Q15 of 35 Page 42

Explain rancidity. (AS1)

When we use old, left over cooking oil for making foodstuff, it is found to have foul odour called rancidity.

⇒Rancidity is an oxidation reaction.


⇒If food is cooked in such oil, its taste also changes.


⇒When oils or fats are left aside for a long time, they undergo air oxidation and become rancid.


⇒Rancidity in the food stuff cooked in oil or ghee is prevented by using antioxidants.


More from this chapter

All 35 →
13

In the refining of silver the recovery of silver from silver nitrate solution involved displacement by copper metal. Write the reaction involved. (AS1)

 14

What do you mean by corrosion? How can you prevent it? (AS1)

 16

Balance the following chemical equations including the physical states. (AS1)

C6H12O6 C2H5OH+CO2

 16

Balance the following chemical equations including the physical states. (AS1)

Fe + O2 Fe2O2