Chemical Bonding And Molecular Structure Question 367
Which of the following statement is true-
Options:
A) Absolutely pure water does not contain any ions
B) London forces are directly proportional to the number of loosely held electrons
C) Allene is polar due to its non-planar structure
D) $ CH_3OCH_3 $ is less volatile than $ C_2H_5OH $ due to stronger intermolecular forces.
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Answer:
Correct Answer: B
Solution:
(1) $ H_2O\rightarrow {H^{+}}+{OH^{-}} $ $ K_{w}={10^{-14}} $ at $ 25^{o} $ Even in conductive water $ (H_2O) $ is found to be dissociated into $ {H^{+}} $ and $ OH^{-} $ . (2) More the number of loosely held electrons, greater will be their tendency for being polarized and deformed, i.e., the magnitude of formal charge increases, hence London forces increase. (3) $ H_2C=C=CH_2 $ (Non planar) $ {\mu_{D}}=0 $ (4) In $ CH_3COCH_3 $ there is no H-bonding hence more volatile, while in $ C_2H_5OH $ intermolecular H-bonding is present hence less volatile, due to association.
BETA
