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

Related Mcqs:

1. 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

2. 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________________?

   A. Poor oxidation stability and high gum forming tendency
   B. Greater tendency of decomposition at elevated temperature
   C. Hydrolysis tendency in presence of water
   D. All A, B. and C

3. 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

4. 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

5. Commercial production of Vanaspati is done by _______________ of edible vegetable oils ?

   A. Hydrogenation
   B. Oxidation
   C. Hydrolysis
   D. Hydrocracking

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

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

7. Dry ice (solidified CO2) is used for the___________________?

   A. Storage & shipment of frozen foods and ice-creams
   B. Liquefaction of permanent gases
   C. Liquefaction of natural gas
   D. None of these

8. Essential oils are usually obtained using__________________?

   A. Steam distillation
   B. Extractive distillation
   C. Solvent extraction
   D. Leaching

9. Oils and fats are converted to soap in a process called _________________?

   A. Hydrogenation
   B. Esterification
   C. Saponification
   D. None of these

10. Flash point of most vegetable oils is about _______________ °C ?

    A. 50
    B. 100
    C. 200
    D. 300