46.The important metal used with iron to produce stainless steel is:

47.Which is a celestial phenomenon occurring due to stars?

48.Match List I with List II and select the correct answer using the codes given below the lists: List I : (Oceanic Trench) a) Aleutian b) Kermadec c) Sunda d) S. Sandwich List II : (Location) 1. Indian Ocean 2. North Pacific Ocean 3. South Pacific Ocean 4. South Atlantic Ocean Codes: (a) (b) (c) (d)

49.An aeroplane takes off from 30� North Lat., 50� East Long and lands at the opposite and of the earth. Where does it land?

50.Captain of a ship moving westward records the local time of the 10.00 hrs Monday at 90�W. If the speed of the ship is the same as the speed of the rotation of the earth, which of the following local time and day would be found by the captain at International date line?