441: In terms of economy, the visit by foreign nationals to witness the XIX Common Wealth Games in India amounted to
(a) Imports
(b) Exports
(c) Consumption
(d) Production
442: Electrically charged particles from space travelling at speeds of several hundred km/sec can severely harm living beings if they reach the surface of the Earth. What prevents them from reaching the surface of the Earth?
(a) The Earth's magnetic field diverts them towards its poles
(b) Ozone layer around the Earth reflects them back to outer space
(c) Moisture in the upper layers of atmosphere prevents them from reaching the surface of the Earth
(d) None of the statements (a), (b) and (c) given above is correct
443: Which one of the following lakes forms an international boundary between Tanzania and Uganda ?
(a) Chad
(b) Malawi
(c) Victoria
(d) Zambezi
444: With reference to 'fuel cells' in which hydrogen-rich fuel and oxygen are used to generate electricity. Consider the following statements :
1. If pure hydrogen is used as a fuel, the fuel cell emits heat and water as by-products.
2. Fuel cells can be used for powering buildings and not for small devices like laptop computers.
3. Fuel cells produce electricity in the form of Alternating Current (AC).
Which of the statements given above is / are correct?
(a) 1 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
445: In the middle of the year 2008 the Parliament of which one of the following countries became the first in the world to enact a Climate Act by passing "The Climate Change Accountability Bill"?
(a) Germany
(b) Canada
(c) Australia
(d) Japan