The lightest gas is :

1. nitrogen

2. helium

3. oxygen

4. hydrogen

Subtopic:  Hydrogen- Types & Isotopes |
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10 volumes of H2O2 has a strength of approximately:

1. 3%

2. 30%

3. 10%

4. 5%

Subtopic:  H2O2 (Hydrogen Peroxide) |
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Which is not true in case of H2O2?

1. It is more stable in basic solution

2. It acts as strong oxidising agent in acid and basic solutions

3. It is decomposed by MnO2

4. It behaves as reducing agent towards KMnO4

Subtopic:  H2O2 (Hydrogen Peroxide) |
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Decmposition of H2O2 is retarded by:

1. acetanilide

2. alcohol

3. H3PO4

4. all of these

Subtopic:  H2O2 (Hydrogen Peroxide) |
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Density of water is maximum at:

1. 0°C

2. 100 °C

3. 4°C

4. 0 K

Subtopic:  Water |
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Atomic hydrogen is obtained by:

1. electrolysis of heavy water

2. reaction of water with heavy metals

3. thermal decomposition of water

4. passing silent electric discharge through hydrogen at low pressure

Subtopic:  Hydrogen- Types & Isotopes |
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Permutit is:

1. hydrated sodium aluminium silicate

2. sodium hexa meta-phosphate

3. sodium silicate

4. sodium meta-aluminate

Subtopic:  Hard & Soft Water |
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Hydrogen is not obtained when zinc reacts with:

1. cold water

2. dil. H2SO4

3. dil HCl

4. hot 20% NaOH

Subtopic:  Hydrogen- Types & Isotopes | Preparation & Properties |
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The volume strength of 1.5N H2O2 Solution is :

1. 4.8

2. 8.4

3. 3.0

4. 8.0

Subtopic:  H2O2 (Hydrogen Peroxide) |
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Very pure hydrogen (99.9%) can be made by which of the following processes ?

1. Mixing natural hydrocarbons of high molecular weight

2. Electrolysis of water

3. Reaction of salt like hydrides with water

4. Reaction of methane with steam

Subtopic:  Preparation & Properties |
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