Question

the surface tension of which of the following liquid is maximum?
a)H20
b)C6H6
c)CH3OH
d)C2H5OH

Answer 1

I guess is H20

Answer 2

yea i too but on phyics can we apply chemistry by seeing str. we can ay or here it is another concept??

Answer 3

i guess H20 have two hydrogen bonds. so, it should have the highest surface tension

Answer 4

uhmm one more correct me if i m wrong surface tension means large surface area rit so by seeing str. we can say H2O is having max. surface tension

Answer 5

No, surface tension has to do with the polarity of the molecules. H2O is polar, and so the molecules at the surface are being pulled together by electrostatic forces.
I don't think the other molecules on the list are polar (or at least as polar).

Answer 6

ok so we will consider here polarity.. ok thnx

Answer 7

That's my best guess at least. I'm a little rusty in chem, so I'm assuming the other molecules are not as polar.
Welcome!

Answer 8

hey i dont need a guess.. ok just tell me the one abu definition i told abu surface tension is it rit or wrong??

Answer 9

had a look at my new ques plz..

Answer 10

At 20C in mN/m

Surface Tension of Water: 72.80
Surface Tension of Benzene: 28.88
Surface Tension of Methanol: 22.70
Surface Tension of Ethanol: 22.10

Answer 11

how u calculate the ST of water??

Answer 12

u learned theses values??

Answer 13

During the course of Solid state physics I taught them. and remember them.
If want to calculate them then you have to perform experiments. These are experimental values. And different on different temperatures.

Answer 14

If you want to calculate surface tension. then may be i could help you. Now.

Answer 15

ah.. not intersted in physics just doing my hw :) so i was thinking why dats y i asked thnx

Answer 16

hmmmm....... well jesa ap chahen madam.

Answer 17

lolz.. no madam plz.. better cal me kirti or heena

Answer 18

ok heena. sorry. may i ask you something if you don't mind. please.

Answer 19

ok now there are two buble of diff. radii .the exces presure outside to inside is??
a)more in big drop
b)more in small drop
c)equal in both
d)there is no excess pressure inside the drops

Answer 20

yea sure say?

Answer 21

let me analyze the situation. wait

Answer 22

ok i got the answer.

From the concept of Buoyant force. Bigger area receive more pressure then small. so a) is correct.

Answer 23

ans is B now find the reason

Answer 24

do you know the formula of pressure? it is
P=F/A
less area receive more pressure.
more area receive less pressure.

Answer 25

Yeah I know.
I made mistake up there. Therefore i used formula here. kindly correct. it is supposed to be b).

Answer 26

now it is clear to you? heena or kirti.

Answer 27

oh yes so easy dumbo me nevr use mind well anyway thx...

Answer 28

my pleasure.