PM Yashasvi 9th Class Science Model Paper 1 | Yashasvi ImportantQuestions

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PM Yashasvi 9th Class Science Model Paper 1 | Yashasvi Important Questions

 

1. _______ is known as artificial silk.
a) Rayon
b) Nylon
c) Polyester
d) None of the above
Answer: a

2. Which of the following is the most potent synthetic fibre?
a) Rayon
b) Nylon
c) Polyester
d) None of the above
Answer: b

3. Which of the following is made from wood pulp?
a) Rayon
b) Nylon
c) Polyester
d) None of the above
Answer: a

4. Which of the following is used to obtain nylon?
a) Air
b) Coal
c) Water
d) All of the above
Answer: d

All competitive exam’s most important Bits

5. Which of the following is caused by plastic burning?
a) Water pollution
b) Sound pollution
c) Air pollution
d) All of the above
Answer: c

6. Choose a biodegradable substance.
a) Thermoplastic
b) Thermosetting plastic
c) PVC pipes
d) None of the above
Answer: d

7. Why do we use plastic containers for storing food?
a) They are strong
b) They are durable
c) They are light in weight
d) All of the above
Answer: d

8. Why are the applications of plastics in the medical industry?
a) Stitching wounds
b) Manufacturing gloves
c) Packing tablets
d) All of the above
Answer: d

9. Which of the following is a synthetic fibre?
a) Jute
b) Nylon
c) Wool
d) None of the above
Answer: b

10. _______ is used to manufacture rayon.
a) Wool
b) Wood pulp
c) Silk
d) None of the above
Answer: b

11. How is cotton comparable to artificial silk?
a) They are cellulose polymer
b) They melt on heating
c) Both (a) and (b)
d) None of the above
Answer: a

12. Polycot is synthesised by combining _______ and ______.
a) Polymer and cotton
b) Polyester and cotton
c) Polygon and cotton
d) None of the above
Answer: b

13. Which of the following is a thermosetting plastic?
a) Silicones
b) Vulcanised rubber
c) Polyester
d) All of the above
Answer: d

14. Which of the following is used to make handles of utensils?
a) Polyvinyl chloride
b) Bakelite
c) Both (a) and (b)
d) None of the above
Answer: b

15. PET is the abbreviation of ________.
a) Polyethylene terpenoid
b) Polyethyl terpenoid
c) Polyethylene terephthalate
d) None of the above
Answer: c

16. PVC is the abbreviation of _______.
a) Polyvinyl chloride
b) Polyvenyl chloride
c) Polyoxyvinyl chloride
d) None of the above
Answer: a

All competitive exam’s most important Bits

17. Rayon shows properties similar to ______.
a) Jute
b) Cotton
c) Silk
d) None of the above
Answer: c

18. Which of the following is thermoplastic?
a) Polyethene
b) Teflon
c) Polyvinyl chloride
d) All of the above
Answer: d

19. Which of the following is obtained from petroleum?
a) Polyester
b) Jute
c) Nylon
d) None of the above
Answer: a

20. PET is a ______.
a) Polyamide
b) Polyester
c) Both (a) and (b)
d) None of the above
Answer: b

21. Which of the following acids is formed when sulphur dioxide is dissolved in water?
a) Sulphuric acid
b) Sulphurous acid
c) Thiosulphurous acid
d) None of the above
Answer: b) Sulphurous acid

22. What kind of sound does hydrogen gas make when a lit candle is placed close to the mouth of the test tube where it is evolved?
a) Tinkling
b) Pop
c) Bell tone
d) Sizzle
Answer: b) Pop

23. Which of the following is a non-metal that can be stored in the water?
a) Sodium
b) Potassium
c) Phosphorous
d) Calcium
Answer: c) Phosphorous

24. Which of the following causes blue litmus paper to turn red?
a) Lubricating grease
b) Baking Soda
c) Vinegar
d) Soap
Answer: c) Vinegar

25. Which gas results from the reaction of metals and sodium hydroxide?
a) Oxygen gas
b) Hydrogen gas
c) Carbon dioxide gas
d) All of the above
Answer: b) Hydrogen gas

26. Which of the following can displace copper from copper sulphate?
a) Silver
b) Zinc
c) Platinum
d) Gold
Answer: b) Zinc

27. Which of the following, when hammered, can become a powdery mass?
a) Aluminium
b) Carbon
c) Magnesium
d) Iron
Answer: b) Carbon

28. Some materials have properties such as hardness, lustrousness, malleability, ductility, sonority, and good conductivity of heat and electricity. Identify the material.
a) Non-metals
b) Metals
c) Semiconductors
d) Insulators
Answer: b) Metals

29. Which of the following is not a non-metal?
a) O
b) Cl
c) Be
d) Graphite
Answer: c) Be

30. What is the correct formula for the product formed when magnesium reacts with oxygen?
a) Mg2O
b) MgO
c) MgO2
d) Mg2O2
Answer: b) MgO

31. Which of the following oxide is acidic in nature?
a) CaO
b) Al2O3
c) SO2
d) K2O
Answer: c) SO2

32. Which of the following is not a metal and is solid?
a) Chlorine
b) Iodine
c) Bromine
d) Sodium
Answer: b) Iodine

33. Which of the following non metals is lustrous?
a) Oxygen
b) Bromine
c) Iodine
d) Chlorine
Answer: c) Iodine

34. Metals are typically solid by nature. At room temperature, which of the following metals is in a liquid state?
a) Br
b) Hg
c) Na
d) I
Answer: b) Hg

35. Which of the following characteristics of aluminium makes it appropriate as a wire?
a) Ductility and a good conductor of electricity
b) Only good conductor of electricity
c) Only ductility
d) Malleability
Answer: a) Ductility and good conductor of electricity

36. What is the colour of the coating a copper vessel develops when exposed to air?
a) Reddish Brown
b) Green
c) Silvery
d) Black
Answer: b) Green

37. following metals reacts with water slowly?
a) Na
b) K
c) Fe
d) P
Answer: c) Fe

38. What is the primary source of minerals in the soil?
a) Plants
b) Animals
c) Parent rock
d) All of the above
Answer: c

39. Which of the following is not a petroleum product?
a) Kerosene
b) Beeswax
c) Pitch black
d) None of the above
Answer: b

40. Which of the following is the purest form of carbon?
a) Coal gas
b) Coal tar
c) Coke
d) None of the above
Answer: c

41. Which of the following are vital constituents of petroleum?
a) Butane
b) Liquified petroleum gas
c) Jet fuel
d) All of the above
Answer: d

42. Which of the following is used as an industrial fuel?
a) Coal gas
b) Nitrogen gas
c) Carbon dioxide gas
d) All of the above
Answer: a

43. Which of the following is used to manufacture steel?
a) Coke
b) Coal gas
c) Coal tar
d) All of the above
Answer: a

44. Which of the following petroleum content boils at temperatures greater than 350o C?
a) Diesel oil
b) Petroleum gas
c) Lubricating oil
d) All of the above
Answer: c

45. Which of the following petroleum product is used as a solvent for dry cleaning clothes?
a) Petrol
b) Liquified petroleum gas
c) Lubricating oil
d) All of the above
Answer: a

46. Petroleum is a _______ solution.
a) Liquid-liquid
b) Gas-gas
c) Liquid-gas
d) All of the above
Answer: a

47. What is the source of coal formation?
a) Plants
b) Animals
c) Both plants and animals
d) None of the above
Answer: a

48. Which of the following is the characteristic of exhaustible natural resources?
a) They are unlimited
b) They are limited
c) They are not dependent on nature
d) All of the above
Answer: b

49. Which of the following are examples of exhaustible natural resources?
a) Water and sunlight
b) Wildlife and minerals
c) Coal and sunlight
d) All of the above
Answer: b

50. the primary element of liquified petroleum gas and compressed natural gas?
a) Butane and hexane
b) Methane and hexane
c) Methane and butane
d) All of the above
Answer: c

51. Which of the following is not a natural resource?
a) Sunlight
b) Water
c) Plastic
d) None of the above
Answer: c

52. ________ is a thick black liquid with an unpleasant odour.
a) Coal tar
b) Gasoline
c) Diesel oil
d) All of the above
Answer: a

53. LPG is the abbreviation of ________.
a) Liquified petroleum gas
b) Low petroleum gas
c) Liquid pressure gas
d) None of the above
Answer: a

54. CNG is the abbreviation of ________.
a) Compressed natural gas
b) Compress natural gas
c) Compress national gas
d) None of the above
Answer: a

55. Choose the correct statement.
a) Density of coal is less than coke
b) Density of coal is more than coke
c) Density of coal is equal to coke
d) None of the above
Answer: b

56. Which of the following is not a free state of carbon?
a) Petrol
b) Coke
c) Diamond
d) All of the above
Answer: a

57. What is the common name of petroleum?
a) Blue gold
b) Yellow gold
c) Black gold
d) None of the above
Answer: c

58. Which of the following is a chemical reaction that produces heat when a substance reacts with oxygen?
a) Oxidation
b) Combustion
c) Reduction
d) Hydrolysis
Answer: b) Combustion

All competitive exam’s most important Bits

59. Ignition temperature is the ________ temperature at which the substance catches fire.
a) Highest b) Lowest
c) Maximum d) Room
Answer: b) Lowest

60. A mixture of antimony trisulphide, potassium chlorate, and white phosphorus, along with glue and starch, was applied to the head of a suitable wood match. Which of the following chemicals ignites when struck against a rough surface?
a) Antimony trisulphide
b) White Phosphorous
c) Glue
d) Starch
Answer: b) White Phosphorous

61. Which of the following is not an inflammable substance?
a) Alcohol b) Wood
c) Ethanol d) Liquified Petroleum Gas

Answer: b) Wood

62. Which of the following is the best fire extinguisher for electrical equipment and inflammable substances?
a) Water
b) CO2
c) O2
d) All of the above

Answer: b) CO2

63. Which of the following describes a type of combustion in which a substance suddenly bursts into flame without any apparent cause?
a) Rapid
b) Explosion
c) Spontaneous
d) None of the above
Answer: c) Spontaneous

64. Which of the following is not an ideal fuel characteristic?
a) Costly
b) Readily available
c) Easy to transport
d) High calorific value
Answer: a) Costly

65. Which of the following units expresses fuel efficiency in terms of calorific value?
a) kg/kJ
b) kJ/kg
c) J/kg
d) J/g
Answer: b) kJ/kg

66. Which of the following does not burn with a flame?
a) Molten wax
b) Kerosene oil
c) Charcoal
d) Camphor
Answer: c) Charcoal

67. Which of the following is a fuel that is good for the environment and is used in automobiles?
a) Diesel
b) Petrol
c) Natural gas
d) Petroleum gas
Answer:c) Natural gas

68. Which of the following fuels has a calorific value of 45000 kJ/kg?
a) Cow dung cake
b) Petrol
c) LPG
d) Biogas
Answer: b) Petrol

69. Incomplete combustion of fuels releases ____ gas.
a.) NO2
b.) CO
c.) CO2
d.) SO2
Answer – (b.) CO

70. Which kind of pollutant can easily be removed from polluted water?
a.) Solid
b.) Liquid
c.) Dissolved
d.) Nutrients
Answer – (a.) Solid

71. Which of the following fuels causes minimum air pollution?
a.) Kerosene oil
b.) Petrol
c.) Coal
d.) Hydrogen
Answer – (d.) Hydrogen

72. The most polluted river in the world is ____.
a.) Yamuna river
b.) Ganga river
c.) Cauvery river
d.) Chenab river
Answer – (b.) Ganga river

73. Global warming causes:
a.) Change in pressure of earth
b.) No change in temperature
c.) Increase in temperature of earth
d.) Decrease in temperature of the earth
Answer – (c.) Increase in temperature of earth

74. Which of the following methods of water purification will not kill microorganisms?
a.) Distillation
b.) Boiling
c.) Chlorination
d.) Filtration
Answer – (d.) Filtration

75. Which of the following is/are greenhouse gas?
a.) Carbon dioxide
b.) Methane
c.) Nitrous oxide
d.) All of the above
Answer – (d.) All of the above

76. The last step in the treatment of sewage is ____.
a.) Aeration
b.) Chlorination
c.) Evaporation
d.) Decantation
Answer – (b.) Chlorination

77. Which of the following is a natural source of air pollution?
a.) Volcanic eruptions
b.) Forest fire
c.) Smokes from industries
d.) Automobile exhausts
Answer – (a.) Volcanic eruptions and (b.) Forest fire

78. Water that is fit for drinking purposes is known as ____.
a.) Potable water
b.) Sewage water
c.) Seawater
d.) Portable water
Answer – (a.) Potable water

79. Smog is a mixture of:
a.) Water and air
b.) Smoke and dust
c.) Smoke and fog
d.) Fog and dust
Answer – (c.) Smoke and fog

80. Which of the following is not a major source of water pollution?
a.) Agricultural waste
b.) Industrial waste
c.) Untreated sewage
d.) None of the above
Answer – (d.) None of the above

81. The gas responsible for acid rain is:
a.) NO2
b.) CO2
c.) SO2
d.) CH4
Answer – (a.) NO2 and (c.) SO2

82. The Ganga Action Plan was launched by:
a.) Mahatma Gandhi
b.) Rajeev Gandhi
c.) Indira Gandhi
d.) Jawaharlal Nehru
Answer – (b.) Rajeev Gandhi

83. Which of the following is not a greenhouse gas?
a.) Carbon dioxide
b.) Nitrogen
c.) Methane
d.) Nitrous oxide
Answer – (b.) Nitrogen

84. The impurities in sewage are a suspended mixture of:
a.) Organic impurities
b.) Inorganic impurities
c.) Faecal matter
d.) Food waste
Answer – (a.) Organic impurities and (b.) Inorganic impurities

85. The phenomenon of trapping heat in the atmosphere is:
a.) Ozone depletion
b.) Greenhouse effect
c.) Global warming
d.) Air pollution
Answer – (b.) Greenhouse effect

86. Which of the following diseases is caused due to drinking contaminated water?
a.) Typhoid
b.) Polio
c.) Dengue
d.) Measles
Answer – (a.) Typhoid and (c.) Dengue

87. Which of the following gases is responsible for an increase in global warming?
a.) Methane and CO2
b.) Methane and CO
c.) Methane and O3
d.) Methane and NO2
Answer – (a.) Methane and CO2.

88. Which of the following steps can be taken to reduce water pollution?
a.) Planting more trees
b.) Treating sewage water before discharging
c.) Using organic fertilisers and pesticides
d.) All of the above
Answer – (d.) All of the above

89. Diseases like polio and chicken pox are caused by _______
a) Bacteria
b) Fungi
c) Virus
d) Worms
Answer: (c)

90. Examples of Multicellular Microorganism are
a) Algae, Bacteria
b) Bacteria and Fungi
c) Bacteria and Viruses
d) Algae and Fungi
Answer : (d)

91. Some medicines obtained from micro-organisms are applied to kill or stop the growth of disease-causing microorganisms. Such medicines are called ______.
a) Antibodies
b) Antibiotics
c) Antiseptics
d) All of the above
Answer: (b)

92. A common preservative used in jam and pickles is
a) Sodium benzoate
b) Nitric acid
c) Sodium Chloride
d) Copper Sulphate
Answer: (a)

93. Rhizobium found in root nodules of leguminous roots is an
a) Atmospheric Carbon fixer
b) Atmospheric Oxygen fixer
c) Atmospheric Nitrogen fixer
d) All of the above
Answer: (c)

94. Lactobacillus is commonly found in
a) Cake
b) Curd
c) Bread
d) All of the above
Answer: (b)

All competitive exam’s most important Bits

95. The process of conversion of sugar into alcohol by yeast is called
a) Fermentation
b) Pasteurisation
c) Alcoholism
d) All of the above
Answer: (a)

96. The pores in the bread is due to gas bubbles of
a) Oxygen
b) Nitrogen di oxide
c) Nitrogen
d) Carbon di oxide
Answer: (d)

97. Deliberately injecting weak microbes into a healthy body and producing antibodies to fight against strong microbes is called _______
a) Medication
b) Antibiotics
c) Vaccination
d) All of the above
Answer: (c)

98. The microbe for Malaria is carried by
a) Male Anopheles mosquito
b) Female Anopheles Mosquito
c) Male Aedes mosquito
d) Female Aedes mosquito
Answer: (b)

99. A chain of small chemical units combined to form a large single unit is called ____
a) Polymer
b) Poly
c) Polythene
d) None of the above
Answer: (a)

100. Polythene and PVC are examples of
a) Bio degradable substance
b) Thermosetting plastics
c) Thermoplastics
d) Rayon
Answer: (c)

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