14 Questions
Which statement best defines a chemical reaction?
A process that involves the formation of new substances with different properties
Which of the following situations represents a chemical change?
Food getting digested in our body
What happens when a magnesium ribbon is burned using a spirit lamp or burner, as described in Activity 1.1?
It forms ash
Which of the following represents a physical change?
Milk left at room temperature during summers
Why is it recommended to wear eye protection during Activity 1.1?
To protect the eyes from bright light emitted during burning
What is the white powder formed when magnesium ribbon burns in air?
Magnesium oxide
In the given activity, why is it important to keep the burning magnesium ribbon as far as possible from your eyes?
To protect the eyes from potential splattering of molten magnesium
Which of the following observations helps us determine whether a chemical reaction has taken place?
Evolution of a gas
What happens when dilute hydrochloric acid or sulphuric acid is added to zinc granules?
Evolution of hydrogen gas
What are the substances that undergo a chemical change in the reaction when a magnesium ribbon is burnt in oxygen?
Magnesium and oxygen
What is the product of the reaction between lead nitrate solution and potassium iodide solution?
Lead iodide
What makes a word-equation concise and useful for representing a chemical reaction?
Use of chemical formulae instead of words
Which side of a chemical equation contains the products?
Right-hand side (RHS)
What does an arrow placed between the reactants and products in a chemical equation represent?
The change from reactants to products
Test your understanding of chemical reactions by considering various daily life situations and predicting the outcomes. Explore scenarios like leaving milk at room temperature, exposing iron to humid atmosphere, fermentation of grapes, cooking food, digestion, and respiration.
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