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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NEET 2023 - Target Batch - Aryan Raj Singh
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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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NEET 2023 - Target Batch - Aryan Raj Singh
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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
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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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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

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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NEET 2023 - Target Batch - Aryan Raj Singh
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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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Metal which does not react with cold water but evolves H2 with steam is –

(1) Na                           

(2) K

(3) Pt                             

(4) Fe

Subtopic:  Preparation & Properties |
 55%
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NEET 2023 - Target Batch - Aryan Raj Singh
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The oxidation states of the most electronegative element in the products of the reaction between BaO2 with dil. H2SO4 are–

1. 0, and –1                                   

2. –1, and –2

3. –2, and 0                                     

4. –2, and + 1

Subtopic:  H2O2 (Hydrogen Peroxide) |
 63%
From NCERT
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Links
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NEET 2023 - Target Batch - Aryan Raj Singh

Hardness of water is due to presence of salts of –

(1) Na+ and K+                                  

(2) Ca2+ and Mg2+

(3) Ca2+ and K+                                 

(4) Ca2+ and Na+

Subtopic:  Hard & Soft Water |
 96%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

Ice melts at a temperature lower than its usual melting point when the pressure is increased. This is because-

1. Ice has less density than water

2. Pressure generates heat

3. The chemical bonds break under pressure

4. Ice is not a true solid

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