#1. Action and reaction do not balance each other because they:
#2. When electric current is passed through a metallic conductor, amount of heat produced in the conductor depends on its:
#3. If you have to change a feeble sound to a loud sound then required change is to increase its :
#4. Where should an object be placed front of a convex lens to get a real image of the size of the object ?
#5. You have a story bar magnet made of steel. If you cut this magnet in three identical parts, then you get:
#6. When white light passes through prism, the colour which bends the least is :
#7. A laboratory thermometer shows five small division between the marking of 50°C and 51°C.This means that thermometer can read correctly up t
#8. This S.I. unit of calorific value is :
#9. Which one of the following planets has no natural satellite of its own ?
#10. Power of which lens is negative ?
#11. The least distance of distinct vision for a young adult with normal vision is about :
#12. Melting point of Tungsten is :
#13. Sound waves in air are:
#14. Which of these is used in solar cells ?
#15. Frequency of A.C. supplied to consumers in India is :
#16. Uniform circular motion of an object is :
#17. Relation between force, mass and acceleration is given by :
#18. The change in focal length of an eye is caused by the action of the:
#19. Which of the following is not the unit energy ?
#20. A farmer moves along the boundary of a square field of side 10 m in 40s. The magnitude of displacement of the farmer at the end of 2 minutes and 20 seconds is :
#21. In which one of the following heat is transferred by the process of conduction ?
#22. A merry - go round is moving at a non - varying speed of 10 ms. It implies that :
#23. Speed of sound in air at 0°C is:
#24. Infrasound can be heard by:
#25. Velocity-time graph for non-uniformly accelerated motion is :
#26. A bird flying at a certain height possesses:
#27. A person uses bifocal lenses for the correction of :
#28. Mass of an object in air is 40 kg. Mass of this object in water will be :
#29. Sound can travel through:
#30. A person living in Shimla observed that cooking food without using pressure cooker takes more time. The reason for this observation is that a high altitude:
#31. Permanent hardness of water is due to the presence of :
#32. Plaster of Paris is chemically :
#33. What is D.D.T. among the following ?
#34. The most durable metal plating on iron to protect against corrosion is :
#35. Phosphorus is kept in :
#36. Which of the following element is present in haemoglobin ?
#37. Enzymes are regarded as :
#38. What is blue vitrol ?
#39. Which of the following elements exhibits maximum number of valence electrons ??
#40. A wooden spoon is dipped in a cup of ice cream. Its other end:
#41. An iron ball at 40°C is dropped in mug containing water at 40°C, The heat will :
#42. Vinegar is a solution of:
#43. The elements of group 18 are called :
#44. Cinnabar is an ore of :
#45. Which type of bond is present in NaCl molecule ?
#46. The process employed for the concentration of sulphide ore is :
#47. What is the common name of the compound CaOCl2?
#48. What is the PH value of NaCl aqueous solution ?
#49. The chief ore of iron is :
#50. Stainless steel contains:
#51. In which solution gold is soluble ?
#52. Which method is commonly used to separate salt from water?
#53. The correct way of making a solution of sulphuric acid in water is to :
#54. Polycot is obtained by mixing :
#55. Which is a thermosetting plastic ?
#56. The most suitable material for the preparation of handles of cooking utensils is :
#57. Fossil fuels are obtained from :
#58. Which of the following is not a constitute of petroleum ?
#59. Materials which can be drawn into wires are called ductile. Which of the following is not a ductile material ?