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Two test tubes. 'A' and 'B' contains iro...

Two test tubes. 'A' and 'B' contains iron nails. In 'A' test tube iron nail is half dipped with water and in 'B' test tube iron nail is completely dipped in water and some oil also added. Then

A

Both nails in A and B undergo rusting

B

Nail in Both A and B do not undergo rusting

C

Nail in 'A' rusts but not in 'B'

D

Nail in 'B' rusts but not in 'A'

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VGS PUBLICATION-BRILLIANT-PRINCIPLES OF METALLURGY-EXERCISE
  1. What will happen if a stainless steel rod placed in moisture air ?

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  2. There is metal oxide on a tool. The tool is made with

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  3. Two test tubes. 'A' and 'B' contains iron nails. In 'A' test tube iron...

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  4. Extract Na from NaCl, we obtain Na at

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  5. i) Bauxite (Al2O3 * 2H2O) ii) Copper iron pyrites (CuFeS2) iii) Gypsum...

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  6. Which of the following is not a mineral for iron metal ?

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  7. Which of the following undergoes an auto (self) reduction ? i) PbO i...

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  8. The process in which the ore is mixed with flux and fuel and strongly ...

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  9. Which of the following is not used to purification of a metal ?

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  10. Which of the following metal is low reactivity metal ?

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  11. Which of the following method is used for purification of Zinc ?

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  12. Name few highly reactive metals, which are never found in nature in fr...

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  13. Which of the following is the correct formula of gypsum?

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  14. Which of the following is not sulphide ore ?

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  15. In which of the following method a stream of water is used ?

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  16. Which of the following is a chemical method ?

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  17. Which of the following is wrong about poling ?

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  18. Which of the following is the correct order of activities series ?

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  19. Which of the following metal is not available in native state ?

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  20. Which method is most suitable to enrich the sulphide ores ?

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