Instructions Time Duration: 60 minTotal Question: 40Total Mark: 160All the Questions are compulsoryEach right answer carries 4 MarksEach wrong answer carries -1 Marks (Negative mark)Once you submit the paper, you cannot reattempt 0% Class 8 AAITHE Test 1 / 40 1. Read the following statements :(i) Non metals are good conduction of electricity(ii) Graphite is a non-metal and good conduction of electricity. a) both are correct b) statement (ii) is correct but (i) is wrong c) statement (i) is correct but (ii) is wrong d) both are wrong 2 / 40 2. perpendicular force acting per unit area is called energy through work pressure 3 / 40 3. Rolling friction and sliding friction are two types of – a) Static friction b) Directional friction c) Dynamic friction d) Fluid friction 4 / 40 4. To walk on slippery ground is difficult because of the – a) Ground floor very high resistance to walk b) Habit of walking slippery ground is not enough to walk. c) Friction force is not enough to prevent slip. d) Friction force is very high to walk. d) Friction force is very high to walk. 5 / 40 5. Ultra sound has frequency of vibration a) Below 20 Hz b) Between 500 and 10,000 Hz c) Between 20 and 20,000 Hz d) Above 20,000 Hz 6 / 40 6. The force required to overcome friction at the instant and object start moving from rest is measure of – a) Static friction b) Sliding friction c) Dragging friction d) Rolling friction 7 / 40 7. Some force produces more pressure on – a) Circular area b) Larger area c) Smaller area d) Casual area 8 / 40 8. What does air resistance do to facing objects – a) Increase its mass b) Make them rise c) Slowdown them d) Speeds them up 9 / 40 9. Friction offered by watch is good for the a) Movement of ships of boat b) Respiration of aquatic organisms c) Health d) Breathing of aquatic plants 10 / 40 10. The repatation of sound caused by the reflection of sound weaves is called – a) Reflection of sound b) Propagation c) Echo d) Reverberation 11 / 40 11. An example where physical & chemical changes occur simultaneously is a) Burning of Mg ribbon b) Burning of candle c) Melting of ice d) Evaporation 12 / 40 12. Water and benzene can be separated by a) sublimation b) separating funnel c) filtration d) decentation 13 / 40 13. The idea of stationary orbits was given by a) Dalton b) Rutherford c) Neils Bohr d) Maxwell 14 / 40 14. When 100g CaCO3 is heated, it gives a) 44g CaO 56g CO2 b) 44g CO2 56g CaO c) 50g each of CaO and CO2 d) 100g CaO 15 / 40 15. Which of the following metals cannot produce H2 gas when treated with Hcl? a) Cu b) Zn c) Fe d) Mg 16 / 40 16. Which is the following is the anhydride of H2SO4? a) SO2 b) H2S c) S8 d) SO3 17 / 40 17. Which of the following is crystalline allotrope of carbon? a) Soot b) Lamp black c) Fullerene d) Coal 18 / 40 18. The process by which hard water can be converted into soft water a) Calcinations b) Permutit c) Roasting d) Zone refining 19 / 40 9. (a) Option - a) (b) Option - b) (c) Option - c) (d) Option - d) 20 / 40 20.The formula of sodium zincate isNa2 ZnO2Na3 ZnO2Na ZnO2Na2 ZnO3 a) Option - 1 b) Option - 2 c) Option -3 d) Option - 4 21 / 40 21.Yellowish plasma of human blood contains water about _______ % a) 50% b) 70% c) 80% d) 90% 22 / 40 22. The instrument use to find out blood pressure is called – a) Sphygmomanometer b) Barometer c) Thermometer d) Galvanometer 23 / 40 23. Pulmonary vein carries – a) deoxygenated blood b) oxygenated blood c) both of these d) none of these 24 / 40 24. which of following options having only dead cells – a) xylem parenchyma and phloem parenchyma b) xylem fibre and phloem fibre c) xylem fibre and siere tube d) tracheid and siere tube 25 / 40 25. ‘cutting and layering’ is a method of – a) Artificial pollination b) Self-pollination c) Artificial vegetative propagation d) Budding 26 / 40 26. Which is the following is/are not a false fruit? a) Apple a) Pear c) Strawberry d) Mango 27 / 40 27. In a germinating seed, ________ is act as future shop. a) Plumule b) Radicle c) Perigeal d) Hypocotyls 28 / 40 28. The natural way of fixing thembryo in the uterine wall after 7 days of fertilization is known as – a) Implantation b) Zygote c) Embryo d) Foetation 29 / 40 29. Pictures/diagrams that shown in below is example of – a) Endocrine gland b) Exocrine gland c) Mixed gland d) None of the above 30 / 40 30. Irrigation is required during a) Hervesting b) Weeding c) Sowing manoring. d) None of these 31 / 40 31. a) Commutative Property b) Associative Property c) Distributive Property d) none of these 32 / 40 32. a) 2 b) 3 c) 4 d) 5 33 / 40 33. If one number of pythagoreous triplet is 6 then the triplet is – a) (4,5,6) b) (5,6,7) c) (6,7,8) d) (6,8,10) 34 / 40 34. 3 persons can paint a house in 8 days, then 4 person can paint the same house in – a) 5 days b) 6 days c) 7 days d) 18 days 35 / 40 35. a) 126 b) 121 c) 221 d) none of these 36 / 40 36. The some of the digit of two digit number in 12, if 18 is added to it, then the digit is reversed, then the number is – a) 57 b) 58 c) 58 d) 60 37 / 40 37. a) (P-10)(2P+3) b) (P+10)(2P-3) c) (2P-3)(P-10) d) none of these 38 / 40 38. Option (a) Option (b) Option (c) Option (d) 39 / 40 39. Option (a) Option (b) Option (c) Option (d) 40 / 40 40. If the area of a Rhombus is 90cm, and the length of one diagonal is 10cm, then the length of other diagonal is – a) 18cm b) 9cm c) 36cm d) 4.5cm