86. In Goldschmidt aluminothermic process, reducing agent is

1. 1. Coke

   
   
   

   2. Na

   
   
   

   3. Al-powder

   
   
   

   4. Cu

   
   
   

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   NA

   Correct Option: C

   NA

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87. Silicon is the constituent of

1. 1. Rocks

   
   
   

   2. Alloys

   
   
   

   3. Animals

   
   
   

   4. Plants

   
   
   

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   NA

   Correct Option: A

   NA

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88. The element which is not a liquid at room temperatre (30^°C) is

1. 1. Hg

   
   
   

   2. Ga

   
   
   

   3. Br

   
   
   

   4. Ge

   
   
   

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   NA

   Correct Option: D

   NA

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89. Which of the following alkaline earth metals has the highest ionic mobility in an aqueous solution ?

1. 1. Ba²⁺

   
   
   

   2. Mg²⁺

   
   
   

   3. Ca²⁺

   
   
   

   4. Be²⁺

   
   
   

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   NA

   Correct Option: A

   NA

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90. Stainless steel contains

1. 1. Fe + Cr + Ni

   
   
   

   2. Fe + Ni + Cu

   
   
   

   3. Fe + Cr + Cu

   
   
   

   4. Fe + C + Ni

   
   
   

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   NA

   Correct Option: A

   NA

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