Chemical reactions and equations MCQ Quiz | Class 10th Chemistry | Quiz 2

1. What is a chemical equation?

A statement that represents the change in state
A statement that represents the physical change
A statement that represents the chemical reaction
None of the above

2. What is the balanced chemical equation for the reaction between iron and sulfur to form iron sulfide?

2Fe + S -> 2FeS
Fe + S -> FeS
FeS -> Fe + S
FeS2 -> Fe + S

3. What is the product formed when hydrochloric acid reacts with sodium hydroxide?

Sodium chloride and oxygen gas
Hydrogen gas and oxygen gas
Sodium hydroxide and water
Sodium chloride and water

4. What is the chemical equation for the reaction between copper oxide and hydrochloric acid?

CuO + HCl -> CuCl2 + H2O
CuO + 2HCl -> CuCl2 + H2O
CuO + HCl -> Cu(OH)Cl + H2O
CuO + 2HCl -> CuCl2 + H2O + Cl2

5. What is the type of reaction when two or more substances combine to form a single substance?

Combination reaction
Decomposition reaction
Displacement reaction
Double displacement reaction

6. What is the balanced chemical equation for the reaction between potassium chloride and silver nitrate?

KCl + AgNO3 -> KNO3 + AgCl
KNO3 + AgCl -> KCl + AgNO3
KCl + AgNO3 -> KCl2 + Ag
KCl + AgNO3 -> KAgNO3 + Cl

7. What is the product formed when magnesium metal reacts with hydrochloric acid?

Magnesium oxide and hydrogen gas
Oxygen gas and magnesium chloride
Magnesium chloride and hydrogen gas
Oxygen gas and magnesium oxide

8. What is the type of reaction when a substance reacts with oxygen to produce energy?

Double displacement reaction
Decomposition reaction
Displacement reaction
Combustion reaction

9. What is the balanced chemical equation for the reaction between sodium hydroxide and hydrochloric acid?

NaOH + HCl -> NaOHCl + H2O
NaCl + H2O -> NaOH + HCl
NaOH + HCl -> NaCl + H2O
NaOH + HCl -> NaCl + H2O + Cl2

10. What is the purpose of using coefficients in a balanced chemical equation?

To show the relative masses of each substance
To show the relative number of molecules of each substance
To show the relative energy of each substance
To show the relative charges of each substance

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