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Define the following terms. (i) Minera...

Define the following terms.
(i) Mineral
(ii) Ore
(iii) Gangue

Text Solution

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Gangue : Ores mined from the earth are usually contaminated with large amounts of impurities such as soil, sand, etc., called gangue.
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OSWAL PUBLICATION-METALS AND NON-METALS-NCERT Corner (Intext Questions)
  1. Why is sodium kept immersed in kerosene oil?

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  2. Write equation for the reaction of iron with steam.

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  3. Write equations for the reactions of Calcium and potassium with wate...

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  4. Samples of four metals A, B, C and D were taken and added to the follo...

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  5. Samples of four metals A, B, C and D were taken and added to the follo...

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  6. Samples of four metals A, B, C and D were taken and added to the follo...

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  7. Which gas is produced when dilute hydrochloric acid is added to a reac...

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  8. What would you observe when zinc is added to a solution of iron (II) s...

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  9. Write the electron dot structures of sodium, oxygen and magnesium.

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  10. Show the formation of Na(2)O and MgO by the transfer of electrons.

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  11. What are the ions present in these compounds? Na(2)O and MgO.

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  12. Why do ionic compounds have high melting points?

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  13. Define the following terms. (i) Mineral (ii) Ore (iii) Gangue

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  14. Define the following terms. Ore

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  15. Define the following terms. (i) Mineral (ii) Ore (iii) Gangue

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  16. Name two metals which are found in nature in the free state.

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  17. What chemical process is used for obtaining a metal from its oxide?

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  18. Metallic oxides of zinc, magnesium and copper were heated with the fol...

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  19. Which metals do not corrode easily?

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  20. What are alloys?

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