Displacement and Double Displacement ReactionsPractice Questions & MCQs
Practice Displacement and Double Displacement Reactions questions from Chemical Reactions and Equations (Class 10 Science) - important MCQs with answers and step-by-step solutions. Solve the sample questions below, then practice the full set free on the RankByte app.
Displacement and Double Displacement ReactionsQuiz - Solve & Score
Q1. Iron nails dipped in copper sulphate solution turn brownish and the blue colour of the solution fades. What type of reaction is this?
- A.Displacement reaction
- B.Combination reaction
- C.Decomposition reaction
- D.Neutralisation reaction
Answer: A. Displacement reaction
Q2. What would you observe when zinc is added to a solution of iron(II) sulphate?
- A.No reaction
- B.Displacement
- C.Formation of a precipitate
- D.Change in color
Answer: B. Displacement
Eliminate first - option A) 'No reaction' misses the point - This is not the correct answer; option C) 'Formation of a precipitate' doesn't hold - This is not the correct answer; option D) 'Change in color' is wrong because This is not the correct answer. That leaves only option B). Confirm with the chapter rule: Displacement (chemistry, chapter 'Chemical Reactions and Equations'). Answer: B) Displacement.
Q3. Which metal can displace copper from copper sulphate solution (NCERT)?
- A.platinum
- B.iron
- C.gold
- D.silver
Answer: B. iron
Spot-the-setup - a typical chemistry numerical. We are after the quantity the stem asks for. Tool of choice - hence the answer = iron. Rearrange it for the unknown before substituting. Common-sense check: the reactivity series runs K > Na > Ca > Mg > Al > Zn > Fe > Pb > (H) > Cu > Hg > Ag > Au. Lock in option B) iron. Trap-watch: option A) 'platinum' is wrong because Platinum is less reactive than copper; option C) 'gold' fails since Gold is far less reactive than copper.
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