Class 10 Practice Level 2 – Chemical Reactions And Equations – set – 2

Total questions: 25

Balance the following chemical equation: $ \displaystyle Al+HCl\to AlC{{l}_{3}}+{{H}_{2}}.$ What are the coefficients for $ \displaystyle Al$ and $ \displaystyle HCl$ ?

Topic: Balancing Chemical Equations

1 and 3

2 and 6

1 and 2

2 and 3

None

Identify the type of reaction for the following equation: $ \displaystyle 2KCl{{O}_{3}}\to 2KCl+3{{O}_{2}}$

Topic: Types of Reactions

Combination

Decomposition

Displacement

Double displacement

None

In the reaction $ \displaystyle 2Na+C{{l}_{2}}\to 2NaCl,$ which element is oxidized and which is reduced?

Topic: Redox Reactions

Sodium is oxidized, chlorine is reduced

Sodium is reduced, chlorine is oxidized

Both are oxidized

Both are reduced

None

Which of the following metals will displace hydrogen from dilute sulfuric acid?

Topic: Displacement Reactions

Silver

Gold

Copper

Magnesium

None

What is the product formed when sodium carbonate reacts with hydrochloric acid?

Topic: Chemical Equations

Sodium chloride, water, and carbon dioxide

Sodium hydroxide and water

Sodium sulfate and water

Sodium chloride and hydrogen

None

Identify the types of reaction for the following equation: $ \displaystyle 2{{H}_{2}}+{{O}_{2}}\to 2{{H}_{2}}O$.

Topic: Types of Chemical Reactions

Combination

Decomposition

Displacement

Double displacement

None

In the reaction $ \displaystyle 2Zn+{{O}_{2}}\to 2ZnO,$ which element is oxidized?

Topic: Oxidation

Zinc

Oxygen

Both

Neither

None

In the reaction $ \displaystyle CuO+{{H}_{2}}\to Cu+{{H}_{2}}O,$ which substance is reduced?

Topic: Reduction

Copper oxide

Hydrogen

Copper

Water

None

What is the precipitate formed when solutions of silver nitrate and sodium chloride are mixed?

Topic: Precipitation Reactions

Silver chloride

Sodium nitrate

Silver nitrate

Sodium chloride

None

10.

Which of the following reactions is a double displacement reaction?

Topic: Double Displacement Reactions

$ \displaystyle HCl+NaOH\to NaCl+{{H}_{2}}O$

$ \displaystyle Zn+HCl\to ZnC{{l}_{2}}+{{H}_{2}}$

$ \displaystyle 2{{H}_{2}}+{{O}_{2}}\to 2{{H}_{2}}O$

$ \displaystyle BaC{{l}_{2}}+NaS{{O}_{4}}\to BaS{{O}_{4}}+2NaCl$

None

11.

Balance the following chemical equation: $ \displaystyle {{C}_{2}}{{H}_{6}}+{{O}_{2}}\to C{{O}_{2}}+{{H}_{2}}O$ What are the coefficients for $ \displaystyle {{C}_{2}}{{H}_{6}}$ and $ \displaystyle {{O}_{2}}$ ?

Topic: Chemical Equations

1 and 3.5

2 and 7

1 and 2

2 and 3

None

12.

Which of the following reactions is a displacement reaction?

Topic: Types of Reactions

$ \displaystyle NaOH+HCl\to NaCl+{{H}_{2}}O$

$ \displaystyle 2{{H}_{2}}+{{O}_{2}}\to 2{{H}_{2}}O$

$ \displaystyle Fe+CuS{{O}_{4}}\to Cu+FeS{{O}_{4}}$

$ \displaystyle 2KCl{{O}_{3}}\to 2KCl+3{{O}_{2}}$

None

13.

What happens to the mass of copper when it corrodes?

Topic: Chemical Reactions

Increases

Decreases

Remains the same

First increases then decreases

None

14.

Which of the following reactions is an endothermic reaction?

Topic: Endothermic Reactions

Combustion of methane

Melting of ice

Neutralization of acid and base

Respiration

None

15.

Which of the following reactions releases energy in the form of heat?

Topic: Exothermic Reactions

Photosynthesis

Freezing of water

Combustion of coal

Boiling of water

None

16.

Identify the reducing agent in the reaction $ \displaystyle 2Mg+{{O}_{2}}\to 2MgO$ :

Topic: Redox Reactions

Magnesium

Oxygen

Magnesium oxide

None

17.

Which of the following reactions is a combination reaction?

Topic: Types of Chemical Reactions

$ \displaystyle 2{{H}_{2}}+{{O}_{2}}\to 2{{H}_{2}}O$

$ \displaystyle CaC{{O}_{3}}\to CaO+C{{O}_{2}}$

$ \displaystyle Zn+CuS{{O}_{4}}\to ZnS{{O}_{4}}+Cu$

$ \displaystyle NaOH+HCl\to NaCl+{{H}_{2}}O$

None

18.

Which of the following metals will not displace iron from iron sulfate sollution?

Topic: Reactivity Series

Magnesium

Zinc

Copper

Aluminium

None

19.

In the reaction $ \displaystyle Zn+CuS{{O}_{4}}\to ZnS{{O}_{4}}+Cu$, which substance is reduced?

Topic: Oxidation and Reduction

Zinc

Copper sulfate

Zinc sulfate

Copper

None

20.

Which of he following is an indicator of a chemical reaction?

Topic: Indicators Of Chemical Reactions

Change in temperature

Change in state

Change in physical state

None of these

None

21.

Which of the following reactions is an example of a displacement reaction?

Topic: Types of Reactions

$ \displaystyle 2{{H}_{2}}+{{O}_{2}}\to 2{{H}_{2}}O$

$ \displaystyle CuS{{O}_{4}}+Zn\to ZnS{{O}_{4}}+Cu$

$ \displaystyle NaOH+HCl\to NaCl+{{H}_{2}}O$

$ \displaystyle CaC{{O}_{3}}\to CaO+C{{O}_{2}}$

None

22.

Which of the following reactions is exothermic?

Topic: Exothermic and Endothermic Reactions

Photosynthesis

Combustion of natural gas

Evaporation of water

Melting of ice

None

23.

Which of the following metals is most reactive?

Topic: Reactivity Series

Sodium

Gold

Platinum

Zinc

None

24.

In the reaction $ \displaystyle 4Fe+3{{O}_{2}}\to 2F{{e}_{2}}{{O}_{3}}$, which element is reduced?

Topic: Oxidation and Reduction

Iron

Oxygen

Both

Neither

None

25.

Identify the precipitate formed in the reaction $ \displaystyle Pb{{\left( {N{{O}_{3}}} \right)}_{2}}+2KI\to Pb{{I}_{2}}+2KN{{O}_{3}}.$

Topic: Double Displacement Reactions

Potassium nitrate

Lead iodide

Lead nitrate

Potassium iodide

None

1 out of 25

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Class 10 Practice Level 2 – Chemical Reactions And Equations – set – 2

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