236. Which of the following metal has the lowest melting point?

1. 1. Antimony

   
   
   

   2. Tin

   
   
   

   3. Silver

   
   
   

   4. Zinc

   
   
   

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   NA

   Correct Option: B

   NA

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237. Which of the following chemical is added to give the blue colour to the glass?

1. 1. Cobalt oxide

   
   
   

   2. Manganese dioxide

   
   
   

   3. Tin oxide

   
   
   

   4. Calcium phosphate

   
   
   

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   NA

   Correct Option: A

   NA

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238. Polythene is:

1. 1. a polymer of ethylene

   
   
   

   2. a vulcanised rubber

   
   
   

   3. impregnated cotton

   
   
   

   4. cellulose derivative

   
   
   

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   Polythene is a polymer of ethylene.

   Correct Option: A

   Polythene is a polymer of ethylene.

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239. Ferrites are:

1. 1. Ferromagnetic

   
   
   

   2. Ferrimagnetic

   
   
   

   3. Paramagnetic

   
   
   

   4. Antimagnetic

   
   
   

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   Ferrites are ferrimagnetic.

   Correct Option: B

   Ferrites are ferrimagnetic.

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240. 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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   NA

   Correct Option: B

   NA

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