On bubbling CO2 through a solution of barium peroxide in water:

1. O2 is formed

2. H2CO3 is formed

3. H2O2 is formed

4. H2 is formed

Subtopic:  H2O2 (Hydrogen Peroxide) |
 75%
From NCERT
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Temporary hardness is caused due to the presence of:

1. CaSO4

2. CaCl2

3. CaCO3

4. Ca(HCO3)2

Subtopic:  Hard & Soft Water |
 78%
From NCERT
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A 1000 g aqueous solution of CaCO3 contains 10 g of calcium carbonate. The hardness of the solution is:

1. 10 ppm

2. 100 pm

3. 1000 ppm

4. 10000 ppm

Subtopic:  Hard & Soft Water |
 55%
From NCERT
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Hydrogen adsorbed on palladium is known as:

1. Atomic H

2. Nascent H

3. Occluded H

4. Heavy H

Subtopic:  Hydrogen- Types & Isotopes |
 50%
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A compound that acts as both reducing and oxidising agent is-

1. H2SO4

2. H2O2

3. KOH

4. KMnO4

Subtopic:  H2O2 (Hydrogen Peroxide) |
 93%
From NCERT
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A given solution of H2O2 is 30 volume. Its concentration in terms of molarity is:

1. 9.1 M

2. 2.68 M

3. 2.5 M

4. 26.8 M

Subtopic:  H2O2 (Hydrogen Peroxide) |
 65%
From NCERT
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The decomposition of H2O2 is accelerated by:

1. traces of acids

2. finely divided metals

3. acetanilide

4. alcohol

Subtopic:  H2O2 (Hydrogen Peroxide) |
 67%
From NCERT
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 Hardness of water cannot be removed by -

1. Clark's method

2. Adding washing soda

3. Calgon process

4. Filtration

Subtopic:  Hard & Soft Water |
 85%
From NCERT
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The correct statement among the following regarding perhydrol is -

1. It is 30% H2O2 or 100 vol. H2O2

2. Its molarity is 8.8 M

3. It is used as an antiseptic and a germicide

4. All of the above

Subtopic:  H2O2 (Hydrogen Peroxide) |
 82%
From NCERT
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An aqueous solution of hydrogen peroxide is:

1. alkaline

2. neutral

3. strongly acidic

4. weakly acidic

Subtopic:  H2O2 (Hydrogen Peroxide) |
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