31. All the elements is a group in the periodic table have the same

1. 1. Atomic weight

   
   
   

   2. Same number of valence electrons

   
   
   

   3. Atomic number

   
   
   

   4. None of the above

   
   
   

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   NA

   Correct Option: B

   NA

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32. Which of the following pairs of atomic numbers, represent the elements belonging to the same group ?

1. 1. 15 and 13

   
   
   

   2. 12 and 21

   
   
   

   3. 14 and 31

   
   
   

   4. 13 and 31

   
   
   

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   NA

   Correct Option: D

   NA

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33. Aluminium bears a diagonal relationship with

1. 1. Beryllium

   
   
   

   2. Boron

   
   
   

   3. Carbon

   
   
   

   4. Gallium

   
   
   

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   NA

   Correct Option: A

   NA

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34. The long form of periodic table consists of

1. 1. 8 Horizontal and 7 vertical series

   
   
   

   2. 7 Horizontal and 18 vertical series

   
   
   

   3. 7 Horizontal and 7 vertical series

   
   
   

   4. 3 Horizontal and 7 vertical series

   
   
   

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   NA

   Correct Option: B

   NA

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35. Which one of the following sequence of the chemical elements is correct in terms of the descending order of atomic radius ?

1. 1. B - C- N - O

   
   
   

   2. C -B - O - N

   
   
   

   3. N - O - B - C

   
   
   

   4. O - N - C - B

   
   
   

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   NA

   Correct Option: A

   NA

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