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Balanced Chemical Equations and Reaction Types Quiz

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Balanced Chemical Equations and Reaction Types Quiz

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Questions and Answers

What type of reaction is represented by the chemical equation: Zinc + Silver nitrate → Zinc nitrate + Silver?

Decomposition reaction

Double displacement reaction

Displacement reaction (correct)

Combination reaction

Why are decomposition reactions considered the opposite of combination reactions?

They result in the formation of more complex compounds.

They always require energy input for the reaction to proceed.

They release energy in the form of heat and light.

They involve the breakdown of molecules into simpler substances. (correct)

Which type of reaction is characterized by the absorption of heat from the surroundings?

Displacement reaction

Endothermic reaction (correct)

Exothermic reaction

Double displacement reaction

In the equation: Magnesium + Hydrochloric acid → Magnesium chloride + Hydrogen, what role does hydrochloric acid play?

Reactant (B) Signup and view all the answers

Which type of reaction is represented by the equation: Potassium bromide(aq) + Barium iodide(aq) → Potassium iodide(aq) + Barium bromide(s)?

Precipitation reaction (A) Signup and view all the answers

Why is respiration considered an exothermic reaction?

It releases energy in the form of heat and light. (D) Signup and view all the answers

What happens in a double displacement reaction?

Positive ions exchange places between two compounds. (A) Signup and view all the answers

Which of the following is not a characteristic of a displacement reaction?

'Water is always formed as a product. (B) Signup and view all the answers

What is the distinguishing feature of a decomposition reaction where energy is supplied in the form of electricity?

Substances break down due to electrical energy input. (A) Signup and view all the answers

Which statement best describes a precipitation reaction?

A solid forms when two aqueous solutions are mixed. (A) Signup and view all the answers