Food items containg fats and oils give foul smell when left for a long time because of …………………………

Silver articles and copper articles get a black and green coating respectively when kept for a long time in air. Mentions the reason for this and identify the chemical name of the coating in each case.

Oil and fat containing food items are flushed with nitrogen why?

Assertion : Fats and oils are one of the main sources of food for all living organisms. Reason =: Lipids act as energy reserves.

Fats are oils containing foods,when kept for long time then what change take place in items?What is name of this process?

As shown in the figure P and Q are two coaxial conductint loops separated by some distance. When the switch S is clossed, a clockwise currrent I_p flows in P (As seen by e) and an induced current I_(Q1) flows in Q. The switch remains closed for a long time. When S is opened, a current I_(Q2) flows in Q Then the direction of I_(Q1) and I_(Q2) (as seen by E) are