Podcast
Questions and Answers
Which statement best defines a chemical reaction?
Which statement best defines a chemical reaction?
- A process that involves the formation of new substances with different properties (correct)
- A change in the color of a substance
- A process that only changes the state of matter
- A change in the physical state of a substance
Which of the following situations represents a chemical change?
Which of the following situations represents a chemical change?
- Food cooked
- Food getting digested in our body (correct)
- An iron tawa/pan/nail left exposed to humid atmosphere
- Milk left at room temperature during summers
What happens when a magnesium ribbon is burned using a spirit lamp or burner, as described in Activity 1.1?
What happens when a magnesium ribbon is burned using a spirit lamp or burner, as described in Activity 1.1?
- It turns black
- It remains unchanged
- It forms ash (correct)
- It emits a foul odor
Which of the following represents a physical change?
Which of the following represents a physical change?
Why is it recommended to wear eye protection during Activity 1.1?
Why is it recommended to wear eye protection during Activity 1.1?
What is the white powder formed when magnesium ribbon burns in air?
What is the white powder formed when magnesium ribbon burns in air?
In the given activity, why is it important to keep the burning magnesium ribbon as far as possible from your eyes?
In the given activity, why is it important to keep the burning magnesium ribbon as far as possible from your eyes?
Which of the following observations helps us determine whether a chemical reaction has taken place?
Which of the following observations helps us determine whether a chemical reaction has taken place?
What happens when dilute hydrochloric acid or sulphuric acid is added to zinc granules?
What happens when dilute hydrochloric acid or sulphuric acid is added to zinc granules?
What are the substances that undergo a chemical change in the reaction when a magnesium ribbon is burnt in oxygen?
What are the substances that undergo a chemical change in the reaction when a magnesium ribbon is burnt in oxygen?
What is the product of the reaction between lead nitrate solution and potassium iodide solution?
What is the product of the reaction between lead nitrate solution and potassium iodide solution?
What makes a word-equation concise and useful for representing a chemical reaction?
What makes a word-equation concise and useful for representing a chemical reaction?
Which side of a chemical equation contains the products?
Which side of a chemical equation contains the products?
What does an arrow placed between the reactants and products in a chemical equation represent?
What does an arrow placed between the reactants and products in a chemical equation represent?
