6. The highest oxidation state shown by any transition element is

1. 1. +8

   
   
   

   2. +7

   
   
   

   3. +6

   
   
   

   4. +2

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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7. Which of the following metals is present in brass, bronze and german silver ?

1. 1. Mg

   
   
   

   2. Cu

   
   
   

   3. Al

   
   
   

   4. Na

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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8. An extremely hot copper wire reacts with steam to give

1. 1. Cu₂O

   
   
   

   2. CuO₂

   
   
   

   3. Cu₂O₂

   
   
   

   4. CuO

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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9. Cinnabar is an ore of

1. 1. Cu

   
   
   

   2. Zn

   
   
   

   3. Hg

   
   
   

   4. Pb

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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10. Which of the following ion is colourless ?

1. 1. Cu⁺

   
   
   

   2. Ni²⁺

   
   
   

   3. Fe²⁺

   
   
   

   4. Fe³⁺

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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