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11. The sunlight consists of which of the following types of waves?
  A.  Ultraviolet rays and Visible light
  B.  Both A & C
  C.  Infra-red rays
  D.  Ultraviolet rays and infra-red rays
     
   
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12. Ultra-violet rays have the __________________ wavelengths.
  A.  Longest
  B.  Medium
  C.  Sharp
  D.  Shortest
     
   
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13. Infra-red rays have the __________________ wavelengths.
  A.  Longest
  B.  Medium
  C.  Shortest
  D.  Sharp
     
   
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14. Which of the following rays emitted by sun have the heating effect?
  A.  Both C & D
  B.  Visible light
  C.  Infra-red rays
  D.  Ultra-violet rays
     
   
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15. What type of rays are emitted by a hot electric iron?
  A.  Infra-red rays
  B.  Alpha and Beta rays
  C.  Ultra-violet rays
  D.  Gamma rays
     
   
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16. Which type of carbohydrate is not digest by human body and acts as roughage?
  A.  Acids
  B.  Cellulose
  C.  Starch
  D.  Sugar
     
   
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17. What are the properties of Saturated fats?
  A.  These fats have only carbon-carbon single bonds in their molecules and more stable
  B.  These have high melting points and solidify at room temperature in winters
  C.  These mostly occur in vegetable oils
  D.  Both A & B
     
   
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18. What are the properties of Unsaturate fats?
  A.  These have one or more carbon-carbon double bonds in their molecules are more reactive
  B.  These fats have low melting points and remain in liquid form at room temperature
  C.  Both A & B
  D.  Butter, coconut oil and animal fats are its examples
     
   
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19. How will you test the presence of protein in the food item?
  A.  Benedict's solution is used to proteins
  B.  Nitric acid and Ammonium Hydroxide are used to test proteins
  C.  Iodine solution is used to test proteins
  D.  Both A & C
     
   
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20. Which of the following minerals are needed by human body
  A.  Iron, Iodine and Calcium
  B.  Phosphorus, Sodium and Potassium
  C.  Both A & B
  D.  Sodium, Potassium, Iron, Iodine, Calcium, Mercury, Lead, Sulfide and Fluorine
     
   
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