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Chemical Reactions and Energy

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Questions and Answers

Which type of reaction requires energy in the form of heat, light, or electricity to break reactants?

Endothermic Reaction (correct)

Double Displacement Reaction

Oxidation-Reduction Reaction

Displacement Reaction

What is the product obtained when CaCO3 is heated?

CaO(s) + CO2(g) (correct)

CaO(s) + 2CO2(g)

CaCO(s) + O2(g)

Ca(s) + CO3(g)

In the reaction 2Cu + O2 → 2CuO, what process is occurring with oxygen?

Evolution of Gas

Double Displacement

Reduction

Oxidation (correct)

What type of reaction involves the mutual exchange of ions between two compounds?

Double Displacement Reaction Signup and view all the answers

What is the color change observed when Ferrous sulphate reacts to form Ferric oxide?

Green to Red-brown Signup and view all the answers

What happens when Zinc reacts with copper sulfate?

Copper is displaced by Zinc Signup and view all the answers

In which type of reaction is heat released along with the formation of products?

Combination reaction Signup and view all the answers

What is the product formed when CaO reacts with H2O?

Ca(OH)2 (aq) Signup and view all the answers

Which type of chemical reaction involves the burning of natural gas, releasing heat?

Combination reaction Signup and view all the answers

What happens in an electrolytic decomposition reaction?

Gas is evolved Signup and view all the answers

Which type of reaction involves the formation of water from hydrogen and oxygen?

Combination reaction Signup and view all the answers

What is released during the burning of coal?

$CO2$ (g) Signup and view all the answers

In a chemical reaction, the formation of a precipitate is characterized by which of the following?

Change in state from solid to liquid Signup and view all the answers

Which observation denotes a change in temperature in a chemical reaction?

Increase in temperature Signup and view all the answers

The evolution of gas in a chemical reaction can be observed in the reaction between zinc and dilute sulphuric acid. What is the gas produced in this reaction?

Hydrogen gas Signup and view all the answers

When quicklime reacts with water to form slaked lime, what is the characteristic change in temperature observed?

Increase in temperature Signup and view all the answers

Writing chemical equations involves representing reactants and products using symbols and formulas. Which of the following represents a balanced chemical equation?

Fe + O2 → Fe2O3 Signup and view all the answers

Colour change in a chemical reaction can be observed in the reaction between citric acid and purple colored potassium permanganate solution. What does the color change indicate?

Reduction reaction Signup and view all the answers

Chemical Reactions and Energy

Choose a study mode

Podcast

Questions and Answers

Which type of reaction requires energy in the form of heat, light, or electricity to break reactants?

What is the product obtained when CaCO3 is heated?

In the reaction 2Cu + O2 → 2CuO, what process is occurring with oxygen?

What type of reaction involves the mutual exchange of ions between two compounds?

What is the color change observed when Ferrous sulphate reacts to form Ferric oxide?

What happens when Zinc reacts with copper sulfate?

In which type of reaction is heat released along with the formation of products?

What is the product formed when CaO reacts with H2O?

Which type of chemical reaction involves the burning of natural gas, releasing heat?

What happens in an electrolytic decomposition reaction?

Which type of reaction involves the formation of water from hydrogen and oxygen?

What is released during the burning of coal?

In a chemical reaction, the formation of a precipitate is characterized by which of the following?

Which observation denotes a change in temperature in a chemical reaction?

The evolution of gas in a chemical reaction can be observed in the reaction between zinc and dilute sulphuric acid. What is the gas produced in this reaction?

When quicklime reacts with water to form slaked lime, what is the characteristic change in temperature observed?

Writing chemical equations involves representing reactants and products using symbols and formulas. Which of the following represents a balanced chemical equation?

Colour change in a chemical reaction can be observed in the reaction between citric acid and purple colored potassium permanganate solution. What does the color change indicate?

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