Chemical Reactions and Equations: Daily Life Situations Quiz

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What is the nature of a chemical change?

The nature of a chemical change is that the identity of the initial substance has somewhat changed.

What is the indication that a chemical reaction has taken place?

A chemical reaction has taken place when a chemical change occurs.

What is the purpose of Activity 1.1?

The purpose of Activity 1.1 is to observe the burning of a magnesium ribbon and collect the ash formed.

How can we identify the occurrence of a chemical reaction?

The occurrence of a chemical reaction can be identified by observing the changes in the substances involved. Signup and view all the answers

What is the significance of the quote 'Facts are not science — as the dictionary is not literature' in the text?

The quote emphasizes that facts alone do not constitute science, just as a dictionary alone does not make literature. Signup and view all the answers

What happens when food is cooked?

When food is cooked, a chemical change takes place in the substances involved. 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

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

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

What is the word-equation for the reaction when a magnesium ribbon is burnt in oxygen?

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

What are the reactants and products in the chemical reaction of burning magnesium ribbon in oxygen?

Reactants: Magnesium and Oxygen, Product: Magnesium oxide 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 happens when dilute hydrochloric acid or sulphuric acid is added to zinc granules?

Formation of hydrogen gas Signup and view all the answers

What happens when lead nitrate solution is mixed with potassium iodide solution?

Observation of a specific reaction Signup and view all the answers

What does the arrow in a chemical equation represent?

The direction of the reaction Signup and view all the answers

What are the substances that undergo chemical change in a given reaction called?

Reactants Signup and view all the answers

What does a word-equation show?

Change of reactants to products Signup and view all the answers

Chemical Reactions and Equations: Daily Life Situations Quiz

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