chapter 2

1.     One of the following conversion represents reduction process………………….

• CLO^-     =         CLO₃ ^-

•      N₂O₄     =        NO₂

• O₃  =    O₂

• H₂O₂     =         H₂O

   If an element X form the following compounds MgX₂ & AlX₃ so element X lies in group………………….

• 1A

• 1B

• 7A

• 4A

Potassium super oxide KO₂ is charcterized by containing………………..ion

• (O₂)^-2

• (O₂)^-

• (O)^-2

• (O)^-

  The no of oxygen which not bonded to hydrogen not equal the no. of oxygen bonded to hydrogen in all the following acids except……………………………

• H₂CO₃

• HCLO₃

• H₄SiO₄

• H₂SO₄

When reduction process occur so it associated with………………………………..

• Change in the structure of nucleus

• Decreasing in atomic radius

• Increasing in atomic no

• Decreasing in oxidation no

• 
• 
• 
• 

    The particle which have 36 electron& 49 neutrons& 38 protons is…………………

• X^-2

• ₄₉X

• X⁺²

• ₈₇X

   From the opposite figure so the

maximum oxidation state of this element is………..                                                        

• +5

• +6

• +7

• +8

     if the bond length in CBr₄ is 1.91^oA , where (Br – Br) = 2.28^oA& (F – F)=1.28 ^oA so the bond length in CF₄ equal………………..

• 1.14                          

• 1.41                           

• 0.77                    

• 0.64

   Which of the following elements have highest ability to lose the valence electrons………………………….

• ₂₆Fe

•  ₁₉K

• ₁₃Al

• ₃₇Rb