AimMent

For Class 8, 9 & 10

Foundation - a strong base in Physics, Chemistry, Maths & Biology

Concept-first questions with clear model answers across all four subjects, aligned to NCERT. Start early, build the habit, and walk into your board exams, NEET and JEE already ahead.

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SubjectAllPhysics 19Chemistry 19Biology 19Mathematics 27
ChapterAllAcids, Bases and SaltsArithmetic ProgressionsCarbon and its CompoundsChemical Reactions and EquationsCirclesControl and CoordinationCoordinate GeometryElectricityHeredity and EvolutionHow do Organisms ReproduceIntroduction to TrigonometryLife ProcessesLight - Reflection and RefractionMagnetic Effects of Electric CurrentMetals and Non-metalsOur EnvironmentPair of Linear Equations in Two VariablesPolynomialsProbabilityQuadratic EquationsReal NumbersSome Applications of TrigonometryStatisticsSurface Areas and VolumesThe Human Eye and the Colourful WorldTriangles

Showing 1 question for Class 10. Tap a card to reveal the answer.

ChemistryMetals and Non-metalsmedium

Zinc can displace copper from copper sulphate, but copper cannot displace zinc from zinc sulphate. Explain.

Reveal answer ↓

What it is

Metals higher in the reactivity series displace those lower down, never the reverse.

Answer

In the reactivity series zinc lies above copper, so zinc is more reactive and loses electrons more readily. Therefore zinc displaces the less reactive copper: Zn + CuSO4 -> ZnSO4 + Cu. Copper, being less reactive than zinc, cannot displace zinc, so Cu + ZnSO4 does not react.

Zn + CuSO4 -> ZnSO4 + Cu

  • •Reactivity: Zn above Cu
  • •More reactive metal displaces less reactive
  • •Zn + CuSO4 -> ZnSO4 + Cu
  • •Cu + ZnSO4 -> no reaction

Why learn this

It decides how metals are extracted, stored and used to prevent corrosion.

💡 Memory trick

Zinc is above copper, so Zn wins; copper can't push zinc back.