Biology; Chemistry; Physics: Post your doubts here!

[Dashing Cancerian]

what's the effect of pressure on boiling point ?

it increases the b.p

 

[Fallen316]

it increases the b.p

explain.

 

[Dashing Cancerian]

explain.

see the pressure exerted on the molecules will not let the liquid to escape easily... the energy required to overcome that pressure will increase which will increase the boiling point....

 

[sunflower789]

i have one for reactivity series aswell
though its senseless!
POPULAR SCIENTIST CAN MAKE A ZOO IN LESS HUMID CLIMATE SATISFACTORY
POTASSIUM_SODIUM_CALCIUM_MAGNESIUM_ALUMINIUM_ZINC_IRON_LEAD_HYDROGEN_COPER_SILVER
buh it works!

i hav one too of the complete reactivity series!

K: kitty
Na: never
Ca: called
Mg: monkey
Al :at
(C): cambiam
Zn: zoo
Fe: for
Sn: some
Pb: purpose
(H): however
Cu: cute
Hg: horses
Ag: are
Au: always
Pt: pretending

 

[rabiafarooq101]

http://www.xtremepapers.com/papers/...onal O Level/Physics (5054)/5054_s08_qp_1.pdf
help in mcq no 8

 

[Dukeofwin]

see the pressure exerted on the molecules will not let the liquid to escape easily... the energy required to overcome that pressure will increase which will increase the boiling point....

ALSO,
when pressure increase volume decreases thus the molecules strike with more kinetic energy and transferring their energy to other molecules which in turn makes them escape.

 

[Acer]

Thanks alot ashiqbal and salmanpakrocks )

 

[rabiafarooq101]

http://www.xtremepapers.com/papers/...onal O Level/Physics (5054)/5054_s08_qp_1.pdf
help in mcq no 8

 

[Fallen316]

http://www.xtremepapers.com/papers/...onal O Level/Physics (5054)/5054_s08_qp_1.pdf
help in mcq no 8

its A, dont ask me how

 

[rabiafarooq101]

its A, dont ask me how

I know its a but how?? cant help asking

 

[Dukeofwin]

its A, dont ask me how

lol!
this mcq cant be explained through writing!

 

[luckywang]

http://www.xtremepapers.com/papers/CIE/Cambridge International O Level/Physics (5054)/5054_s08_qp_1.pdf
help in mcq no 8

0.3x2=0.6n... then it will turn clockwise so answer is A!

 

[rabiafarooq101]

0.3x2=0.6n... then it will turn clockwise so answer is A!

thanx

 

[luckywang]

what is p.d.s in C.R.O.? help pls...

 

[kitecrystal]

http://www.xtremepapers.com/papers/...onal O Level/Physics (5054)/5054_s08_qp_1.pdf
help in mcq no 8

here pivot is Q and clockwise moment(distance QC *weight of lamina) will balance it.

 

[Dukeofwin]

Please explain the question attached!

 

[A star]

see the pressure exerted on the molecules will not let the liquid to escape easily... the energy required to overcome that pressure will increase which will increase the boiling point....

another Please Send Cats Monkeys And Zebras In Large High Cages Make Sure Padlocked.

 

[ashiqbal]

A general Pardon from everyone to whom I gave the wrong answer! Sorry for using my guesswork and leading you people to confusion!
No more MCQ replies form my side now!

Contract------ Signed!

NO NO... we are waiting for your responses, it doesnt matter if you got it wrong once, i have spent pages on this thread arguing about a topic and finally found out i was wrong!

 

[kitecrystal]

Please explain the question attached!

can u convert it to pdf?i can't open it..

 

[convent2012]

another Please Send Cats Monkeys And Zebras In Large High Cages Make Sure Padlocked.

my teacher told me same