November 2011 - Chemistry Subject Test

warsovereign
Sun, 06 Nov 2011 07:49:49 +0000

@crisronaldo : I put in TT without CE, that is hydrogen gas is both less dense than air and can be collected by water displacement. But I want to clarify one point, that the density is absolutely one of the considerations of air or water displacement of gas. Because if a gas is more dense than the medium, say air displacement of xenon gas, is not feasible. But it xenon gas soluble in air? Absolutely not. Solubility is of course another consideration, but it has nothing to do with the judgment involving this question.