
Simple Chemical Reactions
Authored by Lisa Thompson
Science
8th Grade
NGSS covered
Used 2+ times

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15 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
How do you test for Chlorine gas?
Bleaches damp litmus paper
Makes a squeaky pop with a lit splint
Relights a glowing splint
Turns limewater milky
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The missing numbers in sequence in this reaction to balance the equation for burning hydrogen in air are:
___ H2 (g) + _____O2 (g) → _____ H2O (g)
4 3 2
2 1 2
1 1 1
1 2 1
Tags
NGSS.MS-PS1-5
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Balance this equation:
MgCl2 --> Mg4+ Cl2
It's already balanced.
4MgCl2 --> Mg4+ 4Cl2
4MgCl2 --> Mg4+ 5Cl2
Tags
NGSS.MS-PS1-5
4.
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
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Is the following equation balanced or unbalanced ?
Al + O2 --> Al2O3
Balanced
Unbalanced
Tags
NGSS.MS-PS1-5
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Is the following equation balanced or unbalanced ?
N2 +3 H2 --> 2NH3
Balanced
Unbalanced
Tags
NGSS.MS-PS1-5
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
How many atoms of aluminum are on each side of the following equation: 4Al + 3O2 --> 2Al2 O3
2
6
1
4
Tags
NGSS.MS-PS1-5
NGSS.MS-PS1-1
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