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Redox Reactions Chemistry - Redox Reactions

Maharashtra Board - STD 11 - Chemistry (MSBSHSE - Semi English Medium). 113 questions in this chapter.

Question types

Redox Reactions question types

113 questions across 5 question groups — pick any mix to generate a Chemistry paper with step-by-step answer keys.

113
Questions
5
Question groups
5
Question types
Sample Questions

Redox Reactions questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1MCQ1 Mark
Identify the correct statement from following.
  • ✓
    Hydrogen exhibits oxidation number -1 and +1.
  • B
    Oxidation number of oxygen is -2 in all of its compounds.
  • C
    Hydrogen has same ionisation enthalpy as alkali metals.
  • D
    Hydrogen has same electronegativity as halogens.

Answer: A.

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Q 2MCQ1 Mark
Identify correct statement for following reaction.
$3 Br _2+6 CO _3^{2-}+3 H _2 O \rightarrow 5 Br ^{-}+ BrO _3^{-}+6 HCO _3^{-}$
  • A
    Bromine is oxidised and carbonate is reduced.
  • ✓
    Bromine is both reduced and oxidised.
  • C
    Bromine is neither reduced nor oxidised.
  • D
    Bromine is reduced and water is oxidised.

Answer: B.

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Q 5MCQ1 Mark
What is oxidation state of $\mathrm{Cl}$ in $\mathrm{KClO}_3$ ?
  • ✓
    $+5$
  • B
    $-1$
  • C
    -5
  • D
    +1

Answer: A.

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Q 13Answer the following in one or two sentences.2 Marks
For the reaction, $SeO _{3( aq )}^{2-}+ Cl _{2( g )}+2 OH _{( aq )}^{-} \longrightarrow SeO _{4( aq )}^{2-}+2 Cl _{( aq )}^{-}+ H _2 O _{( l )}$, complete the following table.
Oxidising agent_____________
Reducing agent_____________
Oxidised species_____________
Reduced species_____________
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Q 16Answer the following in brief.3 Marks
Assign oxidation number to the underlined species and write Stock notation of compound
Compound Oxidation number Stock notation
$AuCl_3$ …………….. ……………..
$SnCl_2$ …………….. ……………..
$V––2O4−7$ …………….. ……………..
$Pt–––Cl2−6$ …………….. ……………..
$H_3AsO_3$​​​​​​​ …………….. ……………..
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Q 18Answer the following in brief.3 Marks
Complete the following table of displacement reactions. Identify oxidising and reducing agents involved.
Reactants Products
$Zn_{(s)} +$ ————$_{(aq)}$ ————$-_{(aq)} + Cu_{(s)}$
$Cu_{(s)} + 2Ag^+_{(aq)}$ —————–$ +$————–
———– $+$ ————- $Co _{( aq )}^{2+}+ Ni _{( s )}$
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Q 21Answer the following questions.4 Marks
Justify that the following reactions are redox reaction; identify the species oxidized/reduced, which acts as an oxidant and which act as a reductant.
a. $ 2Cu_2O_{(s)} + Cu_2S_{(s)} \rightarrow 6Cu_{(s)} + SO_{2(g)}$
b. $ HF_{(aq)} + OH^–_{(aq)} \rightarrow H_2O_{(l)} + F^–_{(aq)}$
c. $I_{2(aq)} + {2 S_2O_3^{2-}}_{(aq)} \rightarrow {S_4O_6^{2-}}_{(aq)} + 2I^–_{(aq)}$
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