Physical Science Questions?

U

undrea96

New member
1. All of the following are types of chemical reactions EXCEPT:
A) single replacement
B) combustion
C) electric
D) synthesis
2. What type of reaction is represented by the following equation?
H2CO3 -> H2O + CO2
A) Synthesis
B) Single replacement
C) Double replacement
D) Decomposition
3. What occurs in a single-replacement reaction?
A) One element takes the place of another element in a compound
B) Two different compounds exchange ions and form new compounds
C) Two or more substances react to form a single substance
D) A compound breaks down into two or more simpler substances
4. Which of the following is a combustion reaction?
A) KOH + HCl -> KCl + H2O
B) 2C2H6 + 7O2 -> 4CO2 + 6H2O
C) 3MgO + 2H3PO4 -> Mg3(PO4)2 + 3H2O
D) CaO + CO2-> CaCO3
5. Which of the following is a synthesis reaction?
A) KOH + HCl -> KCl + H2O
B) .2C2H6 + 7O2 -> 4CO2 + 6H2O
C) 3MgO + 2H3PO4 -> Mg3(PO4)2 + 3H2O
D) CaO + CO2-> CaCO3



Thank You:)
 
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