Chemistry: Post your doubts here!

[Rizwan Javed]

Yes, please. Give the toughest MCQ you have! I really want something TOUGH.

It isn't tough though, but tricky. Many people got this wrong:

 

[funky brat]

here's the question Rizwan Javed

 

[Dark Destination]

It isn't tough though, but tricky. Many people got this wrong:

View attachment 60526

D. I just tested the different equations one by one.
Putting R concentration as X, and then finding the other equilibrium concentrations.

 

[Rizwan Javed]

View attachment 60527
here's the question Rizwan Javed

It would be C. Since there're no H-Bonds in aldehyde (ethanal is an aldehyde), so there won't be any sharp and broad peak b/w 2500–3300 cm–1 OR b/w 3230–3550 cm–1 which are caused by Carboxylic acid and Alcohol groups respectively. In C, there's a sharp, narrow peak at 1680–1750 cm–1 which is characteristic of aldehydes, because they don't have H-Bonds. So C represents this given aldehyde.

 

[Rizwan Javed]

D. I just tested the different equations one by one.
Putting R concentration as X, and then finding the other equilibrium concentrations.

It's correct.

 

[Dark Destination]

It's correct.

Lol, what? That's the toughest MCQ there is?

 

[Rizwan Javed]

Lol, what? That's the toughest MCQ there is?

That wasn't toughest, I said already. Okay wait, another one. I don't remember in which year that came but I'll search that.

 

[Dark Destination]

That wasn't toughest, I said already. Okay wait, another one. I don't remember in which year that came but I'll search that.

Ohkay. Let's see.

 

[Rizwan Javed]

Ohkay. Let's see.

I don't seem to find that :/ In the mean time, solve this

 

[ahmedish]

J13 QP 51
1) a) ii)
Whats the ideal way to draw the graph?
The ER says The correct prediction of a straight line or curve of negative gradient with no plateau was given by many and received credit. How do I draw such curve without a plateau? I always drew mine with a plateau

 

[Dark Destination]

I don't seem to find that :/ In the mean time, solve this

B? I can't recall the exact equation for reduction of MnO4- but I guessed some stuff, and came up with B. Is it correct?

 

[Rizwan Javed]

B? I can't recall the exact equation for reduction of MnO4- but I guessed some stuff, and came up with B. Is it correct?

Answer's correct.

 

[Dark Destination]

Answer's correct.

 

[Rizwan Javed]

Sad? :O

 

[Dark Destination]

Sad? :O

Cause you gave another easy one

 

[Rizwan Javed]

Cause you gave another easy one

Lol, what can I do when CIE people give only easy questions in MCQs Infact, MCQs are the easiest of all papers :3

 

[Dark Destination]

Lol, what can I do when CIE people give only easy questions in MCQs Infact, MCQs are the easiest of all papers :3

There must be SOME tough MCQ's. :/

 

[funky brat]

Lol, what can I do when CIE people give only easy questions in MCQs Infact, MCQs are the easiest of all papers :3

I beg to differ.
MCQs require a lot if concentration because they trick you into the wrong options especially when you have an attention span of a goldfish as I do.

 

[Dark Destination]

I beg to differ.
MCQs require a lot if concentration because they trick you into the wrong options especially when you have an attention span of a goldfish as I do.

Do you have any tough MCQ's?

 

[funky brat]

Do you have any tough MCQ's?

Lol I find 50% of the MCQs hard.