81. In Which one of the following mountain ranges of South Africa, are the world's greatest goldfields located ?

1. 1. Roggeveldberg

   
   
   

   2. Groot Swartberg

   
   
   

   3. Witwatersrand

   
   
   

   4. Drakensberg

   
   
   

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   NA

   Correct Option: D

   NA

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82. Which of the following is not a metallic mineral ?

1. 1. Hematite

   
   
   

   2. Bauxite

   
   
   

   3. Gypsum

   
   
   

   4. Limonite

   
   
   

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   NA

   Correct Option: C

   NA

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83. Though the countries of South-West Asia have abundant power resources, they have not developed major industries mainly because

1. 1. They do not have raw materials

   
   
   

   2. They do not have a large market

   
   
   

   3. They do not have skilled labour

   
   
   

   4. They do not have capital

   
   
   

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   NA

   Correct Option: A

   NA

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84. Minerals associated with sedimentary rocks are

1. 1. Magnesium and potassium

   
   
   

   2. Graphite and sulphur

   
   
   

   3. Mica and Asbestos

   
   
   

   4. Coal and oil

   
   
   

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   NA

   Correct Option: A

   NA

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85. Main income of Bolivia depends on the export of

1. 1. Tin

   
   
   

   2. Xinc

   
   
   

   3. Copper

   
   
   

   4. Lead

   
   
   

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   NA

   Correct Option: A

   NA

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