Simple Displacement Reactions in Chemistry
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Questions and Answers

What characterizes a simple displacement reaction?

  • A less reactive element replaces a more reactive element.
  • It involves the breaking of chemical bonds in all cases.
  • A more reactive element displaces a less reactive element from a compound. (correct)
  • The reaction occurs spontaneously without any conditions.

    • In the general displacement reaction represented as A + BC → AC + B, what must be true for the reaction to occur?

  • Element C must be a liquid.
  • Element A must be more reactive than element B. (correct)
  • Both A and B must be metals.
  • Element A must be less reactive than element B.

    • Which of the following is an example of a displacement reaction?

  • CaCO3 → CaO + CO2
  • 2H2 + O2 → 2H2O
  • Zn + 2Cl2 → ZnCl4
  • Cu + 2AgNO3 → 2Ag + Cu(NO3)2 (correct)

    • What does the activity series indicate about metals?

    <p>Higher positioned metals are more reactive than those below them.</p> Signup and view all the answers

    What must happen when a nonmetal is involved in a displacement reaction?

    <p>It must replace another nonmetal in the compound.</p> Signup and view all the answers

    What happens when metals react with dilute acids?

    <p>They displace hydrogen and produce hydrogen gas.</p> Signup and view all the answers

    Which of the following reactions is an example of a double displacement reaction?

    <p>AgNO3 + NaCl → NaNO3 + AgCl</p> Signup and view all the answers

    What is observed during the reaction of metals with dilute acids?

    <p>Brisk effervescence of a colorless gas.</p> Signup and view all the answers

    Which metals are incapable of displacing hydrogen from dilute acids?

    <p>Copper and Silver</p> Signup and view all the answers

    In a precipitation reaction, what is formed?

    <p>An insoluble solid.</p> Signup and view all the answers

    Which of the following is NOT a characteristic of a neutralization reaction?

    <p>It produces hydrogen gas.</p> Signup and view all the answers

    What type of reaction is 2Al + 6HCl → 2AlCl3 + 3H2?

    <p>Single displacement reaction</p> Signup and view all the answers

    Which of the following compounds is produced when zinc reacts with dilute sulfuric acid?

    <p>ZnSO4</p> Signup and view all the answers

    What is produced when a metal oxide reacts with a dilute acid?

    <p>Salt and water</p> Signup and view all the answers

    Which of the following statements correctly describes the purpose of antacids?

    <p>To neutralize excess stomach acid</p> Signup and view all the answers

    An example of a neutralization reaction is:

    <p>Mg(OH)2 + H2SO4 → MgSO4 + H2O</p> Signup and view all the answers

    Which type of oxide is produced through the thermal decomposition of metal carbonates?

    <p>Basic oxide</p> Signup and view all the answers

    What type of bonds do non-metal oxides have?

    <p>Covalent bonds</p> Signup and view all the answers

    Which substance can be used to neutralize wasp stings?

    <p>Vinegar</p> Signup and view all the answers

    Which of the following is NOT a characteristic of acidic oxides?

    <p>Produced from metal reactions</p> Signup and view all the answers

    Which of the following forms metal oxides?

    <p>Direct combination of metals and non-metals</p> Signup and view all the answers

    What color change is observed when copper reacts with silver nitrate?

    <p>The solution turns blue</p> Signup and view all the answers

    Which metal forms a reddish-brown deposit when reacting with copper sulfate?

    <p>Iron</p> Signup and view all the answers

    What is the observation when zinc reacts with lead nitrate?

    <p>Dark grey solid deposit forms</p> Signup and view all the answers

    What is the characteristic flame color of sodium during its reaction with cold water?

    <p>Golden yellow</p> Signup and view all the answers

    Metals below hydrogen in the reactivity series cannot displace which element?

    <p>Hydrogen</p> Signup and view all the answers

    What is produced during the hot water reaction of magnesium with steam?

    <p>Magnesium oxide</p> Signup and view all the answers

    What happens to the blue solution when aluminum reacts with copper sulfate?

    <p>It turns colorless</p> Signup and view all the answers

    What is the correct equation for the reaction of potassium with cold water?

    <p>2K + H2O → 2KOH + H2↑</p> Signup and view all the answers

    Which of the following oxides is classified as an acidic oxide?

    <p>Sulphur trioxide (SO3)</p> Signup and view all the answers

    What happens when a basic oxide reacts with water?

    <p>It produces hydroxides.</p> Signup and view all the answers

    Which of the following statements about amphoteric oxides is true?

    <p>They have both acidic and basic properties.</p> Signup and view all the answers

    How do acidic oxides affect litmus paper?

    <p>They turn blue litmus paper red.</p> Signup and view all the answers

    Which of the following oxides is an example of a neutral oxide?

    <p>Carbon monoxide (CO)</p> Signup and view all the answers

    What is the product when zinc oxide (ZnO) reacts with hydrochloric acid (HCl)?

    <p>Zinc chloride and water</p> Signup and view all the answers

    Which oxide turns phenolphthalein solution pink?

    <p>Calcium oxide (CaO)</p> Signup and view all the answers

    What characteristic do amphoteric oxides exhibit regarding litmus paper?

    <p>They do not change the color of litmus paper.</p> Signup and view all the answers

    Study Notes

    Simple Displacement Reactions

    • Chemical reactions where a more reactive element displaces a less reactive element from a compound are called displacement reactions. Also known as substitution or single displacement reactions.
    • The general equation for a displacement reaction is: A + BC → AC + B
    • The reaction only occurs if element A is more reactive than element B.

    Reactivity Series of Metals

    • The reactivity series arranges metals in decreasing order of their reactivity.
    • Highly reactive metals are at the top of the series.
    • More reactive elements can displace less reactive elements from their compounds.

    Examples of Displacement Reactions (Page 2)

    • Copper and Silver Nitrate: Copper displaces silver
    • Iron and Copper Sulphate: Iron displaces copper
    • Zinc and Lead Nitrate: Zinc displaces lead
    • Magnesium and Copper Sulphate: Magnesium displaces copper

    More Examples (Page 3)

    • **Metals + Cold Water:**Highly reactive metals like sodium and potassium react vigorously, producing hydrogen gas.
    • Metals + Hot Water: Less reactive metals like magnesium react with hot water or steam, forming metal oxides and releasing hydrogen gas.
    • Metals + Dilute Acids: Metals react with dilute acids (like HCl or H2SO4) releasing hydrogen gas. More reactive metals react more rapidly.

    Double Displacement Reactions

    • A reaction where two ionic compounds exchange ions to form two new compounds.
    • One product of the reaction is often an insoluble solid (precipitate).
    • AB + CD → AD + CB

    Neutralization Reactions

    • A reaction between an acid and a base, producing a salt and water.
    • Examples using acids (dilute HCl, HNO3, H2SO4) and metal oxides/hydroxides.

    Applications of Neutralization

    • Antacids neutralize excess stomach acid.
    • Toothpastes neutralize acids created by food particles in the mouth, preventing cavities.
    • Fertilizers adjust soil acidity to support plant growth.

    Oxides

    • Compounds formed when an element reacts with oxygen.
    • Some oxides produce acids when combined with water (acidic oxides), while others produce bases (basic oxides)
    • Amphoteric oxides exhibit both acidic and basic properties.

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    Related Documents

    Chemical Reactions: Displacement, Double Displacement, and Oxides PDF

    Description

    Explore the fascinating world of simple displacement reactions in this quiz. Understand the principles of reactivity series and how more reactive elements can displace less reactive ones. Test your knowledge with examples and reactions involving metals and ionic compounds.

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