Mineral oils (e.g. petroleum oils) are preferred over fatty oils (e.g. mustard oil, ghee, tallow, palm oil, olive oil etc.) as a lubricant due to its________________?

Related Mcqs:

1. Vegetable oils contain large quantity of glycerides of unsaturated acids. When the vegetable oils contain high amount of saturated fatty acids, it is termed as ____________________ oil?

   A. Drying
   B. Semi-drying
   C. Non-drying
   D. None of these

2. Oils are partially hydrogenated (not fully) to manufacture Vanaspati , because fully saturated solidified oils ?

   A. Cause cholesterol build up and blood clotting
   B. Are prone to rancid oxidation
   C. Always contain some amount of nickel (as their complete removal is very difficult)
   D. Have affinity to retain harmful sulphur compounds

3. Unsaturated oils compared to saturated oils have___________________?

   A. Lower melting point & higher reactivity to oxygen
   B. Higher melting point & higher reactivity to oxygen
   C. Lower melting point & lower reactivity to oxygen
   D. Higher melting point & lower reactivity to oxygen

4. Rancidity of the fatty oil can be reduced by its__________________?

   A. Decoloration
   B. Hydrogenation
   C. Oxidation
   D. Purification

5. Catalyst used during the manufacture of ‘Vanaspati Ghee’ is ___________________?

   A. Zinc
   B. Nickel
   C. Platinum
   D. Copper

6. Which oil is preferred for paint manufacture ?

   A. Drying oil
   B. Non-drying oil
   C. Semi-drying oil

   D. Saturated oil

7. Which of the following is a bleaching agent added in the detergents to facilitate removal of stains caused due to blood, tea etc ?

   A. Sodium silicate
   B. Sodium borate
   C. Sodium tripolyphosphate (STPP)
   D. Caustic soda

8. The basic constituent of vegetable oils is ___________________?

   A. Triglyceride
   B. Fatty acids
   C. Fatty alcohol
   D. Mono esters

9. Which one of the following is not likely to be a constituent of vegetable oils ?

   A. Citric acid
   B. Oleic acid
   C. Stearic acid
   D. Glycerol

10. Hydrogenation of vegetable oils is a/an _______________ reaction ?

    A. Endothermic
    B. Autocatalytic
    C. Exothermic
    D. Homogenous