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Chemical Reactions and Daily Life Situations Quiz

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Chemical Reactions and Daily Life Situations Quiz

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Questions and Answers

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?

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?

It turns black

It remains unchanged

It forms ash (correct)

It emits a foul odor

Which of the following represents a physical change?

Milk left at room temperature during summers Signup and view all the answers

Why is it recommended to wear eye protection during Activity 1.1?

To protect the eyes from bright light emitted during burning Signup and view all the answers

What is the white powder formed when magnesium ribbon burns in air?

Magnesium oxide Signup and view all the answers

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 Signup and view all the answers

Which of the following observations helps us determine whether a chemical reaction has taken place?

Evolution of a gas Signup and view all the answers

What happens when dilute hydrochloric acid or sulphuric acid is added to zinc granules?

Evolution of hydrogen gas Signup and view all the answers

What are the substances that undergo a chemical change in the reaction when a magnesium ribbon is burnt in oxygen?

Magnesium and oxygen 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

What makes a word-equation concise and useful for representing a chemical reaction?

Use of chemical formulae instead of words Signup and view all the answers

Which side of a chemical equation contains the products?

Right-hand side (RHS) Signup and view all the answers

What does an arrow placed between the reactants and products in a chemical equation represent?

The change from reactants to products Signup and view all the answers