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Q.

Densities of diamond and graphite are 3.5 and 2.3 g/mL.

C (diamond) ⇌ C (graphite) ∆H = -1.9 kJ/mole

Favourable conditions for formation of diamond are:

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a

low pressure and low temperature

b

high pressure and high temperature

c

low pressure and high temperature

d

high pressure and low temperature

answer is C.

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Detailed Solution

Since Graphite to diamond conversion is also an endothermic reaction. It will therefore be preferred at high temperatures and pressure.

So, option C is correct.

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