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What is roasting in metallurgy ?...

What is roasting in metallurgy ?

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The sulphide ores are converted into oxides by heating strongly in the presence of excess air.
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CPC CAMBRIDGE PUBLICATION-MARCH - 2019 QUESTION PAPER - 10-QUESTIONS
  1. What are fossils ?

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  2. Convex mirror is commonly used as rear view mirror in vehicles. Why?

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  3. What is roasting in metallurgy ?

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  4. Observe the given figure. Name the eye defect indicated in the figue s...

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  5. What is Tyndall effect ?

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  6. Under what condition lactic acid is produced in the muscle cells ?

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  7. Draw the diagram of an electric circuit in which the resistors R(1),R(...

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  8. Name the brown fumes liberated when lead nitrate is heated. Write the ...

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  9. Explain the process of translocation of food materials in plants.

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  10. Explain the process of digestion in the small intestine of man. Dige...

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  11. Draw the diagram of a simple electric motor. Label the following parts...

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  12. What are structural isomers? Name the first member of alkanes that sho...

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  13. Draw the diagram showing the longitudinal section of a flower. Label...

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  14. Draw the diagram of arrangement of apparatus used to show the reaction...

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  15. What are the advantages of connecting electrical devices in parallel w...

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  16. According to Joule's iaw of heating, mention the factors on which heat...

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  17. List the disadvantages of using fosil fuels.

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  18. List the advantages of 'reduce' and 'reuse' to save environment. Advan...

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  19. The focal length of a concave lens is 30 cm. At what distance should t...

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  20. Draw the diagram of the apparatus used in the electrolysis of water.

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