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Would someone mind explaining why the answer for this is C?
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for this one is the answer A ?? tell me the answer then ill explain !
Alright I understood the first one, the second one the answer is A but I'm confused as to why you can't also have hydrogen bonding with B. I know C and D are wrong.Have u read the word decreased by 10*C if not then thats the problem because in a decrease in temp. the boltzman distribution graph gets more narrower and elongated so L will definitely increase but as it gets narrower M will decrease and definitiely N is to decrease to so its C otherwise when the temp. increases graph becomes more wider and less elongated and Activation energy also increases
for this one is the answer A ?? tell me the answer then ill explain !
Alright I understood the first one, the second one the answer is A but I'm confused as to why you can't also have hydrogen bonding with B. I know C and D are wrong.
Oh I thought that H was also bonded with O in B, but we didn't cover any organic chemistry in school yet so I guess that's why I got it wrong, many thanks!Thats because in B u have another aldehyde which has a functional group of O--C--H so in this u dont have any hydrogen bonded to an electronegative element just like in the methanal they said in the question so if this is used u wont have hydrogen bonds but dipole-dipole attractions for hydrogen bonds u need either F,O and N with H so if H is with these then u have Hydrogen bonds and in A we have H with O
Yeah ! ! ! Organic is a bit difficultOh I thought that H was also bonded with O in B, but we didn't cover any organic chemistry in school yet so I guess that's why I got it wrong, many thanks!
What are the industrial uses of NaOH and Chlorine(obtained by using diaphragm cell)??
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Can someone please just check if my explanation behind this is correct or not?
The answer is D because conc. H2SO4 isn't a strong enough oxidising agent to oxidise chlorine ions, which is why the gas made is colourless HCl. However, Iodine is a weak reducing agent due to its position in the group and is oxidised by conc. H2SO4 to Iodine vapour.
And in this question, the answer is somehow D.. I know that NaI reacts with hot H2SO4 to give HI, I, H2O and H2S, so shouldn't they also be the products for the reactions between, say NaAs with H2SO4 but with As instead of I?
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Uploaded 3 more questions. In the first question, how do you deduce whether or not the reaction is endothermic or exothermic? In Q11, how do you recognise that the ions act as catalysts? Q16: how are the volumes achieved? I know how to get the molar quantities of Cl2 and H2 from their ionic equations but what about NaOH?
can someone explain to me question 4(c) of this paper. it is so confusing!
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s07_qp_4.pdf
ill do this later its such a big question but dont worry today or tomorrow it will be done or someone else will do it !Hey guys !! ive got my exams coming so i was practicing past papers so i came across a qn which i culdnt figure out so i thought you guys could help
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_w11_qp_21.pdf
its qn no 3 d
(i) Solution C has almost zero absorbance (i.e. it reflects all) of wavelength 650, which has red colored photons, so C has red colored solution (remember, color is caused by the light that is being reflected!)can someone explain to me question 4(c) of this paper. it is so confusing!
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s07_qp_4.pdf
11. when u add acid, H+ ions react with OH-, reducing their conc. so the equilibrium shifts to right, producing more HOCl.View attachment 19931View attachment 19932
Here in Q11, I don't get why the answer is A, what's the effect of acidifying on this in chemical terms? and in Q33, I know 1 is correct but for 2, when i drew the ion i had a double bond between H and S so S had only 2 lone pairs, what's incorrect here?
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Here in Q11, I don't get why the answer is A, what's the effect of acidifying on this in chemical terms? and in Q33, I know 1 is correct but for 2, when i drew the ion i had a double bond between H and S so S had only 2 lone pairs, what's incorrect here?
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