An aqueous solution of SO2 reacts with H2S to precipitate sulfur. Here SO2 acts as:

1. Catalyst

2. Reducing agent

3. Oxidising agent

4. Acid

Subtopic:  Balancing of Equations | Redox Titration & Type of Redox |
 67%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
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Redox reaction among the following is -

1. NaCl + KNO3 NaNO3 + KCl

2. CaC2O4 + 2HCl CaCl2 + H2C2O4

3. Mg(OH)2 + 2NH4Cl MgCl2 + 2NH4OH

4. Zn + 2AgCN 2Ag + Zn(CN)2

Subtopic:  Introduction to Redox and Oxidation Number | Redox Titration & Type of Redox |
 77%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh

Amount of oxalic acid present in a solution can be determined by its titration with KMnO4 solution in the presence of H2SO4. The titration gives unsatisfactory result when carried out in the presence of HCl, because HCl:

1. oxidises oxalic acid to carbon dioxide and water

2. gets oxidised by oxalic acid to chlorine

3. furnishes H+ ions in addition to those from oxalic acid

4. reduces permanganate to Mn2+

Subtopic:  Redox Titration & Type of Redox |
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NEET 2023 - Target Batch - Aryan Raj Singh
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When an acidified solution of ferrous ammonium sulphate is treated with KMnO4 solution, the ion that gets oxidised is:

1. Fe2+

2. SO42-

3. NH4+

4. MnO4-

 

Subtopic:  Oxidizing & Reducing Agents | Redox Titration & Type of Redox |
 74%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh

15 gm Ba(MnO4)2 sample containing inert impurity is completely reacting with 100 ml of '11.2 V' H2O2, then what will be the % purity of Ba (MnO4)2 in the sample ? (Atomic mass Ba = 137, Mn = 55)

(1) 5%

(2) 10%

(3) 50%

(4) none

Subtopic:  Redox Titration & Type of Redox |
 50%
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An excess of NaOH was added to 100 mL of a ferric chloride solution. This caused the precipitation of 1.425 g of Fe(OH)3. Calculate the normality of the ferric chloride solution

(1) 0.20 N

(2) 0.50 N

(3) 0.25 N

(4) 0.40 N

Subtopic:  Redox Titration & Type of Redox |
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NEET 2023 - Target Batch - Aryan Raj Singh
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0.4g of a polybasic acid HnA (all the hydrogens are acidic) requires 0.5g of NaOH for complete neutralization. The number of replaceable hydrogen atoms in the acid and the molecular weight of 'A' would be : (Molecular weight of the acid is 96 gms.)

1. 1, 95

2. 2, 94

3. 3, 93

4. 4, 92

Subtopic:  Equivalent Weight | Redox Titration & Type of Redox |
 60%
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25.0 g of FeSO4.7H2O was dissolved in water containing dilute H2SO4, and the volume was made up to 1.0 L. 25.0 mL of this solution required 20 mL of an N/10 KMnO4 solution for complete oxidation. The percentage of FeSO4. 7H2O in the acid solution is

(1) 78%

(2) 98%

(3) 89%

(4) 79%

Subtopic:  Redox Titration & Type of Redox |
 53%
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25 mL of a solution containing HCl and H2SO4 required 10 mL of a 1 N NaOH solution for neutralization. 20 mL of the same acid mixture on being treated with an excess of AgNO3 gives 0.1425 g of AgCf. The normality of the HC and the normality of the H2SO4 are respectively

(1) 0.40 N and 0.05 N

(2) 0.05 N and 0.35 N

(3) 0.50 N and 0.25 N

(4) 0.40 N and 0.5 N

Subtopic:  Redox Titration & Type of Redox |
 64%
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0.70 g of mixture (NH4)2 SO4 was boiled with 100 mL of 0.2 N NaOH solution till all the NH3(g) evolved and get dissolved in solution itself. The remaining solution was diluted to 250 mL. 25 mL of this solution was neutralized using 10 mL of a 0.1 N H2SO4 solution. The percentage purity of the (NH4)2 SO sample is

(1) 94.3

(2) 50.8

(3) 47.4

(4) 79.8

Subtopic:  Redox Titration & Type of Redox |
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NEET 2023 - Target Batch - Aryan Raj Singh
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