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                                             If u use a microscope to watch smoke particles in still air, u ll see them moving about all the time. This phenomenon is called ? a. Brownian movement   b. Osmosis   c. Tyndall effect    d. Diffusion 27. The mass of a neutron is approximately a. Equal to the mass of proton       b. Three times the mass of a proton 3. Twice the mass of a proton       4. Zero 28. The spherical shape of rain drops is due to a. Atmospheric friction of air     b. Gravity of spherical earth c. Surface tension of rain water     d. Viscosity of rain water 29. Galvanometer is an instrument a. For measuring volume change in chemical reactions btw gases b. For measuring currents of small magnitude c. Which prints automatically messages sent from one place to another d. For recording high temperature from a distance 30. Which of the following has highest frequency? a. Gamma rays    b. Microwaves    c. Light waves   d. Radio waves 31. If an iron is marked 750 watts by 250 volts, then it was designated to take a current of a. 3 Amperes    b. 9 Amperes    c. 6 Amperes   d. 15 Amperes 32. The blue colour of the sky is due to a. Polarization of light   b. Scattering of light  c. Reflection of light   d. None of these 33. Geiger counter is an instrument a. Determine the heart beat rate    b. To detect radioative radiation c. To measure intensity of visible light   d. To count the baggage of an airport 34. When we are looking at a rainbow in front of us, The sun must be a. high in the sky and is located either on our rigght or left b. In front of us     c. Behind us 35. When as the satellite is in thhe geostationary orbit , its a. Orbital distance is equal to the radius of the earth b. Acceleration is zero    c. Orbital period is about 24 hours  d. Angular velocity is zero 36. The most intense man-made light souce is a. Master    b Laser     c. Mercury Vapour Lamp    d. Light emitting diode (LED) 37. How many calories will b needed to raise the temperature of 10 grams of water from 200 to 3000? a. 1   b. 10    c. 100      d. 200 38. The branch of biological science " Ecology " deals with the study of a. Plants in relation to their environment   b. Animals in relation to plants c. All living things in relation to their environment   d. Animals in relation to their environment 39. The film of oil and soapy water owe their brilliant colours to a combination of light reflection and a. Refraction    b. Polarization    c. Diffraction     d. Interference 40. The solar ultraviolet rays fo not harm living organism because a. The ozone layer of the atmosphere weakens them    b. They are weak rays c. They have to pass through a thich column of the atmosphere d. The atmospheric nitrogen dilutes them 41. Most important effect of moon on earth is that a. Gives light   b. Causes earthquake    c. Causes solar & lunar eclipse   d. Effects tides of ocean 42. The term " Meteor" is applied to an interplanetary body, a. Before it enter the earth`s atmosphere    b. After it enters the earth`s atmosphere c. After it centers the earth`s atmosphere d. After it centers the earth`s atmosphere and lands on the surface of the earth without exploding in mid air 43. Newton`s rings are a. Celestial body named by newton        b. Rings presented to newton by a king c. An optical phenomenon             d. Coloured rings observed around the point of contact of a convex lense 44. The heat recieved by earth from the sun is known as a. Insulation    b. Solar heat    c. Solar radiation  d. Thermal radiation`s 45. Constellation is a. Configuration of fixed stars resembling a figure b. Group of satellites   c. Group of comets   d. None of above 46. Which of the following part of the atmosphere is nearest to the earth a. Troposphere   b Stratosphere    c. Lonosphere   d. Mesosphere 47. To an astronaut in space sky looks a. Deep blue  b. White   c. Black   d. Orange red 48. Why does the sun looks oval when it is at the horizon ? a. When the sun is at the horizon rays from the longer edge are refracted more coz it passes through greater thickness of air so vertical diameter is shortened to give an oval shape b. When at the horizon sun is pulled by other planets and becomes elongated c. While setting or rising sun is elliptical d. None of these 49. The moon has period of rotation which is equal to period of revolution . It is a. 29 days, 7 hours , 43 min , 1147 sec   b. 20 days, 6 hours , 50 min , 20 sec c. 31 days, 8 hours , 42 min , 10 sec   d. None of these 50. The composition of the sun is a. hydrogen 90% , Helium 8% , Heavy elements 2% b. hydrogen 95% , Helium 3% , Heavy elements 2% c. hydrogen 80% , Helium 10% , Heavy elements 10% d. None of above Answers 26. a , 27. a , 28. a , 29. b , 30. A 31. a , 32. b , 33. b , 34. a , 35. A 36. a , 37. a , 38. b , 39. a ,40.a 41. d , 42. b , 43. d , 44. c , 45. A 46. a , 47. c , 48. a , 49. a , 50. A
1. Neil A. Armstrong visited the moon on july 16, 1969 and remained there for 21 hours and 36 min. Name the manned spacecraft which took him on this mission ? a. U.S Gemini 12  b. USSR Soyuz 5   c. U.S Apollo 2   d. U.S Apollo 9 2. How much time the light takes to reach from the sun to the earth? a. Four minutes and 30 sec b. eight min and 15 sec  c. Seven min and 15 sec d. Six min and30sec 3. Astronomical unit is a bigger unit of distance and it is used to measure distance btw the heavenly bodies of the solar system .One astronomical unit is equal to how much Km in whole numbers? a. 50 million km  b. 100 million km   c. 150 million km  d. one million km 4. Name the nearest Star to our sun. a. Proxima Centurai  b. Alpha Scorpii   c. Beta Orionis   d. Vega 5. Name the nearest regular qalaxy to our milky way a. NGC 185   b. Small Magellanic   c. Large Magellanic Cloud   d. Andromeda 6. Name the largest moon in our solar system a. Ganymede   b. Titan  c. Callisto    d. Miranda 7. Atmosphere of the earth is made up of different spheres. In which part of the atmosphere commercial aircrafts usually fly. a. Thermosphere   b. Stratosphere   c.. Troposphere   d. Mesosphere 8. The sun arised on the North pole on the 21st march and this pole remains in light till what date a. 23rd sep  b. 21st sep   c. 22nd june   d. 22nd dec 9. Name the gas which was discovered on the sun about 125 years ago during eclipse-watching.. a. Hydrogen   b. Helium   c. Nitrogen    d. Argon 10. What is the approximate age of the sun ? a. 6.4 thousands years   b. 6.4 billion years  c. 6.4 million years  d. 6.4 hundred thousands years ANSWERS 1. C , 2. b , 3. c , 4. a , 5. d    6. a , 7. c , 8. a , 9. b , 10. B