I'm pretty sure the question asked which of the four would increase with a larger sample size. Uncertainty would decrease with a larger sample, so I don't think that was the correct option. The wording may be important. Reliability seems like the right one.
You're absolutely right - and looking at the question now, uncertainty cannot be right, because it MUST DECREASE if you increase sample size. I'm a little unsure if it would be reliability or precision looking at this, but I do agree, reliability seems slightly more correct.
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I would like to go through the whole booklet and at least tell you all which MCQs I agree with, unfortunately I don't have that kind of time :S So instead, I'll keep an eye on this thread, and clarify any confusions of their answers and let people know if I agree with them and explain why they're right, or let you know if I think they're wrong as well. With that in mind:
and isnt 17 A?
Yeah, as AE said, 17 should be A. I'm guess they accidentally read volume as pressure, because an increase in pressure would have the exact same effect.
SHouldn't question 19 be C?
o boy, disagreements! I agree with the answer booklet.
Remember, the y-axis says rate, not concentration. It doesn't matter whether it says rate of forward reaction, or rate of backwards reaction - because at equilibrium, the rate of the forwards and backwards reactions are equal. So, if the rate has increased, and it's because of a temperature change, the temperature HAS to have gone up. In an exothermic reaction, increase temperature = shift to left, so the solution would get darker.
Thus, the answer to 19 is B, as indicated