276. Thee elements of group VA are generally known as

1. 1. Normal elements

   
   
   

   2. Transition elements

   
   
   

   3. Halogens

   
   
   

   4. Pnicogens

   
   
   

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   NA

   Correct Option: D

   NA

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277. One of the following elements does not exist as tatraatomic molecule

1. 1. N

   
   
   

   2. P

   
   
   

   3. As

   
   
   

   4. Sb

   
   
   

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   NA

   Correct Option: A

   NA

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278. The oxidation state of phosphorus varies from

1. 1. -1 to +3

   
   
   

   2. -3 to +3

   
   
   

   3. -3 to +5

   
   
   

   4. -5 to +1

   
   
   

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   NA

   Correct Option: C

   NA

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279. Which of the most metallic ?

1. 1. P

   
   
   

   2. As

   
   
   

   3. Sb

   
   
   

   4. Bi

   
   
   

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   NA

   Correct Option: D

   NA

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280. The basic structural unit in silicates is

1. 1. SiO^6-₆ ion

   
   
   

   2. SiO^2-₂ ion

   
   
   

   3. SiO^4-₄ ion

   
   
   

   4. SiO^2-₂ ion

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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