Grade 10 Chemistry Test 2 Solutions &
Explanations ✔️
Grade 10 Chemistry Test 2 Solutions &
Explanations ✔️
PART A: KNOWLEDGE
Multiple Choice
1. Why does burning a log seem to disobey the Law of Conservation of Mass?
a) They log remains the same.
b) The gases escape and cannot be measured. ➡ Since the log is being burnt in an unclosed system,
the gases escape (CO2), which make up part of the mass of the log.
c) The log actually gains mass when burned.
d) The log gains mass since gases attach themselves to the log.
e) There is the creation of a liquid during the burning.
2. Which of the following is NOT an acid?
a) HCl
b) HBr
c) HF
d) H2SO4
e) NaOH ➡ It is a base because the formula does not begin with Hydrogen, but it contains Hydroxide.
3. What is the most common polyatomic ion found in bases?
Create the best notes with app.hellovaia.com
, a) SO4-2
b) CO3-2
c) Cr2O7-2
d) OH-1 ➡ The most common polyatomic ions found in bases are OH-1 (Hydroxide) and HCO3-1
(Bicarbonate)
e) H+1
4. Sodium and Hydrochloric Acid react to produce a salt and Hydrogen Gas. Na + HCl ➡ NaCl + H2 What
kind of reaction is this?
a) Decomposition
b) Single Displacement ➡ *Refer to Activity Series for Metals. Since Na is more reactive than H, it can
displace it.
c) Double Displacement
d) Synthesis
e) Neutralization
5. Neutralization reactions occur between...
a) A non-metallic oxide and a basic oxide.
b) An acid and a base. ➡ An acid and base neutralize to form water and salt.
c) A salt and water.
d) An acid and chocolate milk.
6. Heating Sodium Bicarbonate, to produce water, Carbon Dioxide, and Sodium Carbonate
NaHCO3 ➡ NaCO3 + H2O + CO2 is a:
a) Decomposition Reaction. ➡ NaHCO3 is being split or decomposed into NaCO3, H2O and CO2.
b) Synthesis Reaction.
c) Single Displacement Reaction.
d) Double Displacement Reaction.
e) Combustion Reaction.
7. Which equation is NOT balanced?
a) 2C2H6 + 7O2 ➡ 4CO2 + 6H2O
Create the best notes with app.hellovaia.com
Explanations ✔️
Grade 10 Chemistry Test 2 Solutions &
Explanations ✔️
PART A: KNOWLEDGE
Multiple Choice
1. Why does burning a log seem to disobey the Law of Conservation of Mass?
a) They log remains the same.
b) The gases escape and cannot be measured. ➡ Since the log is being burnt in an unclosed system,
the gases escape (CO2), which make up part of the mass of the log.
c) The log actually gains mass when burned.
d) The log gains mass since gases attach themselves to the log.
e) There is the creation of a liquid during the burning.
2. Which of the following is NOT an acid?
a) HCl
b) HBr
c) HF
d) H2SO4
e) NaOH ➡ It is a base because the formula does not begin with Hydrogen, but it contains Hydroxide.
3. What is the most common polyatomic ion found in bases?
Create the best notes with app.hellovaia.com
, a) SO4-2
b) CO3-2
c) Cr2O7-2
d) OH-1 ➡ The most common polyatomic ions found in bases are OH-1 (Hydroxide) and HCO3-1
(Bicarbonate)
e) H+1
4. Sodium and Hydrochloric Acid react to produce a salt and Hydrogen Gas. Na + HCl ➡ NaCl + H2 What
kind of reaction is this?
a) Decomposition
b) Single Displacement ➡ *Refer to Activity Series for Metals. Since Na is more reactive than H, it can
displace it.
c) Double Displacement
d) Synthesis
e) Neutralization
5. Neutralization reactions occur between...
a) A non-metallic oxide and a basic oxide.
b) An acid and a base. ➡ An acid and base neutralize to form water and salt.
c) A salt and water.
d) An acid and chocolate milk.
6. Heating Sodium Bicarbonate, to produce water, Carbon Dioxide, and Sodium Carbonate
NaHCO3 ➡ NaCO3 + H2O + CO2 is a:
a) Decomposition Reaction. ➡ NaHCO3 is being split or decomposed into NaCO3, H2O and CO2.
b) Synthesis Reaction.
c) Single Displacement Reaction.
d) Double Displacement Reaction.
e) Combustion Reaction.
7. Which equation is NOT balanced?
a) 2C2H6 + 7O2 ➡ 4CO2 + 6H2O
Create the best notes with app.hellovaia.com
