Reactants and Products Lesson

Quiz
•
Science
•
7th Grade
•
Hard
+3
Standards-aligned
Lisa Thompson
FREE Resource
15 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The following chemical equations represent three different chemical reactions.
3NaOH + H3PO4 → Na3PO4 + 3H2O
2Mg + O2 → 2MgO
Pb(NO3)2 + 2NaI → PbI2 + 2NaNO3
Which Statement is correct choose the best answer
MgO is a reactant in one of the chemical reactions.
Na3PO4 is a product in one of the chemical reactions.
A total of five oxygen atoms are involved in the first reaction.
H3PO4 shows that three atoms of oxygen are involved in the reaction.
Tags
NGSS.MS-PS1-1
NGSS.MS-PS1-2
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The substances listed on the right side of a chemical equation are the
Yields
Reactants
Products
Precipitates
Tags
NGSS.MS-PS1-5
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
In chemical reactions, what does the principle of conservation of mass mean?
Matter is not created or destroyed.
The total mass of the reactants is greater than the total mass of the products.
The total mass of the reactants is less than the total mass of the products.
Matter is not changed.
Tags
NGSS.MS-PS1-5
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Chemical reactions happen when:
The atoms grow until a substance changes state.
The products break apart into different substances
The atoms rearrange themselves to form new reactants.
The bonds between atoms in reactants break and reform to make new substances.
Tags
NGSS.MS-PS1-5
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Electrolysis of water (H2O) produces which two substances?
O12 and H12
N2 and H2
O22 and N11
O2 and H2
Tags
NGSS.MS-PS1-1
NGSS.MS-PS1-2
NGSS.MS-PS1-5
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of these is NOT true of a chemical equation?
The reactants are on the left side of the equation.
The products are on the right side of the equation.
The two sides of the equation have different types and numbers of atoms.
There may be more than one reactant and more than one product.
Tags
NGSS.HS-PS1-7
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A whole number to the left (Coefficient) of a formula tells:
Volume of a substance.
The average number of molecules.
How many times a substance has undergone a chemical reaction.
How many molecules of that substance are involved in a reaction.
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