100 ml of a sample of hard water required 25.1 ml of 0.02 (N) H2SO4 for complete reaction. What is the hardness of the given water sample ? (sp. gravity of given water sample = 1 gm/ml)

(A) 200 ppm                                 

(B) 250 ppm

(C) 251 ppm                                 

(D) 258 ppm

Subtopic:  Hard & Soft Water |
 52%
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NEET 2023 - Target Batch - Aryan Raj Singh
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A mixture of hydrazine N2H4 and 58-60% solution of H2O2 is used as.

(1) Antiseptic                     

(2) Fertilizer

(3) Rocket fuel                   

(4) None

Subtopic:  H2O2 (Hydrogen Peroxide) |
 76%
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NEET 2023 - Target Batch - Aryan Raj Singh
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50 lit of hard water of 120 ppm temporary hardness is mixed with 1.62 kg of CaOH2, what is the hardness of the resulting water ? (The sp. gr. of hard water = 1 gm/ml)

(A) 8.088 × 105 ppm                               

(B) 8.088 × 104 ppm

(C) 80 ppm                                             

(D) 808 ppm

Subtopic:  Hard & Soft Water |
 60%
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NEET 2023 - Target Batch - Aryan Raj Singh
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Commercially H2O2 is now prepared by –

(A) Action of H2SO4 on barium peroxide

(B) Action of H2SO4 on sodium peroxide

(C) Electrolysis of H2SO4

(D) By burning hydrogen in excess of oxygen

Subtopic:  H2O2 (Hydrogen Peroxide) |
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NEET 2023 - Target Batch - Aryan Raj Singh
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Hydrogen peroxide does not

(1) Liberate iodide from KI

(2) Turn the titanium salt yellow

(3) Give silver peroxide with moist silver oxide

(4) Turn the mixture of aniline, KClO3 and dilute H2SO4 violet

Subtopic:  H2O2 (Hydrogen Peroxide) |
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

A sample of hard water was found to contain 68 ppm of CaSO4 and 19 ppm of MgCl2. Its total hardness is –

(1) 70 ppm                             

(2) 50 ppm

(3) 20 ppm                             

(4) 100 ppm

Subtopic:  Hard & Soft Water |
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NEET 2023 - Target Batch - Aryan Raj Singh
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A certain sample of hydrogen peroxide is 1.5M solution. It is to be labelled as X volumes. Calculate the value of X.

(1) 16.8 L                             

(2) 11.8 L

(3) 5.3 L                               

(4) 6.2 L

Subtopic:  H2O2 (Hydrogen Peroxide) |
 64%
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NEET 2023 - Target Batch - Aryan Raj Singh
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Find the volume strength of 1.6 N H2O2 solution.

1. 8.96                               

2. 2.16

3. 9.16                               

4. 5.14

Subtopic:  H2O2 (Hydrogen Peroxide) |
 72%
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What mass of hydrogen peroxide is present in 2 litre solution of 4M strength ? Calculate the volume of oxygen at S.T.P. liberated upon complete decomposition of 400 cm3 of the above solution.

(A) 172g, 0.92 L                                   

(B) 272g, 1.32 L

(C) 272g, 17.92 L                                 

(D) 172g, 15.14 L

Subtopic:  H2O2 (Hydrogen Peroxide) |
 51%
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NEET 2023 - Target Batch - Aryan Raj Singh
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30ml of a H2O2 solution after acidification required 30ml of N/10 KMnO4 solution for complete oxidation. Calculate the percentage and volume strength of H2O2 solution.

(A) 2.17%, 2.56                         

(B) 0.17%, 0.56

(C) 5.12%, 3.16                         

(D) 3.12%, 0.86

Subtopic:  H2O2 (Hydrogen Peroxide) |
 64%
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NEET 2023 - Target Batch - Aryan Raj Singh
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