WorksheetsChemical Reaction Test
Total questions: 38
Worksheet time: 32mins
Which is NOT an indications that a chemical reaction has occurred?
Temperature Change
Taste change
Color Change
Bubbles
Which of the following are decomposition reactions?
CH4 (g) + O2 (g) → CO2 (g) + H2O (1)
CaO (s) + CO2 (g) → CaCO3 (s)
Mg (s) + O2 (g) → MgO (s)
PbCO3 (s) → PbO (s) + CO2 (g)
When propane is reacted in the presence of oxygen gas, the products of this combustion reaction are:
CO2 + H2
C + H2
CO2 + H2O
CH2 + H2O
In a decomposition reaction:
the reactants are generally two ionic compounds in aqueous solution
energy in the form of heat or light is often needed
one of the reactants is often water
the reactants are usually a metal and a nonmetal
Combination reactions always:
involve an element and an ionic compound
form only one product
require oxygen gas
use only one reactant
Of the balanced chemical equations below, which one most correctly represents a combustion reaction?
2 Mg + 02 → 2 MgO
2 CH4 + 4 O2 → 2 CO2 + 4H2O
CaO + H2O Ca(OH)2
2 N2 + 3 H2 → 2 NH3
Which chemical equation correctly represents the decomposition reaction that takes place when ammonia breaks down to form hydrogen gas and nitrogen gas?
NH3 + H2 → N2
NH3 → N+H
NH3 → N2 + H2
N2 + H2 → NH3
The chemical equation, KCIO3 → KCI + O2, is an example of which type of reaction?
decomposition
double-replacement
combustion
single-replacement
In the following chemical reaction, what product is represented by X? AICI3+ NaOH → X + NaCl
Al3OH
AIOH
It cannot be determined.
Al(OH)3
The chemical equation, Cr + Fe(NO3)2 → Fe + Cr(NO3)3, is an example of which type of reaction?
combustion
single-replacement
double-replacement
decomposition
Of the reactions below, which one is a double-replacement reaction?
NH4CI→ NH3 + HCI
2 Mg + 02 → 2 MgO
2 N2 + 3 H2 → 2 NH3
Cd(NO3)2 + Na2S → CdS + 2 NaNO3
The chemical equation 2H2 + O2 → H2O represents a
double-replacement reaction
single-replacement reaction
decomposition reaction
synthesis reaction
The following chemical equation is classified as a CaCO3 → CaO + CO2
synthesis reaction
double-replacement reaction
decomposition reaction
single-replacement reaction
What is the complete ionic equation for the following chemical equation? BaCl2(aq) + Na2SO4(aq) → BaSO4(s) + 2NaCl(aq)
Ba2+(aq) + SO42-(aq) → BaSO4(s)
Ba2+(aq) + 2Cl-(aq) + 2Na+(aq) + SO42-(aq) → 2Na+(aq) + 2Cl-(aq) + BaSO4(s)
Ba2+(aq) + Cl-(aq) + Na+(aq) + SO422-(aq) · Na+(aq) + Cl-(aq) + BaSO4(s)
BaCl2(aq) + 2Na+(aq) + SO42-(aq) → 2Na+(aq) + 2Cl-(aq) + BaSO4(s)
In the chemical equation below, which of the components is a precipitate? HCl(aq) + AgNO3(aq) → AgCl(s) + HNO3(aq)
HNO3(aq)
HCl(aq)
AgCl(s)
AgNO3(aq)
In the following unbalanced chemical reaction, which components are classified as the reactants? C7H16+02→ CO2 + H2O (a) (b)
Consider the following balanced equation. Which one of the following statements is false? 2H2 + O2 → H2O
Two molecules of H2 will produce one molecules of H2O.
One molecule of O2 will produce 2 molecules of H2O.
One molecule of O2 will react with 2 molecules of H2.
Two molecules of H2 will produce one molecule of H2O.
What are the products of the reaction between barium hydroxide and hydrochloric acid?
chloric acid and barium
barium hydroxide and water
barium chloride and water
barium chloride and barium hydride
The chemical equation Zn + 2HCI → H2 + ZnCl2 represents a (a)
Which of the following components will always be produced during a chemical reaction between an acid and a base?
a base
water
a gas
an acid
The major physical indicator of a combustion reaction is
the formation of a precipitate
Heat
a color change in solution
Cold
ID the reaction type: 3 H2(g) + N2(g) → 2 NH3(g) (a)
ID the reaction type: BaCl2(aq)+Na2SO4(aq)→BaSO4(s)+2NaCl(aq) (a)
ID the reaction type: H2SO4 + 2KOH → K2SO4 + 2H2O (a)
ID the reaction type: 2AgNO3(aq)+Cu(s)→Cu(NO3)2(aq)+2Ag(s) (a)
2H2 + O2 --> 2H2O
2H2 + O2 --> 2H2O
Mg + __HCl ---> MgCl2 + H2
In the equation, 2Mg + O2 ---> 2MgO, which are the reactants?
Mg and O
Mg and MgO
MgO
O and MgO
Balance this equation:
H2 + Cl2 ---> HCl
It is balanced.
H2 + Cl2 ---> 2HCl
3H2 + Cl2 ---> 6HCl
H2 + 3Cl2 ---> 6HCl
What type of reaction is this?
