Petrol, diesel, and kerosene are all refined forms of crude oil (petroleum). Petroleum is a non-renewable fossil fuel that takes millions of years to form, meaning finite global reserves will eventually run out.
12. Malaria spreads through:
(A) Mosquito
(B) Bacteria
(C) Virus
(D) None
Answer:
(A) Mosquito
Explanation:
Malaria is transmitted exclusively by the bite of infected female Anopheles mosquitoes, which pass the Plasmodium parasite into the human bloodstream.
13. Dandi March is associated with:
(A) Mahatma Gandhi
(B) S. C. Bose
(C) J. L. Nehru
(D) None of these
Answer:
(A) Mahatma Gandhi
Explanation:
The Dandi March (or Salt March) was a major nonviolent civil disobedience movement led by Mahatma Gandhi in 1930 to protest the British salt monopoly.
14. Dead Sea is known as:
(A) Soft Water
(B) Hard Water
(C) Heavy Water
(D) Salty Water
Answer:
(D) Salty Water
Explanation:
The Dead Sea is a hypersaline lake famous for its incredibly high salt concentration (nearly ten times that of regular ocean water), making it intensely salty.
15. We get water from:
(A) Hand pump
(B) Tube well
(C) Canal
(D) All of these
Answer:
(D) All of these
Explanation:
Hand pumps, tube wells (groundwater extraction), and canals (surface water diversion) are all major, viable sources of freshwater for human and agricultural use.
