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Graphite is a soft solid lubricant extremely difficult to melt. The reason for this anomalous behaviour is
that graphite

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Important Questions on The p-Block Elements

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Alpha Question Bank for Medical: Chemistry>Chapter 18 - The p-Block Elements>Exercise 4>Q 96
The stability of dihalides of Si, Ge, Sn and Pb increases steadily in the sequence
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Alpha Question Bank for Medical: Chemistry>Chapter 18 - The p-Block Elements>Exercise 4>Q 101
The chloride that CAN NOT get hydrolysed is:
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Alpha Question Bank for Medical: Chemistry>Chapter 18 - The p-Block Elements>Exercise 4>Q 102
The element that does NOT show catenation is:
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Alpha Question Bank for Medical: Chemistry>Chapter 18 - The p-Block Elements>Exercise 4>Q 106
Which among the following factors is the most important in making fluorine the strongest oxidizing halogen
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Alpha Question Bank for Medical: Chemistry>Chapter 18 - The p-Block Elements>Exercise 4>Q 109
Identify the incorrect statement among the following. 
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Alpha Question Bank for Medical: Chemistry>Chapter 18 - The p-Block Elements>Exercise 4>Q 115
The increasing order of the first ionisation enthalpies of the elements and B, P, S and F (lowest first) is
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Alpha Question Bank for Medical: Chemistry>Chapter 18 - The p-Block Elements>Exercise 4>Q 116
Aluminium is usually found in +3 oxidation state. In contrast, thallium exists in +1 and +3 oxidation states. This is due to:
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Alpha Question Bank for Medical: Chemistry>Chapter 18 - The p-Block Elements>Exercise 5>Q 4
There is considerable increase in covalent radius from N to P. However, from Sb to Bi only small increase (of 7 pm) in covalent radius is observed. This is due to: