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Which of the following statements are incorrect with respect to the allotropes of carbon? 

I) Diamond is extremely hard while graphite is soft 

II) Diamond is ionic but graphite is covalent 

III) Diamond is a non-conductor but graphite is a good conductor of electricity

IV) Diamond has a layered structure while graphite has a network structure 

  • a)
     I and II

  • b)
    I, II and IV

  • c)
    I, III and IV

  • d)
    II and IV

Correct answer is option 'D'. Can you explain this answer?
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Which of the following statements are incorrect with respect to the al...
Here the correct answer is C as in the question we can see that there is S. I. R effect so the c 1 and c5 bond lengths are of the same length and longer than the c3 bond length.... M.
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Which of the following statements are incorrect with respect to the allotropes of carbon?I) Diamond is extremely hard while graphite is softII) Diamond is ionic but graphite is covalentIII) Diamond is a non-conductor but graphite is a good conductor of electricityIV) Diamond has a layered structure while graphite has a network structurea)I and IIb)I, II and IVc)I, III and IVd)II and IVCorrect answer is option 'D'. Can you explain this answer?
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