Question 1

1. Which is NOT TRUE about the Laws of Conservation of Mass and Matter.

I. The mass of raw materials is not equal to the mass of the product.

II. There is a change in the type of elements before and after the reaction.

III. The mass and type of atoms of the reactant/s are not the same as the mass and type of atoms present in the product/s.

Accepted Answer

I, II, III

Answer

I only

Answer

I and II

Answer

II and II

Question 2

2. In the equation 2FeSO4(s) + Heat → Fe2O3(s) + SO2 (g)+ SO3(g)

Accepted Answer

the equation is balanced.

Answer

there are more elements in the reactant sides.

Answer

there are more elements in the product side.

Answer

the mass of the product is greater.

Question 3

3. Based on this unbalanced equation CaCO3 → ____+ CO2,what would be the other product?

Accepted Answer

CaO

Answer

O2

Answer

C

Answer

CO

Question 4

4. What are the possible products when two aqueous ionic solution combine chemically?

I. Water

II. Gas

III. An insoluble solid

Accepted Answer

I, II, III

Answer

III only

Answer

I only

Answer

II only

Question 5

5. The products derived from a combustion reaction are _____.?

Accepted Answer

CO2 + H2O

Answer

CO2 + H2

Answer

C + H2O

Answer

CO2 + O2

Question 6

6. Magnesium has an oxidation state of +2 and oxygen has -2. What would be the product, if these ions are combined?

Accepted Answer

MgO(s)

Answer

Mg2O2(s)

Answer

Mg3O(s)

Answer

MG3O2(s)

Question 7

7. What would NOT indicate that the chemical equation is balanced?

Accepted Answer

The atoms in the reactants are lesser in number compared to the products.

Answer

The type of atoms in the reactants is always the same as the type of atoms in the products.

Answer

The sum of their masses is equal for both the reactants and products.

Answer

The type and numbers of atoms are the same on both reactants and products sides.

Question 8

8. If the products of a double displacement reaction are AgCl(s) + NaNO3(aq), the reactants must be ____.

Accepted Answer

AgNO3(aq) + NaCl(s)

Answer

Ag2NO3(aq) + NaCl(s)

Answer

Ag4NO3(aq) + NaCl(s)

Answer

AgNO2 (aq)+ NaCl(s

Question 9

9. The other product for this equation 2 HCl(aq) + Zn(s) → ZnCl2(aq) + ____is

Accepted Answer

H2(g)

Answer

H2O (l)

Answer

H2O (g)

Answer

Cl2(g)

Question 10

10. Predict the products of this equation MgCl2 + I2 →?

Accepted Answer

No Reaction

Answer

Both A and B

Answer

MgCl2(s) + I2 → MgCl2(s) + I(s)

Answer

MgCl2(s) + I2 → MgI2 (s) + Cl2 (s)

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