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Chemistry- Types Of Reactions
Test Description: Types of chemical reactions
Instructions: Answer all questions to get your test result.
1) In a chemical reaction, the yields sign points to
A
the yields sign
B
the product
C
the reactants
2) Which of the following states the law of conservation of mass
A
mass cannot be created or destroyed in a chemical reaction
B
atoms are rearranged in a reaction and join new molecules
C
compounds form a new compound with different properties
D
energy is neither created nor destroyed in a chemical reaction
3) If a chemical symbol in a chemical formula has no subscript, it means
A
the chemical is listed last in the formula
B
the element has no charge
C
only one atom of the element is in the molecule
D
the chemical symbol is written without any numbers
4) Why does the law of conservation of mass dictate that chemical equations be balance?
A
because chemical formulas are written from left to right
B
because elements are classified by weight
C
because using the wrong chemical symbol causes confusion
D
because atoms are never gained or lost in a chemical reaction
5) What happens to atoms in a chemical reaction?
A
They are sometimes lost, never rearranged.
B
They are never lost or gained, just rearranged.
C
They are lost or gained, and never rearranged.
D
They are sometimes lost, gained or rearranged.
6) What is the chemical symbol for sodium?
A
Na
B
Sd
C
S
D
NA
7) In a single displacement reaction,
A
a more reactive element can replace a less reactive element
B
a less reactive element can replace a more reactive element
C
only metals and nonmetals can react
D
most often nonmetals are involved
8) What type of reaction is when an element replaces another element
A
double displacement reaction
B
decomposition
C
single displacement reaction
D
synthesis
9) What type of reaction is when two substances combine to form a new compound?
A
decomposition
B
single displacement
C
synthesis
D
double displacement
10) What type of reaction is when a substance breaks down into a new substance?
A
synthesis
B
single displacement
C
double dispacement
D
decomposition
*select an answer for all questions
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