Chemical Reactions: What Happens in a Chemical Reaction?
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Questions and Answers

What is a chemical reaction?

A chemical reaction is any chemical change in matter that involves the transformation into one or more substances with entirely different properties.

What is a chemical bond?

A chemical bond is the attractive force that holds the atoms of a molecule together in a compound.

How are chemical reactions represented?

Chemical reactions are represented by chemical equations.

What are the reactants and products in a chemical reaction?

<p>The substances taking part in a reaction are called reactants, and the new substances formed are called products.</p> Signup and view all the answers

What are the characteristics of chemical reactions?

<p>Chemical reactions are characterized by changes that are quite easily observed.</p> Signup and view all the answers

What gas is evolved when zinc reacts with dilute sulphuric acid?

<p>Hydrogen</p> Signup and view all the answers

What gas is produced when potassium chlorate is heated strongly?

<p>Oxygen</p> Signup and view all the answers

What gas is liberated when sodium sulphite is treated with dilute hydrochloric acid?

<p>Sulphur dioxide</p> Signup and view all the answers

What color does the blue colored copper sulphate solution turn into when iron is added?

<p>Light green</p> Signup and view all the answers

What color precipitate is formed when ferrous hydroxide is produced in the reaction between ferrous sulphate and sodium hydroxide?

<p>Dirty green</p> Signup and view all the answers

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