Question

I don't agree with the answer of this question, help anyone? :/

Answer 1

The answer is supposed to be C but I disagree, I think it's supposed to be D, all though I'm 100% sure there is probably something I'm not looking carefully at, since these answers are marked by cambridge examers themselves. :/
what I think is that angles are supposed to be is:

3 = 180
2 = 120
1 = 109.5

Answer 2

AS they asked bond order to be in ascending order (smallest first) so according to that answer shOULd be A

Answer 3

Well, angle 3 should be less than 180, since according to VSEPR, the two lone pairs makes it bent.
But strange that they say B.

Answer 4

Or C I mean...

Answer 5

Omg @iPwnBunnies just gimme a min! you said lone pair right?

Answer 6

Yeah, the oxygen in the middle of angle 3 has two lone pairs. But it shouldn't be a huge difference in this problem.

Answer 7

LOL now I'm even more confused what answer it's supposed to be!

Answer 8

I feel like it should be A too. Very strange.

Answer 9

I know right?

Answer 10

maybe I'm probably not looking at it carefully lol ^^

Answer 11

You said the answer is C. Like, 3 should be the biggest angle. Why would it be the smallest .-.

Answer 12

no lol I think I made a mistake cause I thought it was supposed to be descending

Answer 13

for what think

Answer 14

4 bond pair should be 109.5

Answer 15

The question asks for ascending D:

Answer 16

HAHAHAHA DESCENDING ????????????????? LOL

Answer 17

3 bond pair should be 107

Answer 18

and 2 bond pair should be 104.5

Answer 19

It bends is that much. Geez. Never knew that.

Answer 20

So, 3 would be 104.5, 1 is 109.5 and 2 is 120 degrees. Strange.

Answer 21

yes!!!

Answer 22

exactly

Answer 23

coz that's what's written in my book :/

Answer 24

OMG. Of course it bends that much. The oxygen at angle 3 is still in a tetrahedral electron geometry. So the pairs decrease the regular 109.5 angle. It is C :D

Answer 25

Don't ever go with what the drawing says. Use VSEPR to analyze it :3

Answer 26

LOL >xD

Answer 27

I just solved own question
but I have no idea whom to give the medal to hahaha
coz you mentioned about the lone pairs and she mentioned about it being ascending which I probably accidentally over looked LOL

Answer 28

Oh lmao. XD
Idc.

Answer 29

I gave her a medal.

Answer 30

the right answer is C, but it's tricky because they omit the lone pairs on the oxygen. Even though it is tetrahedral, the lone pairs make the oxygen bond angle less than 109.5, and the methane bond angle is perfectly tetrahedral, making it exactly 109.5, and the carbonyl bond angle is 120. So C is definitely the correct answer

Answer 31

no, the right answer is C

Answer 32

The right answer is C because you have to have the sp2 molecular orbital last since the other two are sp3 hybridized. So you don't even have to know which one is the greater between 1 and 3 to get the right answer, provided of course that you've correctly identified the molecular orbital of course lol. =P

Answer 33

@JFraser @MarilynManson88 @Kainui thank you :D