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Assertion : Zone refining method is very...

Assertion : Zone refining method is very useful for producing semiconductors.
Reason : Semiconductors are of high purity.

A

Both assertion and reason are true and reason is the correct explanation of assertion.

B

Both assertion and reason are true but reason is not the correct explanation of assertion.

C

Assertion is true but reason is false

D

Assertion is false but reason is true.

Text Solution

Verified by Experts

The correct Answer is:
B
(b) BOth assertion and reason are true but reason is not the correct explanation of assertion.
Zone refining method is very useful for producing semiconductors of high purity as in this process pure metal crystallises while impurities pass on into adjacent molten zone when impure metal rod is heated.
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Zone refining method is used for refining

Assertion: Zone refining method is used to produce pure metals which are used as semiconductors. Reason: Semiconductors are used in highly pure form.

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NCERT EXEMPLAR-GENERAL PRINCIPLE AND PROCESSES OF ISOLATION OF ELEMENTS -General Principle And Processes Of Isolation Of Elements
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  2. Why are sulphide ores converted to oxide before reduction?

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  3. Which method is used for refining Zr and Ti? Explain with equation.

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  4. What should be the considerations during the extraction of metals by e...

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  5. What is the role of flux in metallurgical processes?

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  6. How are metals used as semiconductor refined? What is the principle of...

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  7. Write down the reactions taking place in Bast furnace related to the m...

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  8. Give two requirements for vapour phase refining.

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  9. Write the chemical reaction involved in the extraction of gold by cyan...

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  10. Match the items of Column I with item of Column II and assign the corr...

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  11. Match the items of Column I with item of Column II and assign the corr...

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  12. Match the items of Column I with item of Column II and assign the corr...

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  13. Match the items of Column I with item of Column II and assign the corr...

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  14. Match the items of Column I with item of Column II and assign the corr...

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  15. Assertion : Nickel can be purified by Mond process. Reason : Ni(CO)(...

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  16. Assertion : Zirconium can be purificed by Van Arkel method. Reason :...

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  17. Assertion : Sulphide ores are concentrated by Froth Floatation method....

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  19. Assertion : Hydrometallurgy involves dissolving the ore in a suitable ...

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