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Chemical Reactions and Daily Life

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Questions and Answers

What happens when milk is left at room temperature during summers?

Milk spoils due to the growth of bacteria in warm temperatures.

What happens when an iron tawa/pan/nail is left exposed to humid atmosphere?

The iron tawa/pan/nail rusts due to the reaction with oxygen and moisture in the air.

What happens when grapes get fermented?

The sugars in the grapes are converted to alcohol and carbon dioxide by microorganisms.

What happens when food is cooked?

Chemical changes occur in the food due to the application of heat, leading to the formation of new compounds and flavors. Signup and view all the answers

What happens when food gets digested in our body?

Complex molecules in food are broken down into simpler substances through chemical reactions in the digestive system. Signup and view all the answers

What happens when we respire?

During respiration, oxygen is used to release energy from glucose through a series of chemical reactions, producing carbon dioxide and water as byproducts. Signup and view all the answers

What is the word-equation for the reaction between magnesium and oxygen?

Magnesium + Oxygen → Magnesium oxide Signup and view all the answers

What are the substances that undergo chemical change in the reaction between magnesium and oxygen?

Magnesium and oxygen Signup and view all the answers

What are the possible observations that can help determine whether a chemical reaction has taken place?

Change in state, change in color, evolution of a gas, change in temperature Signup and view all the answers

How can chemical equations be made more concise and useful?

By using chemical formulae instead of words. Signup and view all the answers

What is the product of the reaction between lead nitrate solution and potassium iodide solution?

Lead iodide Signup and view all the answers