Find Acid value of vegetable oil whose 5 ml requires 2ml of N/100 KOH during titration. State whether the blend can still be useful for lubrication. (density of oil is o.89)

Weight of oil = volume of oil in ml X density

= 5 X 0.92

= 4.60 gm

Acid value = Volume of KOH X N KOH X 56 /weight of oil

= 2 x 0.01 x 56 /4.60

= 0.243 mg of KOH /gm of oil

As acid value is more than 0.1 mg/gm oil is not suitable for lubrication