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Questions and Answers
Which type of reaction requires energy in the form of heat, light, or electricity to break reactants?
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?
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?
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?
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 is the color change observed when Ferrous sulphate reacts to form Ferric oxide?
What happens when Zinc reacts with copper sulfate?
What happens when Zinc reacts with copper sulfate?
In which type of reaction is heat released along with the formation of products?
In which type of reaction is heat released along with the formation of products?
What is the product formed when CaO reacts with H2O?
What is the product formed when CaO reacts with H2O?
Which type of chemical reaction involves the burning of natural gas, releasing heat?
Which type of chemical reaction involves the burning of natural gas, releasing heat?
What happens in an electrolytic decomposition reaction?
What happens in an electrolytic decomposition reaction?
Which type of reaction involves the formation of water from hydrogen and oxygen?
Which type of reaction involves the formation of water from hydrogen and oxygen?
What is released during the burning of coal?
What is released during the burning of coal?
In a chemical reaction, the formation of a precipitate is characterized by which of the following?
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?
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?
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?
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?
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?
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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