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Which of the following is used in thermi...

Which of the following is used in thermine welding ?

A

`TiO_ 2 + 4 Na to Ti + 2 Na _ 2 O `

B

`2Al + Fe_2 O_3 to Al _ 2 O_ 3 + 2 Fe `

C

`Sn O_2 + 2 C to Sn + 2 CO `

D

` Cr _ 2 O _ 3 + 2 Al to Al_2 O _ 3 + 2 Cr `

Text Solution

Verified by Experts

The correct Answer is:
B
` 2Al + Fe _ 2 O_ 3 to Al _ 2 O _ 3 + 2 Fe `
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PRADEEP-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS -COMPETITION FOCUS (JEE(Main and Advanced)/MEDICAL ENTRANCE SPECIAL) MULTIPLE CHOICE QUESTIONS (I)
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  2. Cryolite is:

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  3. Aluminium is extracted from Alumina (Al(2)O3 ) by electrolysis of a mo...

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  4. In the correct of the Hall-Heroult process for the extraction of Al, w...

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  5. The metal that cannot obtained by electrolysis of an aqueous solution ...

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  6. In the alumino thermite process aluminium acts as

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  7. Which of the following is used in thermine welding ?

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  8. The process of isolation of metals by dissolving the ore in a suitable...

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  9. The metal which can be used to obtain metallic Cu from aqueou...

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  10. Extraction of gold (Au) involves the formation of complex io...

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  11. Extraction of gold and silver involves leaching with CN^(-)ion.silver ...

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  12. Extraction of chlrorine from brine solution is based on

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  13. In electrorefining of copper, some gold is deposited as

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  14. During the process of electroytic refining of copper some metals prese...

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  15. In zone-refining methode the molten zone

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  16. Match items of Column I with the items of Column II and assign the co...

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  17. Which of the following pairs of metals uis purified by van arkel meth...

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  18. Van Arkel method of refining zirconium involves

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  19. Which method of purification is represented by the following equation?...

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  20. Identify the alloy containing a non metal as a constituent in it

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