Understanding chemical reactions
Quiz
•
Chemistry
•
KG - Professional Development
•
Medium
Ali Alnakhli
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18 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Matter can undergo two types of reactions what are they ?
chemical and mental
physical and chemical
physical and mental
physical and directional
2.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
A physical change does not produce new substances ?
True
False
Answer explanation
A physical change does not produce new substances. The substances that exist before and after the change are the same, although they might have different physical properties
3.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
The starting substances and the substances produced have the same physical and chemical properties
True
False
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a chemical reaction?
A chemical reaction is a description of a reaction using element symbols and chemical formulas.
A chemical reaction is a process in which atoms bond to form a compound.
A chemical reaction is a process in which atoms of one or more substances rearrange to form one or more new substances.
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
What are signs of a chemical reaction?
odor
state of matter
color
all of the above
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
If substances get warmer or cooler or if they give off light or sound, it is likely that a reaction has occurred.
true
false
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
you can be 100% sure, that a chemical reaction happens if the physical properties have changed
true
false
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