1.

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Favourable conditions for formation of graphite are high pressure and low TEMPERATURE from equilibrium diamond `(d=3.5g//ml)hArr` graphite `(d=2.3g//ml),Delta=-1.9kJ//"mole"`
For reaction `N_2O_4(g)hArr2NO,(g)`, DEGREE of dissociation `(alpha)` is `sqrt(K/(4P+K_P))` where P is equilibrium pressure.
For reaction `CI_2(g)+3F_2(g)hArr2CIF_3(g),DeltaH=-329kJ` ,dissociation of `CIF_3(g)` will be favoured by ADDITON of INERT gas at constant pressure.
Reaction stops at equilibrium (microscopically).

Answer :B::C


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