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Froth floatation process is used for the...

Froth floatation process is used for the concentration of ……………..ores.

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MODERN PUBLICATION-METALS AND NON-METALS-EXERCISE
  1. The rockey material found with ores is known as…………….

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  2. Conversion of sulphide ore into an oxide by heating in excess of air i...

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  3. Froth floatation process is used for the concentration of ……………..ores.

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  4. Cinnabar is an ore of

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  5. Name the substance oxidised, reduced, oxidising agent, reducing agent ...

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  6. Name two metals which are not corroded easily

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  7. What is rusting? What is the chemical formula of rust?

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  8. Percentage of gold in 18 carat gold is:

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  9. Name two conditions necessary for rusting of iron.

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  10. What is the composition of bronze metal alloy?

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  11. Which is the common metal in brass and bronze?

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  12. Which is the common consitutent of all amalgams?

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  13. How will you convert 24 carat gold into 22 carat gold for making ornam...

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  14. Name the consituents of stainless steel.

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  15. Decide the following pairs will react. If they react complete the rea...

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  16. Decide which of the following pairs will react. If they react complete...

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  17. Decide which of the following pairs will react. If they react complete...

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  18. Decide following pair will react. If they react complete the reaction...

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  19. Decide the following pair will react. If they react complete the react...

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  20. Decide the following pair will react. If they react complete the react...

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