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Graphite is used as anode but diamond is...

Graphite is used as anode but diamond is not.
There exist free electrons between two parallel sheets of graphite, hence it helps in electrode conduction.

A

If both (A) and ( R) are correct and ( R) is the correct explanation of (A).

B

If both (A) and ( R) are correct, but ( R) is not the correct explanation of (A).

C

If (A) is correct, but ( R) is incorrect.

D

If (A) is incorrect, but ( R) is correct.

Text Solution

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The correct Answer is:
A
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CENGAGE CHEMISTRY-GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF ELEMENTS-Exercise (Assertion-Reasoning)
  1. Assertion: All minerals are ore. Reason: Ores are minerals from whic...

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  2. Argentite ore is concentrated by froth flotation process. Argentite ...

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  3. All metals cannot be obtained by carbon reduction. Carbon is a very ...

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  4. Assertion: Durig calcination the ore is heated well below its melting ...

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  5. Oxygen is the most abundant element. Aluminium is the most abundant ...

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  6. A: Highly electropositive metals are extracted by electrolysis of thei...

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  7. Zone refining is used to obtain metals in high degree of purity. Dur...

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  8. Assertion :Ti can be purified by Van Arkel process. Reason: TiI(4) ...

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  9. Assertion: Aluminothermy is used for extraction of chromium form chrom...

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  10. Assertion: Ag and Au are extracted by leaching the ores with a dilute ...

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  11. By froth flotation process, carbonate and hydroxide ores are concentra...

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  12. Standard free energy of formation for Al(2)O(3) and Cr(2)O(3) at 1273 ...

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  13. Metals of high purity are obtained by zone refining. Impurities are ...

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  14. Assertion: Nickel is purified by reaction it with CO. Reason: Impur...

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  15. During reduction of ZnO to Zn, C is more efficient than CO. The stan...

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  16. Graphite is used as anode but diamond is not. There exist free elect...

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  17. Silver may be prepared by using silver coins. In this process, coins a...

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  18. Reduction of Fe(2)O(3) with CO is done below 710^@C. Delta(f) G^(Ө) ...

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