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This quiz contains questions related to the chemical reactions. Various multiple-choice questions are added to the quiz to make it more effective for the students.
In a chemical reaction, bonds are broken and new bonds are formed that create new substances. The bonds that are broken are called what?
Reactants
Products
Atoms
Catalysts
Which of the following is a physical change?
Getting a haircut
Rusty metal
sour milk
A compound
What indicates a chemical reaction occurred?
Heat or Light is released
gas (bubbles) produced
color change
all of the above
Which of the following is an example of a physical change?
wood burning
ice melting
food digesting
iron rusting
Which of the following is a chemical change?
the rusting of iron
melting an ice cube
dissolving salt in water
bending a copper wire
How do chemical reactions turn substances into new substances?
with burning acid
the molecules mix together and create new substances
the atoms break apart and combine back together in new ways
the ionic compounds mix in water to form solutions
The only way you can be certain that a chemical reaction has occurred is by?
Light has been emitted
a color change has occurred
bubbles appear
identifying one or more new chemical products
Why is tearing a piece of paper only a physical change?
It changes the paper.
It is hard to tear.
It only changes its size, but it's still paper
None of the above
