The following are some statements regarding dissociation of lime stone according to the equation CaCO3(s)⇌CaO(s)+CO2(g);ΔH=110k.J.the reaction is carried in a closed vessel.A) The pressure of CO2 increases when temperature is increased.B) The pressure of CO2 increases when temperature is decreased.C) The pressure of CO2 remains same when volume of vessel is halved.The incorrect statements are
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a
A and B
b
B and C
c
A and C
d
All A, B, C
answer is B.
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Detailed Solution
According to Le-Chatelier's principle,addition of gaseous reactants (or) removal gaseous products favours forward reaction.the decomposition of CaCO3 is endothermic it is favoured at high temperature.If temperature increases more amount of CO2 is formed. Thus PCO2 increases.Hence A) is true B) is falseWhen volume of vessel is halved then pressure of CO2 changes. B, C are incorrect.