18 Questions
What type of reaction occurs when an element displaces another element from its compound?
Displacement reaction
Which of the following best describes a double displacement reaction?
Two different atoms are exchanged
In a precipitation reaction, what is produced?
Insoluble salts
What is the defining characteristic of an exothermic reaction?
Heat is given out
What happens in a displacement reaction?
An element displaces another element from its compound
Which process involves the gain of oxygen or loss of hydrogen?
Oxidation
Which type of reaction involves the exchange of ions to form products?
Double displacement reaction
In a displacement reaction, a more reactive element displaces a less reactive element from its compound. Which statement best explains why this occurs?
The more reactive element has a higher tendency to lose electrons
Which of the following reactions is an example of a displacement reaction?
Zinc + Silver nitrate → Zinc nitrate + Silver
Which of the following reactions involve the release of energy in the form of heat and light during the reaction?
Exothermic reactions
What type of reaction occurs when two compounds exchange ions to form new compounds?
Double displacement reaction
In a displacement reaction, why does the more reactive element displace the less reactive one from a compound?
Because it has a higher reduction potential
In the reaction 2PbO(s) + C(s) → 2Pb(s) + CO2(g), which of the following statements is incorrect?
Carbon is getting oxidised.
What type of reaction is represented by the equation Fe2O3 + 2Al → Al2O3 + 2Fe?
Displacement reaction.
When dilute hydrochloric acid is added to iron fillings, what is the correct outcome?
Hydrogen gas and iron chloride are produced.
What is the purpose of balancing a chemical equation?
To ensure conservation of mass in the reaction.
Translate 'Hydrogen gas combines with nitrogen to form ammonia' into a balanced chemical equation.
H2 + N2 → NH3
Balance the chemical equation NaCl + AgNO3 → AgCl + NaNO3
NaCl + 2AgNO3 → 2AgCl + NaNO3
Explore a chemical reaction involving a double displacement reaction and identify the substances that are oxidised and reduced in the given reactions. Test your understanding of balancing chemical equations and recognizing oxidation and reduction.
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