In the reaction Na2S2O3 + 4Cl2 + 5H2O → Na2SO4 + H2SO4 + 8HCI the equivalent weight of Na2S2O3 will be

1. M/4

2. M/8

3. M/1

4. M/2

(M= molecular weight of Na2S2O3)

Subtopic:  Equivalent Weight |
 55%
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NEET 2023 - Target Batch - Aryan Raj Singh
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Which of the following equations is a balanced one

(1) 5BiO3-+ 22H+ + 2Mn2+ → 5Bi3+ + 7H2O + 2MnO4

(2)5BiO3- + 14H+ + 2Mn2+ → 5Bi3+ + 7H2O + 2MnO4

(3)2BiO3- + 4H+ + 2Mn2+ → 6Bi3+ + 2H2O + MnO4

(4) 6BiO3-+ 12H+ + 2Mn2+ → 6Bi3+ + 6H2O + 2MnO4

Subtopic:  Balancing of Equations |
 80%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
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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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In the reaction CrO5 + H2SO4 → Cr2(SO4)3 + H2O + O2

The number of moles of O2 liberated by one mole of CrO5 will be -

1. 5/2

2. 5/4

3. 9/2

4. None of the above

Subtopic:  Oxidizing & Reducing Agents | Equivalent Weight |
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

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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NEET 2023 - Target Batch - Aryan Raj Singh
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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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NEET 2023 - Target Batch - Aryan Raj Singh
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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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NEET 2023 - Target Batch - Aryan Raj Singh
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If 10 gm of V2O5 is dissolved in acid and is reduced to V2+ by zinc metal, how many moles of I2 could be reduced by the resulting solution if it is further oxidized to VO2+ ions?

[Assume no change in state of Zn2+ions] (V = 51, O =16, I = 127) :

1. 0.11 mole of I2 2. 0.22 mole of I2
3. 0.055 mole of I2 4. 0.44 mole of I2
Subtopic:  Balancing of Equations |
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

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
Hints

A mixed solution of potassium hydroxide and sodium carbonate required 15 mL. of an N/20 HCI solution when titrated with phenolphthalein as an indicator. But the same amount of the solution when titrated with methyl orange as an indicator required 25 mL of the same acid. The amount of KOH present in the solution is

(1) 0.014g

(2) 0.14g

(3) 0.028g

(4) 1.4 g

Subtopic:  Equivalent Weight |
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NEET 2023 - Target Batch - Aryan Raj Singh
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