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![[Post New]](/templates/default/images/icon_minipost_new.gif) 21 Mar 2008 13:02:28 IST
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Q. The critical temperature of water is higher than that of O2 because the H2O molecule has. 1. fewer covalent bonds than O2 2. two covalent bonds 3. V-shape 4. dipole moment. ONLY ONE ANSWER IS CORRECT... PLZ GIVE UR ANSWER WITH COMPLETE EXPLANATION RATES ASSURED.
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PROGRESS ISN'T MADE BY EARLY RISERS OR HARD WORKERS, BUT BY LAZY PEOPLE TRYING TO FIND EASIER WAY TO DO THE SAME.....SO BE LAZZZZYY!!!! |
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4) dipole moment
van der waals constant 'a' means stronger intermolecular forces
since Tc is directly pproportional to a,
Tc of water is high due to high a
ie high value of intermolecular forces
intermolecular forces of water are much higher than of oxygen gas due to
dipole moment
hence answer is d
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21 Mar 2008 13:16:33 IST
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dude i too marked the answer as dipole moment...
but the answer is given as V-shape...
the book says that dipole moment is due to V-shape....
is the book correct....???
does dipole moment always occur in v-shape compounds...???
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PROGRESS ISN'T MADE BY EARLY RISERS OR HARD WORKERS, BUT BY LAZY PEOPLE TRYING TO FIND EASIER WAY TO DO THE SAME.....SO BE LAZZZZYY!!!! |
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21 Mar 2008 13:22:38 IST
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not necessarily...
but i think answer shd be d...
they have asked reason for high Tc and not high dipole moment
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" Always remember money isn't everything but make sure you have made a lot of it before talking such nonsense!"
- Bill Gates |
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21 Mar 2008 13:27:46 IST
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but this is also correct that dipole moment of whole molecule is
due to its shape
so i think it is more appropriate!!!!!!!!!!!!!
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<TABLE CELLSPACING="1" CELLPADDING="1" BORDER="0">
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<DIV ALIGN="right">Glitter Graphics</DIV></TD></TR></TABLE>
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21 Mar 2008 13:29:45 IST
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but how will we know that dipole moment is due to V-shape...
that too so much...???
the answer is (3) and is correct....saw it in 2 books...
are you people so sure the answer is (4)...???
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PROGRESS ISN'T MADE BY EARLY RISERS OR HARD WORKERS, BUT BY LAZY PEOPLE TRYING TO FIND EASIER WAY TO DO THE SAME.....SO BE LAZZZZYY!!!! |
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22 Mar 2008 17:55:03 IST
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well this question is kind of confusing. actually Tc is becoz of the polarity which in tern depend upon both dipole moment and shape bt yes the dipole moment of water is becoz of its shape.(ie v) The asymmetry of the water molecule leads to a dipole moment in the symmetry plane pointed toward the more positive hydrogen atoms. The measured magnitude of this dipole moment is 
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Devendra Kumar Shukla
M.Sc physical Chemistry
Currently working in Daswani classes |
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