Question 1

What is one way you can detect a chemical reaction?

Accepted Answer

a gas is produced therefore you might see bubbles

Answer

a substance dissolves and mixes well

Answer

the substance evaporates

Answer

the substance melts

Question 2

What is the KEY characteristic of a chemical reaction?

Accepted Answer

the production of new materials that are chemically different from the starting materials

Answer

it changes state ONLY

Answer

Nono of the above

Answer

it melts at the end of the chemical reaction

Question 3

During a chemical reaction chemical bonds ....

Accepted Answer

chemical bonds are either formed or broken apart

Answer

nothing happens it remains the same

Answer

chemical bonds evaporate

Answer

the mass of the increases

Question 4

There are three main types of chemical reactions. Which one comines to make a more complex substance

Accepted Answer

synthesis

Answer

None of the above

Answer

Triple Bond

Answer

a double bond

Question 5

What does the following equation stands for:

Accepted Answer

https://uploads.quizalize.com/602064cb-4285-41e5-931a-c27aac7378d5/question/bec6b1d66d1153119bb392b0898df12fb820a0b7.png

Answer

https://uploads.quizalize.com/602064cb-4285-41e5-931a-c27aac7378d5/question/57f1c02a9e52d5363b7e8e05bcbc4b34dd1e9ab8.png

Answer

https://uploads.quizalize.com/602064cb-4285-41e5-931a-c27aac7378d5/question/2017fa98a414b9085ba08000f49555c2804bf37f.png

Answer

https://uploads.quizalize.com/602064cb-4285-41e5-931a-c27aac7378d5/question/9cad76ac035b5b5911b0580cb04975987d186d9d.png

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