Chemical Reaction Of Respiration Quiz
In this quiz, you will get to learn about the chemical reactions. Play this quiz and test your knowledge on this!
- 1.What type of reaction is FeS + 2HCl --> FeCl2 + H2S
- A.
Synthesis
- B.
Decomposition
- C.
Physical
- D.
Replacement
- 2.In a chemical equation numbers often appear in front of a chemical formula. These numbers tell you the
- A.
Number of atoms in each molecule in the reaction
- B.
Number of elements in the reaction
- C.
Number of molecules or atoms of each substance in the reaction
- D.
Number of molecules in each atom in the reaction
- 3.Chemistry is...
- A.
A characteristic of substance that can be observed without changing the substance into another substance
- B.
The study of matter an how matter changes
- C.
Anything that has mass and takes up space
- D.
A rapid reaction between oxygen and a substance called a fuel
- 4.A chemical reaction that absorbs energy in the form of heat is described as
- A.
Endothermic
- B.
Exothermic
- C.
Combustion
- D.
Unbalanced
- 5.The substances listed on the left side of a chemical equation are the
- A.
Products
- B.
Coefficients
- C.
Precipitates
- D.
Reactants
- 6.Which two processes could be considered opposites?
- A.
Decomposition and replacement
- B.
Replacement and precipitate
- C.
Precipitate and synthesis
- D.
Synthesis and decomposition
- 7.Which group contains the most elements?
- A.
Metalloids
- B.
Nonmetals
- C.
Metals
- D.
Transition elements
- 8.Every chemical reaction involves a change in
- A.
Mass
- B.
Energy
- C.
Concentration
- D.
State
- 9.The number placed below an element's symbol in a chemical formula is called a
- A.
Subscript
- B.
Coefficient
- C.
Reactant
- D.
Product
- 10.CaCO3 represents a chemical ...
- A.
Symbol
- B.
Formula
- C.
Subscript
- D.
Reaction
- 11.The only sure evidence for a chemical reaction is
- A.
The formation of a gas
- B.
A color change
- C.
The production of one or more new substances
- D.
Changes in properties
- 12.The principle of conservation of mass is true...
- A.
Only for reactions that take place in open systems
- B.
Only for reactions that take place in closed systems
- C.
For all reactions
- D.
For no reactions
- 13.What happens when chemical bonds break and new bonds form
- A.
A physical change
- B.
A chemical reaction
- C.
Matter is destroyed
- D.
Surface area increases
- 14.A chemical equation that shows the same number of each kind of atom on both sides of the equation is said to be....
- A.
Balanced
- B.
Unbalanced
- C.
An incomplete reaction
- D.
A replacement reaction
- 15.From an element's location in the periodic table you can predict
- A.
Its properties
- B.
Name
- 16.In chemical reactions, what does the principle of conservation of mass mean?
- A.
Matter is not created or destroyed
- B.
The total mass of the reactants is greater than the total mass of the products
- C.
The total mass of the reactants is less than the total mass of the products
- D.
Matter can never be changed
- 17.What type of chemical reaction is represented in the reaction ____ N2 + __3__ H2 à ___2_ NH3
- A.
Synthesis
- B.
Decomposition
- C.
Replacement
- D.
Combustion
- 18.2 H2 + O2 à ____ H2O
- 19.2 Ag2O à ____ Ag + O2
- 20.What are the reactants in the following equations 2 H2O + O2 à 2 H2O2
- A.
Water and oxygen
- B.
Hydrogen peroxide
- C.
Carbon dioxide
- D.
Oxygen
Questions: 12 | Attempts: 10454 | Last updated: Apr 6, 2021
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