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Question

Which of the following statements is/are correct?
 
  1. Gold is mainly used in plating steel sheets with a fine layer.
     
  2. Aluminium is used in making aircrafts as it is light in weight.
     
  3. Malaysia is the leading producer of manganese.
     
  4. Copper and manganese, are both used to make alloys. 
     


Solution

The correct options are
B Aluminium is used in making aircrafts as it is light in weight.
 
D Copper and manganese, are both used to make alloys. 
 
Copper is used in making alloys like brass, bronze and German silver. Manganese is also used in making steel and in making other alloys. Tin is used for coating steel. Russsia is the leading producer of manganese. 
 

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