ICSE Question Bank

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Class 11 · Chemistry · Structure of Atom
State the de Broglie relation and Heisenberg's uncertainty principle.
3 marksMediumShort answer
Answer available
Class 11 · Chemistry · Structure of Atom
Write the electronic configuration of copper (Z = 29) and explain the anomaly.
3 marksMediumNumerical
Answer available
Class 11 · Chemistry · Hydrocarbons
Name three electrophilic substitution reactions of benzene with the reagent used in each.
3 marksMediumShort answer
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Class 11 · Chemistry · Chemical Bonding and Molecular Structure
What is hybridisation? State the hybridisation and shape of the carbon atom in methane, ethene and ethyne.
3 marksMediumShort answer
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Class 11 · Chemistry · s-Block Elements
Describe the Solvay process for the manufacture of sodium carbonate in outline.
3 marksMediumShort answer
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Class 11 · Chemistry · Hydrocarbons
Why do alkanes undergo substitution while alkenes undergo addition?
3 marksMediumShort answer
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Class 11 · Chemistry · Equilibrium
What is a buffer solution? Give one example of an acidic and one of a basic buffer.
3 marksMediumShort answer
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Class 11 · Chemistry · Redox Reactions
Define oxidation and reduction in terms of electrons, and identify the oxidising agent in Zn + CuSO₄ → ZnSO₄ + Cu.
3 marksMediumShort answer
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Class 11 · Chemistry · Chemical Bonding and Molecular Structure
Using molecular orbital theory, find the bond order of O₂ and state its magnetic behaviour.
3 marksMediumNumerical
Answer available
Class 11 · Chemistry · Equilibrium
Calculate the pH of a 0.01 M solution of hydrochloric acid.
3 marksMediumNumerical
Answer available
Class 11 · Chemistry · Hydrocarbons
Why is benzene unusually stable and why does it prefer substitution to addition?
3 marksMediumShort answer
Answer available
Class 11 · Chemistry · Hydrogen
Why is the position of hydrogen in the periodic table anomalous?
3 marksMediumShort answer
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Class 11 · Chemistry · Organic Chemistry: Some Basic Principles and Techniques
Explain how a mixture of two liquids with close boiling points is separated.
3 marksMediumShort answer
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Class 11 · Chemistry · s-Block Elements
Why do the alkali metals impart a characteristic colour to a flame?
3 marksMediumShort answer
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Class 11 · Chemistry · Redox Reactions
Balance the following redox reaction in acidic medium by the ion-electron method: MnO₄⁻ + Fe²⁺ → Mn²⁺ + Fe³⁺.
3 marksMediumNumerical
Answer available
Class 11 · Chemistry · Chemical Thermodynamics
Distinguish between an open, a closed and an isolated system, with one example of each.
3 marksMediumShort answer
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Class 11 · Chemistry · Some p-Block Elements
What is the inert pair effect, and how does it show itself in group 14?
3 marksMediumShort answer
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Class 11 · Chemistry · States of Matter: Gases and Liquids
What are critical temperature and critical pressure, and what do they mean for the liquefaction of a gas?
3 marksMediumShort answer
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Class 11 · Chemistry · Classification of Elements and Periodicity in Properties
Explain why the first ionisation enthalpy of nitrogen is greater than that of oxygen.
3 marksMediumShort answer
Answer available
Class 11 · Chemistry · Structure of Atom
State the four quantum numbers and what each describes.
3 marksMediumShort answer