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Redox Reactions

Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.

Concept of Oxidation and Reduction

Subtopic

Concept of Oxidation and Reduction under Redox Reactions for Grade 11 ICSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which oxidation state does Chromium exhibit in the CrO42−CrO_4^{2-} ion?

    A.

    +3

    B.

    +4

    C.

    +6

    D.

    +2

  2. 2.

    Identify the reducing agent in the reaction: Mg+2Ag+→Mg2++2AgMg + 2Ag^+ \rightarrow Mg^{2+} + 2Ag

    A.

    Ag+Ag^+

    B.

    MgMg

    C.

    Mg2+Mg^{2+}

    D.

    AgAg

  3. 3.

    What is the oxidation state of Carbon in CH4CH_4?

    A.

    +4

    B.

    -4

    C.

    +2

    D.

    0

Download the worksheet for Redox Reactions - Concept of Oxidation and Reduction to practice offline. It includes additional chapter-level practice questions.

Oxidation Number Method

Subtopic

Oxidation Number Method under Redox Reactions for Grade 11 ICSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    What is the oxidation number of Carbon in the bicarbonate ion (HCO3−HCO_3^-)?

    A.

    +2

    B.

    +3

    C.

    +4

    D.

    +1

  2. 2.

    The oxidation number of Oxygen in the superoxide ion (O2−O_2^-) is:

    A.

    -2

    B.

    -1

    C.

    -0.5

    D.

    +2

  3. 3.

    In K2MnO4K_2MnO_4 (Potassium manganate), what is the oxidation number of Manganese?

    A.

    +7

    B.

    +4

    C.

    +6

    D.

    +2

Download the worksheet for Redox Reactions - Oxidation Number Method to practice offline. It includes additional chapter-level practice questions.

Balancing Redox Reactions

Subtopic

Balancing Redox Reactions under Redox Reactions for Grade 11 ICSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    What is the oxidation state of Carbon in the carbonate ion (CO32−CO_{3}^{2-})?

    A.

    +2

    B.

    +4

    C.

    +6

    D.

    -2

  2. 2.

    In the following half-reaction, what is the value of 'n'? MnO4−+8H++ne−→Mn2++4H2OMnO_{4}^{-} + 8H^{+} + n e^{-} \rightarrow Mn^{2+} + 4H_{2}O

    A.

    2

    B.

    3

    C.

    5

    D.

    7

  3. 3.

    Which of these is the correct oxidation state for Phosphorus in PCl5PCl_{5}?

    A.

    +3

    B.

    +5

    C.

    -5

    D.

    0

Download the worksheet for Redox Reactions - Balancing Redox Reactions to practice offline. It includes additional chapter-level practice questions.

Electrode Processes

Subtopic

Electrode Processes under Redox Reactions for Grade 11 ICSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    During the electrolysis of molten NaClNaCl, which species is reduced at the cathode?

    A.

    Cl−Cl^- ions

    B.

    Na+Na^+ ions

    C.

    Cl2Cl_2 gas

    D.

    NaNa metal

  2. 2.

    In the cell Mg∣Mg2+∣∣Ag+∣AgMg | Mg^{2+} || Ag^+ | Ag, which electrode is the cathode?

    A.

    MgMg

    B.

    Mg2+Mg^{2+}

    C.

    AgAg

    D.

    Ag+Ag^+

  3. 3.

    Which of the following is true for an electrolytic cell?

    A.

    Chemical energy is converted to electrical energy

    B.

    It requires an external source of electricity

    C.

    The reaction is spontaneous

    D.

    The anode is negative

Download the worksheet for Redox Reactions - Electrode Processes to practice offline. It includes additional chapter-level practice questions.