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Questions and Answers
What is the chemical formula for ferrous sulphate?
What is the chemical formula for ferrous sulphate?
- Fe₂O₃
- Pb(NO₂)₃
- FeO
- FeSO₄ (correct)
In the reaction where white silver chloride turns grey in sunlight, what is the result of the reaction?
In the reaction where white silver chloride turns grey in sunlight, what is the result of the reaction?
- Chlorine gas
- Silver nitrate
- Silver oxide
- Silver (correct)
What are the products of the reaction involving lead nitrate (Pb(NO₂)₃) when it decomposes?
What are the products of the reaction involving lead nitrate (Pb(NO₂)₃) when it decomposes?
- Pb(OH)₂ and HNO₃
- PbO₂ and N₂ gas
- PbO and NO₂ gas (correct)
- Pb(NO₂)₂ and O₂ gas
Which chemical compound is formed when ferrous sulphate decomposes?
Which chemical compound is formed when ferrous sulphate decomposes?
What is the color change observed when white silver chloride turns grey in sunlight?
What is the color change observed when white silver chloride turns grey in sunlight?
Which type of elements can participate in displacement reactions based on the text?
Which type of elements can participate in displacement reactions based on the text?
What is the reaction of metals with copper sulfate solution called?
What is the reaction of metals with copper sulfate solution called?
When a metal reacts with a compound to displace another element, what is it displacing?
When a metal reacts with a compound to displace another element, what is it displacing?
Which of the following is NOT involved in displacement reactions according to the text?
Which of the following is NOT involved in displacement reactions according to the text?
In the context of displacement reactions, what role do non-metals play?
In the context of displacement reactions, what role do non-metals play?
What type of chemical reaction involves a change in the oxidation number of elements?
What type of chemical reaction involves a change in the oxidation number of elements?
In an oxidation-reduction reaction, which element undergoes a decrease in oxidation number?
In an oxidation-reduction reaction, which element undergoes a decrease in oxidation number?
What is the role of the reducing agent in an oxidation-reduction reaction?
What is the role of the reducing agent in an oxidation-reduction reaction?
Which of the following statements is true about oxidation numbers in a reaction?
Which of the following statements is true about oxidation numbers in a reaction?
What happens to the oxidation number of an element that is being oxidized in a redox reaction?
What happens to the oxidation number of an element that is being oxidized in a redox reaction?
Which type of reaction involves the absorption of heat?
Which type of reaction involves the absorption of heat?
In the context provided, what role does CuO play?
In the context provided, what role does CuO play?
Which term describes a process that both absorbs heat and causes a substance to be oxidized while reducing another?
Which term describes a process that both absorbs heat and causes a substance to be oxidized while reducing another?
What is the function of a Reducing Agent in a chemical reaction?
What is the function of a Reducing Agent in a chemical reaction?
Which type of reaction involves a substance being both oxidized and reduced?
Which type of reaction involves a substance being both oxidized and reduced?
What is the process that involves the loss of electrons?
What is the process that involves the loss of electrons?
Which of the following is a slow conversion of metals into undesirable compounds?
Which of the following is a slow conversion of metals into undesirable compounds?
What forms when iron reacts with oxygen and moisture?
What forms when iron reacts with oxygen and moisture?
Which process is known for being present in the atmosphere and causing metal decay?
Which process is known for being present in the atmosphere and causing metal decay?
Which process is incorrectly matched with its definition?
Which process is incorrectly matched with its definition?
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Study Notes
Chemical Formulae and Reactions
- The chemical formula for ferrous sulphate is FeSO₄.
- The reaction of white silver chloride (AgCl) turning grey in sunlight results in the formation of silver (Ag) and chlorine (Cl₂).
- Lead nitrate (Pb(NO₂)₃) decomposes to form lead oxide (PbO), nitrogen dioxide (NO₂), and oxygen (O₂).
- Ferrous sulphate (FeSO₄) decomposes to form iron oxide (Fe₂O₃) and sulfur dioxide (SO₂).
Displacement Reactions
- Metals can participate in displacement reactions.
- The reaction of metals with copper sulfate solution is called displacement.
- In displacement reactions, a metal displaces another element from a compound.
Oxidation-Reduction Reactions
- Oxidation-reduction reactions involve a change in the oxidation number of elements.
- The element that undergoes a decrease in oxidation number is the reducing agent.
- The role of the reducing agent is to donate electrons.
- The oxidation number of an element being oxidized in a redox reaction increases.
- The type of reaction that involves the absorption of heat is endothermic.
Redox Reactions
- CuO plays the role of an oxidizing agent.
- The term that describes a process that both absorbs heat and causes a substance to be oxidized while reducing another is oxidation-reduction.
- The function of a reducing agent is to donate electrons.
- Redox reactions involve a substance being both oxidized and reduced.
- Oxidation is the process that involves the loss of electrons.
Corrosion
- The slow conversion of metals into undesirable compounds is known as corrosion.
- Rust forms when iron reacts with oxygen and moisture.
- The process present in the atmosphere and causing metal decay is corrosion.
- The incorrectly matched process with its definition is not mentioned in the provided text.
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