Question

One mole of a naturally occuring fat, on hydrolysis with NaOH, gave 1 mole of glycerol, together with sodium palmitate and sodium stearate in a $1:2$ molar ratio. The fat molecule is symmetrical. The structure of the fat is:

• A. $C{H}_2-OCO-C_{15}{H}_{31}$$|$
  $C{H}_2-OCO-C_{15}{H}_{31}$$|$
  $C{H}_2-OCO-C_{17}{H}_{35}$
• B. $C{H}_{2}OOC-C_{17}{H}_{35}$$|$
  $C{H}_{2}OOC-C_{17}{H}_{35}$$|$
  $CHOO{C}_2{C}_{15}{H}_{31}$
  
• C. $C{H}_{2}OOC{C}_{15}{H}_{31}$$|$
  $C{H}_{2}OOC{C}_{17}{H}_{35}$$|$
  $C{H}_{2}OOC{C}_{17}{H}_{35}$
• D. $C{H}_{2}OOC{C}_{17}{H}_{35}$$|$
  $CHOOC{C}_{15}{H}_{31}$$|$
  $C{H}_{2}OOC{C}_{17}{H}_{35}$

Answer 1

Answer: (D)

$C{H}_{2}OOC{C}_{17}{H}_{35}$

$|$
$CHOOC{C}_{15}{H}_{31}$

$|$
$C{H}_{2}OOC{C}_{17}{H}_{35}$

Among the given options, only option D represents the symmetrical triglyceride.
It is a triester of glycerol with two molecules of palmitic acid and one molecule of stearic acid.