खुली हवा में कुछ दिनों तक रखने पर चांदी की वस्तुएं निम्नलिखित में से किस यौगिक के बनने के कारण काली पड़ जाती हैं?

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?

Which gas is evolved when zinc granules react with dilute hydrochloric acid?

The blue colour of copper sulphate solution fades and changes when an iron nail is dipped in it. What type of chemical reaction is this?

The reaction between an acid and a base to give a salt and water is known as:

When water is added to quicklime, which of the following is formed?

Which type of chemical reaction involves the breakdown of a compound into two or more simpler substances?