286. Silicon is the constituent of

1. 1. Rocks

   
   
   

   2. Alloys

   
   
   

   3. Animals

   
   
   

   4. Plants

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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287. In Goldschmidt aluminothermic process, reducing agent is

1. 1. Coke

   
   
   

   2. Na

   
   
   

   3. Al-powder

   
   
   

   4. Cu

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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288. Which of the following acts as an antidote to HgCl₂ poisoning ?

1. 1. Yellow of egg

   
   
   

   2. egg of fish

   
   
   

   3. white of egg

   
   
   

   4. egg

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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289. Misch metal is widely used in the manufacture of which of the following ?

1. 1. material of car brake

   
   
   

   2. somke detectors

   
   
   

   3. cigaratte lighters

   
   
   

   4. Emergency light

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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290. Mohr's salt on oxidation with conc HNO₃ is

1. 1. Neutral

   
   
   

   2. Basic

   
   
   

   3. Amphoteric

   
   
   

   4. Acidic

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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