5
Given below are two statements
Statement (I) : The non-polar hydrocarbon chain of fatty acids accounts for their poor solubility in organic solvents
Statement (II) : The longer the fatty acyl chain and fewer the double bonds; the lower the solubility in water.
In light of the above statements, choose the most appropriate answer from the options given below.
EXPLANATION
Carbohydrates & Lipids
- Statement (I) is False: The hydrophobic, non-polar hydrocarbon tail of fatty acids provides high solubility in non-polar organic solvents (chloroform, hexane, diethyl ether, benzene) and explains their insolubility in polar aqueous solutions.
- Statement (II) is True: As fatty acyl chain length increases and degree of unsaturation decreases, hydrophobic surface area increases and crystal packing tightens, progressively decreasing solubility in water.
- Conclusion: Statement (I) is false but Statement (II) is true.
Correct option: (4) Statement (I) is false but Statement ({I) is true.
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