Biology; Chemistry; Physics: Post your doubts here!

[***amd***]

In the o level biology exam yesterday they asked the harm if a low or high urine producing drink is drunk .A produces high urine while C soft drink produces low urine . which is harmful in hot environment ? More urine (as more water will be lost and body cells will crenate ) or low urine production as urine will be concentrated leading to urination infection ????

GUYZ!

 

[Faizan Muhammmad]

In the o level biology exam yesterday they asked the harm if a low or high urine producing drink is drunk .A produces high urine while C soft drink produces low urine . which is harmful in hot environment ? More urine (as more water will be lost and body cells will crenate ) or low urine production as urine will be concentrated leading to urination infection ????

we have been fighting for a long time
no definite solution is there

 

[someperson]

i have a question.
what does it mean when exothermic reactions prefer low temperatures, like what i understand is that they go faster when the temperature is lower. but when we provide a reaction with heat, it goes faster. and most reactions are exothermic (prefer low temperatures) so what is that supposed to mean. i mean it's contradictory

 

[Faizan Muhammmad]

GUYZ!

the timing couldnt be more perfect

 

[funky brat]

In the o level biology exam yesterday they asked the harm if a low or high urine producing drink is drunk .A produces high urine while C soft drink produces low urine . which is harmful in hot environment ? More urine (as more water will be lost and body cells will crenate ) or low urine production as urine will be concentrated leading to urination infection ????

POST OF THE DAY. KHEKHEKHE.

 

[exploded diper]

in this question do we right 2, 8,3 or draw the structure

 

[Hazel-logy]

We should all wait for the marking scheme

 

[exploded diper]

i have a question.
what does it mean when exothermic reactions prefer low temperatures, like what i understand is that they go faster when the temperature is lower. but when we provide a reaction with heat, it goes faster. and most reactions are exothermic (prefer low temperatures) so what is that supposed to mean. i mean it's contradictory

it doesnt decrease the rate of reaction but it favours the backward reaction which is endothermic......

 

[someperson]

We should all wait for the marking scheme

we wouldn't care about it then

 

[funky brat]

i have a question.
what does it mean when exothermic reactions prefer low temperatures, like what i understand is that they go faster when the temperature is lower. but when we provide a reaction with heat, it goes faster. and most reactions are exothermic (prefer low temperatures) so what is that supposed to mean. i mean it's contradictory

Reactions do go faster like every type of reaction but in reversible reaction, one is exothermic and the other is endothermic. So if the forward reaction is exothermic and you increase the temperature then to maintain the temperature the equlibrium shifts to the back and more product is broken down as that reaction is endothermic.

 

[Faizan Muhammmad]

And we have some peace finally

 

[someperson]

Reactions do go faster like every type of reaction but in reversible reaction, one is exothermic and the other is endothermic. So if the forward reaction is exothermic and you increase the temperature then to maintain the temperature the equlibrium shifts to the back and more product is broken down as that reaction is endothermic.

oh now i get it, thanks

 

[asadalam]

i have a question.
what does it mean when exothermic reactions prefer low temperatures, like what i understand is that they go faster when the temperature is lower. but when we provide a reaction with heat, it goes faster. and most reactions are exothermic (prefer low temperatures) so what is that supposed to mean. i mean it's contradictory

In REVERSIBLE reactions increase in temp favours endothermic path,so in exo reactions low temp produces more yield

in this question do we right 2, 8,3 or draw the structure

View attachment 42740

Draw

 

[funky brat]

in this question do we right 2, 8,3 or draw the structure

View attachment 42740

 

[asadalam]

Wow,such skill,much chemistry,very ms paint

 

[funky brat]

Wow,such skill,much chemistry,very ms paint

Explains much why I had such a fazool paper.

 

[exploded diper]

Explains much why I had such a fazool paper.

hehe

 

[Uchiha-Sasuke]

Q 10 b) ii) please
http://papers.xtremepapers.com/CIE/Cambridge International O Level/Physics (5054)/5054_w07_qp_2.pdf
MS says "resistance increases at higher p.d. (not resistance increases)"
well, resistance is the gradient here and it's apparently decreasing -_-

 

[Abdul Hanan]

For all the people in the drinks argument;
SIR IMRAN MERCHANT said that the"DRINK C" is the right option

 

[***amd***]

For all the people in the drinks argument;
SIR IMRAN MERCHANT said that the"DRINK C" is the right option

lol, let him say that. even A can also be right.