Which of the following is a redox reaction ?
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Redox Reactions MCQs for NEET — Chemistry Questions with Answers
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Which of the following is a correct ascending order, when oxidation no. of sulphur of $ H_2SO_3, H_2S_2O_3, H_2S_2O_7, H_2S_2O_8 $ or sulphurus acid, thio sulphuric acid, oleum, dithianic acid is arranged in ascending order ?
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Explanation
To determine the oxidation state of sulfur in each compound:
- In $H_2SO_3$ (Sulfurous acid), the oxidation state of S is +4.
- In $H_2S_2O_3$ (Thiosulfuric acid), it has +2 and +6 oxidation states of sulfur, so the average is +2.
- In $H_2S_2O_7$ (Oleum), the oxidation state of S is +6.
- In $H_2S_2O_8$ (Peroxydisulfuric acid), the oxidation state of S is +7. Thus, the correct ascending order is $ H_2S_2O_3 ightarrow H_2SO_3 ightarrow H_2S_2O_6 ightarrow H_2S_2O_7 $.
In the sample of iron oxide, the no. of $ Fe^{2+} $ ion is 90% and no. of is 10% then what is the molecular formula ?
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The oxidation no. of sulphur in $ Al_2(SO_4)_3 $ is
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Explanation
To find the oxidation number of sulfur in \( Al_2(SO_4)_3 \), we need to consider the oxidation states of all the elements in the compound.
- Aluminum (Al) has an oxidation state of +3.
- Oxygen (O) typically has an oxidation state of -2.
The compound \( Al_2(SO_4)_3 \) can be broken down as follows:
\[ 2 imes (+3) + 3 imes (x + 4 imes (-2)) = 0 \]
Solving for x (the oxidation state of sulfur, S):
\[ 2 imes 3 + 3 imes (x - 8) = 0 \] \[ 6 + 3x - 24 = 0 \] \[ 3x - 18 = 0 \] \[ 3x = 18 \] \[ x = 6 \]
Therefore, the oxidation number of sulfur in \( Al_2(SO_4)_3 \) is +6.
In a balanced equation, $ aP(S) + bH_2O + CO_2 \rightarrow dH_3PO_4 +CO_2 $ ,oxidation no. of oxygen decreases 30, then c -e= ______
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In balanced equation, $ aCu_2S + bNO_3 ^- cH^+ \rightarrow 12Cu^{2+} + eSO_4 ^{2–} + fNO + gH_2O $ then what will be the change in oxidation no. and the value of b and g respectively ?
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Mention the oxidation reaction takes place in half cell $Pt ∣ H_{2(g,1.0 bar)} ∣ OH−^_{(aq)} $ .
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Explanation
In the half-cell Pt|H2(g,1.0 bar)|OHâ»(aq), the oxidation reaction taking place is: H2(g) + 2OH⻠⇌ 2H2O(l) + 2eâ». This is the hydrogen oxidation reaction, which occurs at the platinum electrode in an alkaline solution.
A Sulphur containing species that cannot be a reducing agent is
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A reducing agent is a substance which can
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Which sabstance can be easily poored form one container into the other at room temperature ?
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