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Questions and Answers
Which statement best describes the relationship between chemical changes and chemical reactions?
Which statement best describes the relationship between chemical changes and chemical reactions?
- A chemical change can occur without a chemical reaction.
- Chemical changes are reversible, but chemical reactions are not.
- Chemical reactions and chemical changes are interchangeable terms.
- Chemical reactions always lead to chemical changes. (correct)
Why is it important to wear suitable eyeglasses during Activity 1.1?
Why is it important to wear suitable eyeglasses during Activity 1.1?
- To show respect for the teacher's instructions.
- To look more scientific and professional.
- To avoid eye injuries from any splashes or debris. (correct)
- To improve vision while performing the experiment.
What type of chemical reaction is taking place when barium chloride and sodium sulphate react to give barium sulphate and sodium chloride?
What type of chemical reaction is taking place when barium chloride and sodium sulphate react to give barium sulphate and sodium chloride?
- Combination reaction
- Redox reaction
- Decomposition reaction
- Double displacement reaction (correct)
In the reaction between sodium hydroxide and hydrochloric acid, what are the products formed?
In the reaction between sodium hydroxide and hydrochloric acid, what are the products formed?
In a redox reaction, which of the following statements is TRUE?
In a redox reaction, which of the following statements is TRUE?
What happens to atoms during a chemical reaction?
What happens to atoms during a chemical reaction?
Which type of reaction involves the breaking and making of bonds between atoms to produce new substances?
Which type of reaction involves the breaking and making of bonds between atoms to produce new substances?
What is the product formed when calcium oxide reacts with water?
What is the product formed when calcium oxide reacts with water?
In the reaction between Zinc and Silver nitrate, which element is oxidized?
In the reaction between Zinc and Silver nitrate, which element is oxidized?
Which of the following reactions is an example of an endothermic reaction?
Which of the following reactions is an example of an endothermic reaction?
What type of reaction is represented by the equation: Magnesium(s) + Hydrochloric acid(aq) → Magnesium chloride(aq) + Hydrogen(g)?
What type of reaction is represented by the equation: Magnesium(s) + Hydrochloric acid(aq) → Magnesium chloride(aq) + Hydrogen(g)?
Which of the following reactions represents a displacement reaction?
Which of the following reactions represents a displacement reaction?
Which of the following is a decomposition reaction where energy is supplied in the form of light?
Which of the following is a decomposition reaction where energy is supplied in the form of light?
What type of reaction involves the formation of a solid product known as a precipitate?
What type of reaction involves the formation of a solid product known as a precipitate?
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