Maximum concentration of ortho-H2 in ordinary hydrogen is:

(1) 75% ortho-H2 + 25% para-H2

(2) 25% ortho-H2 + 75% para-H2

(3) 50% ortho-H2 + 50% para-H2

(4) 99% para-H2 + 1% ortho-H2

Subtopic:  H2O2 (Hydrogen Peroxide) |
 76%
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Hydrogen will not reduce-

(1) heated cupric oxide                                 

(2) heated ferric oxide

(3) heated stannic oxide                               

(4) heated aluminium oxide

Subtopic:  Preparation & Properties |
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The first ionization energy value kJ mol-1 for H, Li, F, and Na 

is given below but not in a correct order

1681, 520, 1312, 495.

The ionization energy value of H would be -

1. 1681                                 

2. 1312

3. 520                                   

4. 485

Subtopic:  Preparation & Properties |
 61%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh

The hydrides ion H- is a stronger base than its hydroxide ion OH-. Which of the following reactions will occur if sodium hydride NaH is dissolved in water –

(A) H-aq+H2OH3O-aq

(B) H-aq+H2OlOH-aq+H2g

(C) H-aq+H2OlNo reaction

(D) None of these

Subtopic:  Type of Hydride |
 77%
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Blackened oil planting can be restored into original form by the action of:

1. Chlorine

2. BaO2

3. H2O2

4. MnO2

Subtopic:  Hydrogen- Types & Isotopes | H2O2 (Hydrogen Peroxide) |
 76%
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Which of the following statement regarding H2O2 is wrong.

(1) It is stable in acid medium

(2) It acts as oxidising as well as reducing agent

(3) It has zero dipole moment

(4) Pure H2O2 is slightly acidic

Subtopic:  H2O2 (Hydrogen Peroxide) |
 67%
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Polyphosphates are used as water softening agents because they –

(1) form soluble complexes with anionic species

(2) precipitate anionic species

(3) form soluble complexes with cationic species

(4) precipitate cationic species

Subtopic:  Hard & Soft Water |
 56%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh

Permanent hardness of water can be removed, by adding –

(1) Soda lime

(2) Sodium bicarbonate

(3) Washing soda

(4) Sodium chloride

Subtopic:  Hard & Soft Water |
 75%
From NCERT
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The correct increasing order of the acidity of CO2, H2O and H2O2 is -

(1) CO2<H2O2<H2O                         

(2) H2O<H2O2<CO2

(3) H2O<H2O2>CO2                         

(4) H2O2>CO2>H2O

Subtopic:  Preparation & Properties |
 59%
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At absolute zero.

(1) Only para hydrogen exists

(2) Only ortho hydrogen exists

(3) Both para and ortho hydrogen exist

(4) None of these

Subtopic:  Hydrogen- Types & Isotopes |
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NEET 2023 - Target Batch - Aryan Raj Singh
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