1. When Leander Paes won the "mixed doubles" at the US Open in the year 2008, who of the following was his partner? [2009]

2. Which one of the following layers of the atmosphere is responsible for the deflection of radio waves? [1996]

3. Consider the following statements: [2000]
1. Tides are of great help in navigation and fishing.
2. High tide enables big ships to enter or leave the harbour safely
3. Tide prevents siltation in the harbours
4. Kandla and Diamond Harbour are tidal ports
Which of these statements are correct?

4. Consider the following statements: [2002]
1. Ocean currents are the slow-surface movement of water in the same
2 Ocean currents assist in maintaining the Earth's heat balance
3. Ocean currents are set in motion primarily by prevailing winds
4. Ocean currents are affected by the configuration of the ocean
Which of these statements are correct?

5. The group of small pieces of rock revolving round the sun between the orbits of Mars and Jupiter are called: [1997]

6. Consider the following statements made about the sedimentary rocks: [2001]
1. Sedimentary rocks are formed at earth's surface by the hydrological system
2. The formation of sedimentary rocks involves the weathering of preexisting rocks
3. Sedimentary rocks contain fossils
4. Sedimentary rocks typically occur in layers
Which of these statements are correct?

7. If the starts are seen to rise perpendicular to the horizen by an observer, he is located on the: [2001]

8. Consider the following statements regarding asteroids: [1998]
1. Asteroids are rocky debris of varying sizes orbiting the Sun
2. Most of the asteroids are small but some have diameter as large and 1000 km
3. The orbit of asteroids lies between the orbits of Jupiter and Saturn
Of these statements:

9. Estuaries possess distinct blooms of excessive growth of a pigmented dinofagellates. These blooms are called [1998]

10. Stiglitz Commission established by the President of the United Nations General Assembly was in the international news. The commission was supposed to deal with [2010]