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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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

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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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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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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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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Assertion:  D2O is called heavy water.

Reason : Its degree of dissociation is high.

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
Subtopic:  Water |
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NEET 2023 - Target Batch - Aryan Raj Singh
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Assertion : H2O2 has higher boiling point than water.

Reason : The dipole moment of H2O2 is little more than that of H2O.

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
Subtopic:  H2O2 (Hydrogen Peroxide) |
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NEET 2023 - Target Batch - Aryan Raj Singh
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