the forefinger indicates the direction of magnetic field and thumb shows the direction of motion of conductor, then the stretched middle finger will predict the direction of

Correct Answer: (c) induced current
Solution:The middle finger represent direction of induced current.

47. Two resistors R₁ and R₂ arranged in parallel combination in an electrical closed circuit are made of the same material and of same thickness. If the length of R₂ is twice the length of R₁ then the total resistance R satisfies

Correct Answer: (a) 3R = 2R₁
Solution:

48. What is the magnification produced by a concave lens of foacl length 10 cm, when an image is formed at a distance of 5 cm from the lens?

Correct Answer: (c) 0.5
Solution:

49. A wooden box of mass 2 kg and dimensions (30 cm × 15 cm x 10 cm) is placed on a table with sides 30 cm and 10 cm touching the tabletop. Which one of the following is the approximate pressure exerted on the table?

Correct Answer: (d) 666.6 N/m²
Solution:

50. Why are the tyres of aircrafts made of conducting rubber?

1. So that the charge accumulated on the aircraft in flight, by rubbing the air, can easily be transferred to ground tuon landing.imam tua griwallat stig daily
2. So that the charge accumulated due to the operation of various electronic equipments in the aircraft in flight can easily be transferred to ground on landing.
Select the correct answer using the code given below.

Correct Answer: (a) 1 only
Solution:During take of for landing the type of aircrafts get charged due to friction between types and ground. It types are slightly conducting, the charges developed on the tyres will not stay one them and find its way to earth.