116. Polythene is:

1. 1. a polymer of ethylene

   
   
   

   2. a vulcanised rubber

   
   
   

   3. impregnated cotton

   
   
   

   4. cellulose derivative

   
   
   

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1. View Hint View Answer Discuss in Forum

   Polythene is a polymer of ethylene.

   Correct Option: A

   Polythene is a polymer of ethylene.

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117. Ferrites are:

1. 1. Ferromagnetic

   
   
   

   2. Ferrimagnetic

   
   
   

   3. Paramagnetic

   
   
   

   4. Antimagnetic

   
   
   

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1. View Hint View Answer Discuss in Forum

   Ferrites are ferrimagnetic.

   Correct Option: B

   Ferrites are ferrimagnetic.

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118. For molybdenum, which has a body-centered cubic lattice structure, the number of atoms per unit cell is:

1. 1. 1

   
   
   

   2. 2

   
   
   

   3. 4

   
   
   

   4. 6

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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119. All of the following ceramic materials are isotropic except:

1. 1. SiO₄

   
   
   

   2. SiO₂

   
   
   

   3. MgSiO₃

   
   
   

   4. Al₂O₃

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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120. For a magnetic material when temperature is raised above Curie temperature, the material will become:

1. 1. ferromagnetic

   
   
   

   2. paramagnetic

   
   
   

   3. diamagnetic

   
   
   

   4. semiconductor

   
   
   

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1. View Hint View Answer Discuss in Forum

   For a magnetic material when temperature is raised above Curie temperature, the material will become paramagnetic.

   Correct Option: B

   For a magnetic material when temperature is raised above Curie temperature, the material will become paramagnetic.

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