लोहे में जंग लगने के दौरान मुख्य रूप से निम्नलिखित में से कौन सी रासायनिक प्रक्रिया होती है?

Which of the following chemical reaction processes causes fats and oils in food items to become rancid?

When Zinc reacts with Copper sulphate solution, what is the color of the copper metal deposited at the bottom of the beaker?

What is the color of the flame when magnesium ribbon is burned in air?