66. Which of the following compounds is formed in the borax bead test ?

1. 1. Metal metaborate

   
   
   

   2. Boron oxide

   
   
   

   3. Metal boride

   
   
   

   4. Metallic boron

   
   
   

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   NA

   Correct Option: A

   NA

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67. Synthetic gas is a mixture of

1. 1. Steam and carbon monoxide

   
   
   

   2. Carbon monoxide and nitrogen

   
   
   

   3. Hydrogen and methane

   
   
   

   4. Hydrogen and carbon monoxide

   
   
   

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   NA

   Correct Option: D

   NA

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68. Cryolite is mineral used for extraction of

1. 1. Ca

   
   
   

   2. Cu

   
   
   

   3. Al

   
   
   

   4. Fe

   
   
   

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   NA

   Correct Option: C

   NA

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69. Which is known as oil of victriol ?

1. 1. H₂SO₃

   
   
   

   2. H₂SO₄

   
   
   

   3. H₂SO₅

   
   
   

   4. H₂S₂O₈

   
   
   

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   NA

   Correct Option: B

   NA

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70. Which of the following is an acid ?

1. 1. B(OH)₃

   
   
   

   2. AI(OH)₃

   
   
   

   3. TI(OH)₃

   
   
   

   4. In(OH)₃

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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