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Assertion (A) : Graphite is soft while ...

Assertion (A) : Graphite is soft while diamond is very hard .
Reason (R) : Graphite has a three -dimensional structure while diamond has planer struture .

A

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

B

If both (A) and (R) are correct and (R) is not correct explanation of (A)

C

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

D

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

Text Solution

Verified by Experts

The correct Answer is:
C
Correctreason : Grphite has a layer -like structure, whereas diamond has a three-dimensional structure .
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CENGAGE CHEMISTRY ENGLISH-P-BLOCK GROUP 14 - CARBON FAMILY-Exercises (Assertion-Reasoning)
  1. Assertion: Pb^(4+)can be reduced easily to Pb^(2+). Reason: Pb^(2+) ...

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  2. Assertion (A) : PbI4 is a stable compound . Reason (R) : Iodide ion...

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  3. Assertion: SiF(6)^(2-) is known but SiCl(6)^(2-) is not. Reason: Siz...

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  4. Assertion (A) : Silicones are hdyreopbhobic in nature . Reason (R) ...

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  5. Assertion (A) : SnI4 is an orange solid . Reason (R) : The colur a...

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  6. Assertion (A) : Graphite is a good conductor of heat and electricity ...

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  7. Assertion : Carbon monoxide is a poisonous gas Reason : Carbon monox...

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  8. Assertion (A) : Carbon forms a large number of compounds . Reason ...

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  9. Assertion (A) : Both CO2 snd SiO2 have same structure . Reason (R)...

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  10. Assertion (A) : Lead leaves a black amrek on paore Reason (R) : Le...

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  11. Assertion (A) : CO2 is linear Reason (R) : C is not in sp- hybridi...

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  12. Assertion (A) : Maximum covalency of carbon is four . Reason (R) : ...

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  13. Assertion (A) : Graphite is soft while diamond is very hard . Reaso...

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  14. Assertion (A) : Silica is soluble in HF. Reason (R) : SiO2 + 4HF ...

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  15. Assertion (A) : Graphite is chemically more reactive than diamond . ...

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  16. Assertion (A) : The compound (CF3)3 N shows almost no basic character...

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  17. Assertion (A) : When CO2 is passed through lime water the solution tu...

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  18. Assertion (A) : SnCl2 has high meling point , whereas snCl4 has low m...

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  19. Assertion (A) : C Cl4 is inert towards hydrolysis but SiCl4 is readi...

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  20. Assertion (A) : Aluminum is passive towares conc HNO3 Reason (R) ...

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