Part – B (General Studies) NDA/NA SOLVED PAPER 2018 (II) (101 to 150)

Total Questions: 50

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

Correct Answer: (b)
Solution:

The Port of Kolkata is a riverine port in the city of Kolkata. It is the oldest operating port and was constructed by the British East India Company.
Mormugao is main port of Goa. It is a natural port and on the entrance of the estuary. Visakhapatnam Port is the deepest land-locked and protected port of India. It is located in Andhra Pradesh. It is India's second largest port by volume of cargo handled.
Paradip Port is a natural, deep-water, and deltaic port of India in Odisha. It is situated at confluence of the Mahanadi River and the Bay of Bengal.

2. Which one of the following is not an agent of metamorphism?

Correct Answer: (c) Decomposition
Solution:

The literary meaning of metamorphism is to change form. The agents of metamorphism include heat, pressure (stress, compression), and chemically active like fluids, solution, etc. During metamorphism, rocks are often subjected to all three metamorphic agents simultaneously. However, the degree of metamorphism and the contribution of each agent vary greatly from one environment to another

3. The solution of which one of the following will have pH less than 7?

Correct Answer: (c) FeCl₃
Solution:

FeCl₃ is a salt of strong acid (HCl) and weak base Fe(OH)₃ . As a result FeCl₃ is an acidic salt and hence in solution form its pH lies below 7.

4. Which one of the following is an oxidation-reduction reaction?

Correct Answer: (c) 2Mg + O₂ → 2MgO
Solution:

5. Which one of the following is not used as fertilizer?

Correct Answer: (b) Ammonium sulphide
Solution:

Ammonium sulphide is not used as fertilizer. Rest of the given compounds are used as fertilizers to compensate the deficiency of nitrogen, phosphorus and sulphur in the soil.

6. Which one of the following is the chemical formula of gypsum?

Correct Answer: (a) CaSO₄·2H₂O
Solution:

7. Which one of the following statements about the law of conservation of mass is correct?

Correct Answer: (c) Matter can neither be created nor destroyed.
Solution:

Law of conservation of mass states that matter can neither be created nor be destroyed.

8. The wavelength of X-rays is of the order of:

Correct Answer: (a) 1 Å
Solution:

X-Ray is an electromagnetic wave which is discovered by German professor Rontgen.
The wavelength of X-rays is of the order of 1 Å. It is used in surgery to detect the fracture, diseased organs, stones in the body.

9. Consider the following velocity and time graph:

Which one of the following is the value of average acceleration from 8sec to 12sec?

Correct Answer: (d) −1m/sec²
Solution:

10. If the focal length of a convex lens is 50 cm, which one of the following is its power?

Correct Answer: (a) +2 dioptre
Solution: