Welcome to the Chemical Reactions and Equations MCQs with Answers, it helps learners quickly identify areas for improvement in Chemical Reactions and Equations Online Test.
| Chemical reactions are processes in which substances called reactants undergo a transformation to form new substances known as products. These reactions are central to chemistry and are defined by changes at the molecular level. For example, combustion reactions involve a substance reacting with oxygen to produce heat and light, such as when wood burns to form ash and smoke.
There are several types of chemical reactions, including synthesis reactions (where two or more substances combine to form a new compound), decomposition reactions (where a single compound breaks down into simpler substances), single replacement reactions (one element replaces another in a compound), double replacement reactions (ions in two compounds exchange places), and redox reactions (involving the transfer of electrons). Every reaction can be represented by a chemical equation, which shows the reactants and products using their chemical formulas. For instance, the chemical reaction formula for water formation is: 2H2+O2→2H2O2. Balancing such equations is crucial, adhering to the Law of Conservation of Mass, which states that matter is neither created nor destroyed in a reaction. |
Chemical Reactions and Equations Online Quiz
By presenting 3 options to choose from, Chemical Reactions and Equations Quiz which cover a wide range of topics and levels of difficulty, making them adaptable to various learning objectives and preferences. You will have to read all the given answers of Chemical Reactions and Equations Questions and Answers and click over the correct answer.
- Test Name: Chemical Reactions and Equations MCQ Quiz Practice
- Type: Quiz Test
- Total Questions: 40
- Total Marks: 40
- Time: 40 minutes
Note: Answer of the questions will change randomly each time you start the test. Practice each quiz test at least 3 times if you want to secure High Marks. Once you are finished, click the View Results button. If any answer looks wrong to you in Quiz, simply click on question and comment below that question, so that we can update the answer in the quiz section.
Download Certificate of Chemical Reactions and Equations Test
On the end of Quiz, you can download the certificate of the quiz if you got more than 70% marks.
Chemical Reactions and Equations Flashcards
What type of reaction occurs when two or more substances combine to form a new substance?
Combination
What type of reaction occurs when a compound breaks down into two or more simpler substances?
Decomposition
What is the number written in front of a chemical formula in a balanced equation called?
Coefficient
What type of reaction occurs when one element replaces another element in a compound?
Single displacement
What is the process of writing a chemical equation to show that mass is conserved during a chemical reaction?
Balancing
What type of reaction occurs when two compounds exchange ions to form two new compounds?
Double displacement
What type of reaction occurs when a metal reacts with an acid to produce hydrogen gas and a salt?
Single displacement
What type of reaction occurs when a substance reacts rapidly with oxygen, often producing heat and light?
Combustion
In a chemical equation, what do the arrow and plus symbols represent?
Reaction direction and separation
What type of reaction occurs when a carbonate reacts with an acid to produce carbon dioxide gas, water, and a salt?
Decomposition
What is the process of breaking down a chemical equation into its reactants and products called?
Decomposition
What type of reaction occurs when a base reacts with an acid to produce water and a salt?
Neutralization
In a chemical equation, what are the symbols used to represent the reactants and products?
Chemical formulas
What type of reaction occurs when a substance reacts with oxygen to produce carbon dioxide and water?
Combustion
What type of reaction occurs when a substance reacts with an acid to produce a gas, often with effervescence?
Acid-base
What is the process of writing a chemical equation to represent a chemical reaction?
Equation formulation
In a chemical equation, what is the role of the arrow symbol?
Indicates the direction of the reaction
What type of reaction occurs when a compound absorbs energy and breaks down into simpler substances?
Decomposition
If you are interested to enhance your knowledge regarding Physics, Computer, and Biology please click on the link of each category, you will be redirected to dedicated website for each category.
