chem: shocking

[YuriGagarin]

the answer to this question is D. its is so irrelevant

 

[Zishi]

I thought Iodine vapours were supposed to be purple?

I would've gone for option C, can anybody explain why C would be wrong at room temperature?

From my own practical experience, Bromine DOES vaporize significantly under room temperature - so C is wrong. The correct answer is B - mark scheme's answer, D, is wrong.

 

[kakarocks]

If i remember correctly , i've done this question the answer is b anyway and it's b in the markscheme as well i believe

 

[Zishi]

http://www.xtremepapers.me/CIE/International%20A%20And%20AS%20Level/9701%20-%20Chemistry/9701_w10_ms_12.pdf

Markscheme and Examiner Report both say D, and the examiner report doesn't even comment on the question!

I realize that B can possibly be the correct answer, but for option C, so are you saying that Bromine tends to exist in gaseous form at room temperature?

No, I'm not saying that. It exists as liquid at room temperature, but whenever we open the cap of its container, we readily can see red-brown fumes of it. The option says that bromine will NOT vaporize significantly at room temperature - which Is wrong. If you're still going to school/college then you may ask Lab assistants to show you a container having bromine, then you can easily understand what happens.

 

[princesszahra]

the answer to this question is D. its is so irrelevant

the answer is B!!
A cannot be the ans cuz bromine is soluble in CBr4 which is a non polar solved(ull learn in organic chem A2)
B density of bromine is more than that of air ( chk wikipedia) C and D are wrong too! markscheme may be wrong ! they r wrong in many cases , this is not the first time everu!so relax!

 

[DragonCub]

The answer should be B, I think too.

For A, Bromine gas itself is non-polar, so it definitely CAN dissolve in non-polar solvents. A is wrong.
For B, according to the ideal gas law, 1 mole of any gas at RTP occupies the same volume (24 dm^3). On the other hand, The average molar mass of air is approximately 29 while that of Br2 is 100+, Bromine gas is denser than air. B is right.
For C, bromine is volatile. C is wrong.
For D, the purple gas is iodine and bromine gas' colour is not that deep. D is wrong.

I agree that B is the correct answer. MS is wrong.

 

[Youme&I]

The answer should be B, I think too.

For A, Bromine gas itself is non-polar, so it definitely CAN dissolve in non-polar solvents. A is wrong.
For B, according to the ideal gas law, 1 mole of any gas at RTP occupies the same volume (24 dm^3). On the other hand, The average molar mass of air is approximately 29 while that of Br2 is 100+, Bromine gas is denser than air. B is right.
For C, bromine is volatile. C is wrong.
For D, the purple gas is iodine and bromine gas' colour is not that deep. D is wrong.

I agree that B is the correct answer. MS is wrong.

Dragon Cub is right, dont trust the marking scheme fully. They maybe mistyped