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91. Natural rubber is heated with _______________ to prepare vulcanized rubber that is used in tyres.
  A.  Phosphorus
  B.  Sulphur
  C.  Chlorine
  D.  Potassium
     
   
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92. __________________ is the purest form of carbon.
  A.  Diamond
  B.  Graphite
  C.  Lonsdaleite
  D.  Fullerenes
     
   
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93. The black electrode used in dry cell is made up of:
  A.  Lead
  B.  Copper
  C.  Zinc
  D.  Graphite
     
   
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94. _____________ is the physical phase of life.
  A.  Chromosomes
  B.  Nucleolus
  C.  Protoplasm
  D.  Mitochondria
     
   
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95. Which cells in the human body that are responsible for eating foreign particles like bacteria?
  A.  Lymphocytes
  B.  Phagocytes
  C.  Basophils
  D.  Eosinophils
     
   
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96. Human body contains ________ number of muscles.
  A.  629
  B.  659
  C.  639
  D.  649
     
   
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97. Life span of RBC is __________ and of WBC is _______________.
  A.  150 days, 2-25 days
  B.  120 days, 10-30 days
  C.  90 days, 20-40 days
  D.  120 days, 2-15 days
     
   
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98. Which one of the following vertebrate has two chambered heart?
  A.  Frogs
  B.  Fish
  C.  Snake
  D.  Bird
     
   
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99. Which one of the following is known as ‘master gland’ of human body?
  A.  Pituitary gland
  B.  Hypothalamus
  C.  Thyroid
  D.  Adrenals
     
   
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100. Normal blood sugar level in human body is:
  A.  70 to 110mg/100 ml of blood
  B.  90 to 140mg/100 ml of blood
  C.  80 to 120mg/100 ml of blood
  D.  100 to 130mg/100 ml of blood
     
   
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