1. Which of the following countries is not in Europe ? a. Canada b. Austria c. Norway d. Luxemburg Ans: a 2. The hottest planet is : a. Jupiter b. Saturn c. Venus d. Mercury Ans: c. 3. Which of the following is the brightest planet ? a. Mars b. Jupiter c. Venus d. Mercury Ans: c 4. The exact time taken by earth for single rotation on its own axis is : a. 24 hours b. 23 hours 50 minutes 7.2 sec. c. 24 hours 35 sec. d. 23 hours 56 minutes 4.09 sec Ans: d 5. A black hole is a : a. star with a very low surface temperature b. star with no atmosphere c. contracted star with intense gravitational pull d. pulsating star Ans: c 6. The brightest star in the sky is : a. Alfa Centauri b. Sirius c. Sun d. Proxima Centauri Ans: c 7. Which of the planet is nearest to the Earth ? a. Venus b. Mercury c. Mars d. Jupiter Ans: a 8. The earth rotates around its axis from : a. east to west b. west to east c. north to south d. south to north Ans: b 9. Nights are cooler in the deserts than in the plains bec