V) Answer the following: 1. Carefully read the experiments given below. Identify the type of reaction taking place in each experiment and write the difference between each of them. Also, write a balanced chemical equation each type of reaction. a. Experiment-1: A piece of magnesium ribbon was burnt on a flame. As a result, white powder or ash is formed. b. Experiment-2: When an iron nail was dipped in the copper sulphate solution, the blue copper sulphate solution turned green and a brown deposit formed on the iron nail. c. Experiment-3: A solution of sodium chloride was dissolved in silver nitrate solution. As a result, white cloudy compound was formed. d. Experiment-4: Whereas when, sulphuric acid was mixed with sodium hydroxide solution, water and sodium sulphate salt were formed. Q1) Answer the following: 1. When food gets spoiled, it produces a foul smell. Shall we call this change a chemical change? 2. Is neutralisation reaction a chemical change? Explain 3. What do you understand by a Redox reaction? Explain with an example. 4. When a candle burns, both physical and chemical changes take place. Identify these changes. Give another example of a familiar process in which both the chemical and physical changes take place 5. Define a. Endothermic reaction and b. exothermic reaction 6. Why is it advisable not to shut all the doors and windows during a storm? 7. Explain how lightning takes place 8. Describe / Define the following: a. Tornado: b. Cyclone: c. Storm: 9. I kept an empty bottle made up of plastic inside a refrigerator. After a few hours, when I opened the refrigerator, I found the bottle collapsed. Explain 10. When strong / high speed wind blows, an umbrella held upright at times get upturned. Explain the reason.
Answers
Answer:
b. cyclone plx mark as brainlist 0pz
Answer:
I see from the current columns of the daily press that "Professor Plumb, of the University of Chicago, has just invented a highly concentrated form of food. All the essential nutritive elements are put together in the form of pellets, each of which contains from one to two hundred times as much nourishment as an ounce of an ordinary article of diet. These pellets, diluted with water, will form all that is necessary to support life. The professor looks forward confidently to revolutionizing the present food system."
Now this kind of thing may be all very well in its way, but it is going to have its drawbacks as well. In the bright future anticipated by Professor Plumb, we can easily imagine such incidents as the following: