READ THE PASSAGE AND WRITE THE ANSWERS FOR THE FOLLOWING QUESTIONS 3X1 = 3 Both water and cooking oil are liquid but their chemical characteristics are different. They differ in odour and inflammability. We know that oil burns in air whereas water extinguishes fire. It is this chemical property of oil that makes it different from water. Burning is a chemical change. During this process one substance reacts with another to undergo a change in chemical composition. Chemical change brings change in the chemical properties of matter and we get new substances. A chemical change is also called a chemical reaction. 8. How can you differentiate water from oil? 9. Which one is highly inflammable - Water or oil? 10. How do you confirm the chemical change?
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- Both water and cooking oil are liquid but their chemical characteristics are different. They differ in odour and inflammability. We know that oil burns in air whereas water extinguishes fire. ... During this process one substance reacts with another to undergo a change in chemical composition.
- Although ice, water and water vapour all look different and display different physical properties, they are chemically the same. ... We know that oil burns in air whereas water extinguishes fire. It is this chemical property of oil that makes it different from water. Burning is a chemical change.
- The process of burning (as opposed to evaporating) is a chemical reaction, a chemical change. The wax molecules are undergoing a chemical change; they are changing into different molecules by reacting with a substance in the air.
- Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions. The “ingredients” of a reaction are called reactants, and the end results are called products.
8) . How can you differentiate water from oil?
Ans ▪︎ Oil and water are normally immiscible, but with proper mixing and stability agents, a permanent mixture, or emulsion, can be achieved. O/w emulsions are comprised of oil droplets suspended in an aqueous phase, while w/o emulsions are the opposite- water droplets suspended in a continuous oil phase.
9) oil is highly inflammable .
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