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Question 12 : When extra N H 3 NH3 is added to the following system at equilibrium: 3 H 2 ( g ) + N 2 ( g ) → 2 N H 3 ( g ) 3H2(g)+N2(g)→2NH3(g) , what happens? Concentration of hydrogen decreases, but that of hydrogen increases No change occurs In order to restore equilibrium, the reaction shifts left, toward reactants In order to restore equilibrium, the reaction shifts right, toward product Question 13 : The minimum additional energy, above the average internal energy, which the reacting molecules must possess so that their collision result in a reaction is known as Thermodynamic energy Activation energy Kinetic energy Threshold energy Question 14 : The factor that affects the rate of reaction is Catalyst All of these Temperature of the reactants Nature and concentration of the reactants
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