111. Consider the following elements
     1. cobalt
     2. phosphorous
     3. Zinc
     Which of the above elements are required for the maintaining healthy human body ?

1. 1. 1 and 2

   
   
   

   2. 2 and 3

   
   
   

   3. 1 and 3

   
   
   

   4. 1, 2 and 3

   
   
   

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   NA

   Correct Option: D

   NA

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112. The percentage of silver in german silver, is

1. 1. 0%

   
   
   

   2. 10%

   
   
   

   3. 2.5%

   
   
   

   4. 4.5%

   
   
   

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   NA

   Correct Option: A

   NA

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113. Which of the following alloys contains Cu and Zn ?

1. 1. Bell metal

   
   
   

   2. Aluminium bronze

   
   
   

   3. Brass

   
   
   

   4. Bronze

   
   
   

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   NA

   Correct Option: C

   NA

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114. The second series of transition elements starts with

1. 1. scandium

   
   
   

   2. ytterbium

   
   
   

   3. rhodium

   
   
   

   4. yttrium

   
   
   

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   NA

   Correct Option: D

   NA

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115. The general electronic configuration of transition metal is

1. 1. (n-1)p^1-6 ns²

   
   
   

   2. (n-1)d^1-10 ns¹

   
   
   

   3. (n-1)d^1-10 ns^1-2

   
   
   

   4. (n-1)d^1-10 ns⁰

   
   
   

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   NA

   Correct Option: C

   NA

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