DOUBTS on Chemistry P12 (confusions)

[Shoaib_rockz]

rate of reverse reaction should equal forward reaction.
amount of products and reactants to be same

I gave all three right..as concetration of reactants and products should be same as well.

 

[Shoaib_rockz]

physics pleeeeeaaaasssseeeeee

I got the powerstation one 1.5 or sth..did wrong in crystalline material one..btw about chem..what did you get the answer for methanol enthalpy one..C?

 

[Muhammad Haris Ghani]

ok what was your answer for ppt one was it Mg or Ba

 

[Muhammad Haris Ghani]

I got the powerstation one 1.5 or sth..did wrong in crystalline material one..btw about chem..what did you get the answer for methanol enthalpy one..C?

sorry bro didnt remember but you should use the mass of water

 

[Muhammad Haris Ghani]

I think correct option was B what was your option for planet one and 9th equilibrium one

 

[beeloooo]

planet one was C and its answer was Saturn. and dynamic equilibrium one was C the second and 3rd option as the concentration needs to be the same and the rate of forward and backward reaction is same. but the amounts do not need to be same.

 

[Shoaib_rockz]

ok what was your answer for ppt one was it Mg or Ba

Ba because Barium sulfate is insoluble.

 

[Namehere]

planet one was C and its answer was Saturn. and dynamic equilibrium one was C the second and 3rd option as the concentration needs to be the same and the rate of forward and backward reaction is same. but the amounts do not need to be same.

Equilibrium constants are constant at constant temperature, the question asked what would happen if you increase/decrease the temperature, hence the equlibrium constant changes, I think...

 

[Rahi Khan]

wana discuss physics

sure
wht abt phy???

 

[Rahi Khan]

m

rate of reverse reaction should equal forward reaction.
amount of products and reactants to be same[/quote
may b i gave the ans C

 

[beeloooo]

Equilibrium constants are constant at constant temperature, the question asked what would happen if you increase/decrease the temperature, hence the equlibrium constant changes, I think...

you are right but maybe ur talking about some other mcq.

 

[snowbrood]

planet one was C and its answer was Saturn. and dynamic equilibrium one was C the second and 3rd option as the concentration needs to be the same and the rate of forward and backward reaction is same. but the amounts do not need to be same.

do u know at what number was that dynamic question

 

[beeloooo]

do u know at what number was that dynamic question

yeah it was 32 in section B

 

[Namehere]

you are right but maybe ur talking about some other mcq.

Talking about same question as you, I answered A

 

[shahid.k]

guys do any of u remember.. the answer to the graph which said what will happen if the temperature rises or something? :/ i dont remember the question very well... it had four graphs! rate of reaction related maybe :/ in chemistry paper 1

 

[Namehere]

Do you mean the graph of the autocalysed reaction? If you mean that I answered B.

 

[beeloooo]

if

guys do any of u remember.. the answer to the graph which said what will happen if the temperature rises or something? :/ i dont remember the question very well... it had four graphs! rate of reaction related maybe :/ in chemistry paper 1

if you mean that boltzman graph mcq number 6. which had temperature -10 and -20 its option was D!

 

[Nisa Mirza]

what was your answer for planet question one my was D uranis

yeah i went with D uranus

 

[Nisa Mirza]

Do you mean the graph of the autocalysed reaction? If you mean that I answered B.

was that the one where it increased steeply and then leveled off with the uncatalysed reaction?? not sure what option that was but might have been C.

 

[Nisa Mirza]

rate of reverse reaction should equal forward reaction.
amount of products and reactants to be same

amount of products and reactants do not have to be the same.. Do they??