FOURTH QUARTER MODULE 3: CHEMICAL REACTIONS AROUND US
Quiz by Loisa Tolentino
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- Q1
Which type of chemical reaction is involved once you turned on the gas stove?
Combustion Reaction
Decomposition Reaction
Combination Reaction
Single Replacement Reaction
30sS10MT -IVe - g -23 - Q2
Which is NOT TRUE about the Law of Conservation of mass?
Mass is neither created nor destroyed in a chemical reaction.
The product of the reaction is different from the reactants but, the mass is still the same.
The total mass of the product of the reaction is less than the reactants.
The number of atoms before and after the reaction are equal.
30sS10MT -IVe - g -23 - Q3
How can we say that a chemical reaction took place between reactants?
If a new product was formed and there is a change in color, state, odor, and taste, or bubbles evolve.
If there is a change in color, state, odor, and taste, or bubbles evolve.
If the reactants’ number of atoms remains the same.
If a new product was formed.
30sS10MT -IVe - g -23 - Q4
What type of chemical reaction given in H2O (l) + MgO(s) → Mg(OH)2(S)
Combustion
Decomposition
Combination
Single Replacement
30sS10MT -IVe - g -23 - Q5
What type of chemical reaction given in 2NaCl(s) + F2(g) → 2NaF(s) + Cl2(l)
Double Replacement
Single Replacement
Decomposition
Combination
30sS10MT -IVe - g -23 - Q6
What type of chemical reaction given in 2NaClO3(s) → 2NaCl(s) + 3O2(g)
Decomposition
Single Replacement
Combination
Double Replacement
30sS10MT -IVe - g -23 - Q7
What type of chemical reaction given in 3Ba(s) + Cr2O3(s) → 3BaO(s) + 2Cr(s)
Combustion
Combination
Decomposition
Single Replacement
30sS10MT -IVe - g -23 - Q8
What numerical coefficients are needed to balance the equation ___CH4(g) + ___O2(g) → ___CO2(g) + ___H2O (g)
2CH4(g) + O2(g) → 4CO2(g) + 2H2O(g)
CH4(g) + O2(g) → 2CO2(g) + H2O (g)
CH4(g) + 2O2(g) → CO2(g) + 2H2O(g)
CH4(g) + O2(g) → CO2(g) + H2O (g)
60sS10MT -IVe - g -23 - Q9
What numerical coefficients are needed to balance the equation ___CaCO3(s) + ___ HCl(aq) → ___ CaCl2 (aq) + ___ CO2(g) + ___ H2O(l)
CaCO3(s) + 2HCl(aq) → CaCl2 (aq) + CO2(g) + H2O(l)
CaCO3(s) + HCl(aq) → 2CaCl2 (aq) + CO2(g) + H2O(l)
CaCO3(s) + HCl(aq) → CaCl2 (aq) + 2CO2(g) + H2O(l)
2CaCO3(s) + HCl(aq) → CaCl2 (aq) + CO2(g) + H2O(l)
60sS10MT -IVe - g -23 - Q10
If I want to use a wire to hang my plants, which will last longer: an iron wire or a copper wire? Why?
An iron wire because it is more reactive to water and oxygen than copper.
A copper wire because it is less reactive to water and oxygen than iron.
An iron wire because it is less reactive to water and oxygen than copper.
A copper wire because it is more reactive to water and oxygen than iron.
30sS10MT -IVe - g -23