4071: A chair is tilted about two of its legs and then left. It would return to its original position if:
(a) Its centre of gravity falls outside the base.
(b) Its centre of gravity falls within the base.
(c) It is tilted through an angle of 60°.
(d) It will never regain its original position.
4072: In the context of mitigating the impending global warming due to anthropogenic emissions of carbon dioxide, which of the following can be the potential sites for carbon sequestration?
1. Abandoned and uneconomic coal seams
2. Depleted oil and gas reservoirs
3. Subterranean deep saline formations
Select the correct answer using the code given below:
(a) 1 and 2 only
(b) 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
4073: The term 'IndARC', sometimes seen in the news, is the name of
(a) an indigenously developed radar system inducted into Indian Defence
(b) India's satellite to provide services to the countries of Indian Ocean Rim
(c) a scientific establishment set up by India in Antarctic region
(d) Indias underwater observatory to scientifically study the Arctic region
4074: The first among the following to establish trade links with India were:
(a) Dutch
(b) French
(c) Portuguese
(d) English
4075: At a certain place, the Greenwich Mean Time is ahead by 12 hours. The place is located:
(a) 180°W of GMT
(b) 180°E of GMT
(c) 90°W of GMT
(d) 90°E of GMT