General Knowledge (NDA/NA SOLVED PAPER 2023-I) (Part – B) (101 to 150)

Total Questions: 50

11. For manufacturing of glass, which among the following is used as a source of silica?

Correct Answer: (d) Sand
Solution:Glass is made from natural and abundant raw materials (sand, soda ash and limestone) that are melted at very high temperature to form a new material: glass.
At high temperature glass is structurally similar to liquids, however at ambient temperature it behaves like solids.
The source of silica during the process is generally sand.

12. Which among the following is the correct arrangement of halogens in the increasing order of their oxidizing nature?

Correct Answer: (d) I, Br, Cl, F
Solution:The increasing order of Oxidizing nature of halogens is,
Iodine<Bromine<Chlorine<Fluorine

13. Copper sulphate crystals available in the market are blue coloured crystals. By careful heating, they turn to white colour. Which one of the following is responsible for the blue colour?

Correct Answer: (c) Water
Solution:The most common form of copper sulphate is its pentahydrate, given by the chemical formula CuSO₄.5H₂O. It is a blue coloured chemical. When it is heated, the blue colour disappears and it turns white.
Heating removes the water of crystallization which is responsible for blue colour of the crystal. CuSO₄.5H₂O(Blue)---Heat → CuSO₄(White) + 5H₂O
After it cools, if a few drops of water are put into the test tube, the copper sulphate turns blue again as water of 1 crystallization make the copper sulphate hydrated again.

14. Equal volume of all gases, when measured at the same temperature and pressure, contain an equal number of particles. Who proposed the above law?

Correct Answer: (c) Avagadro
Solution:According to Avogadro's law, under the same conditions of temperature and pressure, equal volumes of different gases contain an equal number of molecules.

15. Airbags work on the principle of a chemical reaction triggered by the impact producing a gaseous product that causes a sudden volume change. Which one among the following chemical conversions is responsible for this?

Correct Answer: (a) Sodium azide into nitrogen gas
Solution:The chemical at the heart of the air bag reaction is called sodium azide (NaN3). High impact during crashes trip sensors in cars that send an electric signal to an ignitor.
The heat generated causes sodium azide to decompose into sodium metal and nitrogen gas, which inflates the car's air bags.

16. Which one among the following districts of Eastern India held a referendum in 1947 to decide whether or not to join Pakistan?

Correct Answer: (a) Sylhet
Solution:The 1947 Sylhet referendum was held in the Sylhet District of the Assam Province of British India to decide whether the district would remain in Undivided Undivided Assam and therefore within the post-independence Dominion of India, or leave Assam for East Bengal and consequently join the newly-created Dominion of Pakistan.

17. Which one of the following statements about Rabatak inscription is not correct?

Correct Answer: (c) The 23-line inscription is written in Gandhari language.
Solution:The Rabatak Inscription is a stone inscribed with text written in the Bactrian language and Greek script, found in 1993 at Rabatak, near Surkh Kotal in Afghanistan.
The inscription relates to the rule of the Kushan emperor Kanishka, and gives remarkable clues on the genealogy of the Kushan dynasty. It dates to the 2nd century CE.
The inscription includes 23 lines in Bactrian Language and a Greco- Bactrian script. The Bactrian Language is one of the Eastern Middle Iranian Languages. It was spoken by the people of northern part of Afghanistan.

18. Who among the following was the author of the famous Sanskrit work 'Mrichchhakatika"?

Correct Answer: (d) Shudraka
Solution:Mricchakatika is a ten-act Sanskrit drama attributed to Śūdraka, an ancient playwright who is possibly from the 5th century.
Rhizoids are unicellular or multicellular filamentous outgrowths that extend from the thallus of bryophytes like liverworts and mosses. Rhizoids are functionally similar to roots, though they are structurally different.

19. Yashovarman was ruler of which one of the following kingdoms?

Correct Answer: (a) Kannauj
Solution:Yashovarman was a medieval Indian ruler of Kannauj who founded the Varman dynasty of Kannauj.

20. Which one among the following rulers established Pataliputra as the capital of the Magadhan Empire?

Correct Answer: (c) Ajatashatru
Solution:Ajatshatru s credited to move his capital from Rajagriha to Pataliputra. Some historians also mentioned his Son Udayin who finally moved the capital to Patna and this status was maintained during the reign of the Mauryas and the later dynasties.