Question

Which of the following fatty acids would you expect to have the lowest melting point? A нс ОН B нэс он с нэс он D он сн. ol. A o II, В o 11. С O IV.D

Answer 1

an * Meeting Point of fatty acid increases with increasing Carbon number. Meeting point of saturated fatty acid is higher than unsaturated fatty acid with same number of carbon In the giren fatty acid A & B fatty acid A number of carbon than B, so the Mop. of Ais more than B have more * Double bonds lower the Melting point relative to Saturated fatty acid. * In the fatty acid c&D, Number of carbon and unsaturation is same in both but one is in cis and other is in trans form, * Trans isomer Pack better than is isomer. & The Poor packing in the cis somer means that the intermolecular forces aren't as effective as they have to be so Cis-isomer have how melting point than trans isomer. * fatty acid C is trans isomer & fatty acid arid D is cis isomer. of starting A, B are saturated fally acid so they have high Mop. than c&o. In c&D, the bis cis isomer and is trans isomer iso D is having lowest Mop.. C The anlawesith M.p. in the following fatty acid is a CamScanner

Melting point of saturated fatty acids is higher than the unsaturated fatty acid with same number of carbon .

Starting A and B fatty acids are saturated so they have the highest melting point than , C and D unsaturated fatty acids.

The C is trans isomer and D is cis isomer , with same number of carbon.

Cis isomer have the low melting point than the trans isomer . So the decreasing order of melting point in the following is ,

A > B > C > D

The fatty acid with lowest melting point is D

Correct option is = lV