For this question at point A would the volume have decreased (increasing pressure) and reactions shifts to the left
At point B would the temperature have decreased, and the reaction shifts to the left
At point c would some C2H6 have been added and the reactions shifts to the left
Apologies for the late reply
Volume changes - but if you're compressing the container, concentration will increase, not decrease. Hence, volume increases for the first question.
The system has to move to react to change (be very careful of this!). When the system moves one way or another, it is as a reaction to some external change in the other direction. So for the second question, when the system shifts left yet again, it is because the temperature has been modified in the other direction (ie. it has been increased). Had the temperature decreased, by LCP the system would have shifted to the right to minimise the change.
Last bit is 100% correct.
for this question
a) if the temperature is decreased would it shift to the left
if the volume of the reaction vessel is decreased, increasing pressure would it shift to the left
c) if an inert gas(neon) is added at constant volume would it shift to the right where there are more moles of gas
Try giving this one a bit more thought, a few of the same misconceptions are popping up again here. Use the advice I gave to your previous question
Why does only temperature affect kc
The equilibrium constant is constant for a constant temperature. Consider the equilibrium constant for any generic gaseous exothermic reaction - the constant will remain the same for most external changes (compression, expansion, introduction/removal of particles, etc.). The one thing that cannot be accounted for is a temperature change because a temperature change for such an exothermic reaction will cause a shift in either direction as defined by LCP (thus altering the constant, because the concentrations are different) without any original change to the concentrations. Think about it like this; if everyone wants a particular item, said item's price spikes because of the demand (sort of like LCP reacting to the change in attitude) but a change in temperature is more like jacking up the price artificially. It's not the best example but it's the first one I thought of. It will definitely help if you look at the equation for the constant more closely.