A. Multiple Choiceen ammonia breaks down to form hydrogen gas and.docxstelzriedemarla
A. Multiple Choice
en ammonia breaks down to form hydrogen gas and nitrogen gas
?
A. NH
3
+ H
2
→ N
2
B. NH
3
→ N1. Which chemical equation correctly represents the decomposition reaction that takes place
wh + H
C. N
2
+ H
2
→ NH
3
D. NH
3
→ N
2
+ H
2
2. When propane is reacted in the presence of oxygen gas, the products of this combustion
reaction are:
A. C + H
2
B. CH
2
+ H
2
O
C. CO
2
+ H
2
D. CO
2
+ H
2
O
3. In a decomposition reaction:
A. the reactants are usually a metal and a nonmetal
B. one of the reactants is often water
C. the reactants are generally two ionic compounds in aqueous solution
D. energy in the form of heat or light is often produced
4. Synthesis reactions always:
A. use only one reactant
B. form only one product
C. involve an element and an ionic compound
D. require oxygen gas
5. Of the reactions below, which one is a double-replacement reaction?
A. NH
4
Cl → NH
3
+ HCl
B. 2 Mg + O
2
→ 2 MgO
C. 2 N
2
+ 3 H
2
→ 2 NH
3
D. Cd(NO
3
)
2
+ Na
2
S → Cd
S
+ 2 NaNO
3
6. The chemical equation,
Cr + Fe(NO
3
)
2
→ Fe + Cr(NO
3
)
3
,
is an example of which type of
reaction?
A. decomposition B. single-replacement
C. double-replacement
D. combustion
7. The chemical equation,
KClO
3
→ KCl + O
2
, is an example of which type of reaction?
A. decomposition B. single-replacement
C. double-replacement D. combustion
8. Which of the following are decomposition reactions?
1. CH
4
+ O
2
→ CO
2
+ H
2
O
2. CaO + CO
2
→ CaCO
3
3. Mg + O
2
→ MgO
4. PbCO
→ PbO + CO
2
A. 2 and 3 B. 2, 3, and 4 C. 4 only D. All are decomposition reactions.
9. Of the balanced chemical equations below, which one is combustion reaction?
A. 2 CH
4
+ 4 O
2
→ 2 CO
2
+ 4 H
2
O
B. CaO + H
2
O → Ca(OH)
2
C. 2 N
2
+ 3 H
2
→ 2 NH
3
D. 2 Mg + O
2
→ 2 MgO
10. In the following chemical reaction, what product is represented by X?
AlCl
3
+ NaOH → X + NaCl
A. AlOH
B. Al(OH)
3
C. Al
3
OH
D. It cannot be determined
B. Answer the following Question
1. List the 5 type of chemical reactions
_________________________________________________________________________
_________________________________________________________________________
2. The type of chemical reaction that produces CO
2
and H
2
O is ________________________
3. The 2 examples of chemical reaction that produce CO
2
and H
2
O in everyday life are:
1) ______________________________________________________________________
2) ______________________________________________________________________
4. List the 6 possible evidence that.
1. GENERAL CHEMISTRY-I (1411)
S.I. # 7
1. Define the following:
a. Combination Reaction: ______________________________________
b. Decomposition Reaction: _____________________________________
c. Combustion Reaction:
_____________________________________________________________________
2. Define the following:
a. Limiting Reactant: __________________________________________
b. Theoretical Yield: ____________________________________________
____________________________________________________________________
c. Percent Yield_________________________________________________
3. The fermentation of glucose (C6H12O6) produces ethyl alcohol (C2H5OH) and
CO2:
C6H12O6 (aq) 2 C2H5OH (aq) + 2 CO2 (g)
a. How many moles of CO2 are produced when 0.400 mol of C6H12O6 reacts in
this fashion?
b. How many grams of C6H12O6 are need to form 7.50 g of C2H5OH?
c. How many grams of CO2 form when 7.50 g of C2H5OH are produced?
4. Why are the amounts of products formed in a reaction determined only by the
amount of the limiting reactant?
2. 5. Sodium hydroxide reacts with carbon dioxide as follows:
2 NaOH (s) + CO2 Na2CO3 (s) + H2O (l)
Which reagent is the limiting reactant when 1.85 mol NaOH and 1.00 mol CO2 are
allowed to react? How many moles of the excess reactant remain after the
completion of the reaction?
6. When benzene (C6H6) reacts with bromine (Br2), bromobenzene (C6H5Br) is
obtained:
C6H6 + Br2 C6H5Br + HBr
a. what is the theoretical yield of bromobenzene in this reaction when 30.0 g of
benzene reacts with 65.0 g of bromine?
b. If the actual yield of bromobenzene was 56.7 g, what was the percentage yield?