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Questions and Answers
What is the product formed when calcium hydroxide reacts with carbon dioxide in air?
What is the product formed when calcium hydroxide reacts with carbon dioxide in air?
- Water
- Hydrogen gas
- Calcium hydroxide
- Calcium carbonate (correct)
Which chemical formula is associated with marble?
Which chemical formula is associated with marble?
- CaCO3 (correct)
- Ca(OH)2
- H2O
- CH4
Which type of reaction involves two or more substances combining to form a single product?
Which type of reaction involves two or more substances combining to form a single product?
- Single displacement reaction
- Neutralization reaction
- Decomposition reaction
- Combination reaction (correct)
What is the general term for reactions that release heat during the formation of products?
What is the general term for reactions that release heat during the formation of products?
Which gas is produced during the burning of natural gas according to the text?
Which gas is produced during the burning of natural gas according to the text?
What is the final state of rice, potatoes, and bread during digestion according to the text?
What is the final state of rice, potatoes, and bread during digestion according to the text?
Which symbol is used to represent a substance present as a solution in water?
Which symbol is used to represent a substance present as a solution in water?
In the reaction 3Fe(s) + 4H2O(g) → Fe3O4(s) + 4H2(g), why is (g) used with H2O?
In the reaction 3Fe(s) + 4H2O(g) → Fe3O4(s) + 4H2(g), why is (g) used with H2O?
When are physical states usually included in a chemical equation?
When are physical states usually included in a chemical equation?
In the equation 340 atm CO(g) + 2H2(g) → CH3OH(l), what do the reaction conditions 340 atm represent?
In the equation 340 atm CO(g) + 2H2(g) → CH3OH(l), what do the reaction conditions 340 atm represent?
What does the presence of 'Chlorophyll' indicate in this equation: 6CO2(aq) +12H2O(l) → C6H12O6(aq) + 6O2(aq) + 6H2O(l)?
What does the presence of 'Chlorophyll' indicate in this equation: 6CO2(aq) +12H2O(l) → C6H12O6(aq) + 6O2(aq) + 6H2O(l)?
Why are physical states not usually included in a chemical equation?
Why are physical states not usually included in a chemical equation?
What is the chemical equation for the reaction between magnesium and oxygen?
What is the chemical equation for the reaction between magnesium and oxygen?
Which observation does NOT indicate a chemical reaction has taken place?
Which observation does NOT indicate a chemical reaction has taken place?
What type of gas is formed by the action of dilute sulphuric acid on zinc?
What type of gas is formed by the action of dilute sulphuric acid on zinc?
What happens when lead nitrate solution is mixed with potassium iodide solution?
What happens when lead nitrate solution is mixed with potassium iodide solution?
Which compound is formed by the burning of magnesium ribbon in air?
Which compound is formed by the burning of magnesium ribbon in air?
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