General Knowledge (NDA/NA SOLVED PAPER 2023) (101 to 150)

Total Questions: 50

11. The motion of a particle of mass m is described by the relation, y = ut × 1/2 + gt², where u is the initial velocity of the particle. The force acting on the particle is

Correct Answer: (d)
Solution:(d)

12. Read the question below and answer it :

Correct Answer: (a)
Solution:(a)

13. Which one of the following metals can be extracted using carbon as reducing agent?

Correct Answer: (a) Zinc
Solution:Metals which are less reactive than carbon can be extracted using carbon as reducing agent. Metal reduced by carbon reduction are zinc, Iron, Tin, Lead. Aluminum is more reactive than carbon so carbon cannot reduce it. Sliver and Gold are reduced by Mac Arthur process.

14. Which among the following is NOT true with respect to colloidal solution?

Correct Answer: (b) Colloidal solution is homogenous in nature
Solution:It is a heterogeneous mixture which consist of two phases, the dispersed phase as well as the dispersion medium. The size of colloidal particles is very small. Their particle size ranges between 1-1000 nanometers.

15. Kerosene and petrol mixture can be best separated by

Correct Answer: (c) Fractional distillation
Solution:Two miscible liquids having difference in boiling point like kerosene and peyrol can be separated by the process of fractional distillation. Petrol having lower boiling point evaporates leaving behind kerosene.

16. As proposed by Dalton, which of the following symbol represents phosphorus?

Correct Answer: (d)
Solution:(d)

17. Which among the following statenients with respect to carbon is/are correct?

1. Carbon forms the basis for all living organisms and many things we use
2. Carbon shows tetra-valency and the property of catenation
3. Carbon forms covalent bonds with itself and other elements
4. Carbon forms compounds containing triple and tetra bonds between carbon atoms
Select the correct answer using the code given below :

Correct Answer: (c) 1, 2 and 3
Solution:Carbon can form single, double and triple bond between carbon atoms but cannot form tetra bonds between carbon atoms. It is tetravalent which means it can form 4 bonds with different atoms.

18. Consider the following statements:

1. Terracotta models of the plough have been found at sites in Cholistan and at Banawali (Haryana).

2. There is evidence of a ploughed field at Kalibangan associated with the mature phase of the Harappan civilization.

3. The ploughed field at Kalibangan had two sets of furrows crossing at right angles to each other suggesting two different crops were grown together in it.

Which of the statements given above are correct?

Correct Answer: (c) 1 and 3 only
Solution:The official answer key states option (c), but all three statements are correct; therefore, option (a) is the correct answer.

19. Which of the following statements about the technological innovations during the Industrial Revolutions are correct?

1. Mule was the nickname for a machine invented in 1779, that allowed the spinning of strong and fine yarn.t

2. Water Frame, invented in 1769 by Richard Arkwright, made it possible to weave pure cotton clothes.

3. Power loom, invented by Edmund Cartwright in 1787, could be used to weave any kind of materials.

Select the correct answer using the code given below:

Correct Answer: (b) 1, 2 and 3
Solution:The official answer key states option (b), but statement 3 is incorrect; therefore, option (a) is correct.
Edmund cartwrightl invented the power loom which was firstly was designed in 1784 and built in 1785. It was one of the key developments in the industrialization which made it easier to weave any kind of materials.

20. Who among the following is known as the architect of Indian planning?

Correct Answer: (c) P.C. Mahalanobis
Solution:P.C.Mahalanobisis known as the Architect of Indian Planning and considered as the father of modern statistics in India and founder of the Indian Statistical Institute. Second five year plan was based on mahalanobis model.