Ionic hydrides react with water to give:

1. Acidic solutions.

2. Basic solutions.

3. Hydride ion.

4. Protons.

Subtopic:  Type of Hydride |
 59%
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A neutral hydride among the following is -

1. H2S

2. H2O

3. H2Se

4. H2Te

Subtopic:  Type of Hydride |
 80%
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Which is used to determine hardness of water volumetrically ?

1. H2C2O4

2. Na2S2O3

3.Sod. citrate

4. Di sodium salt of EDTA

Subtopic:  Hard & Soft Water |
 59%
From NCERT
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The ratio of electron, proton and neutron in tritium is:

1. 1:1:1

2. 1:1:2

3. 2:1:1

4. 1:2:1

Subtopic:  Preparation & Properties |
 82%
From NCERT
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Both temporary and permanent hardness are removed on boiling water with:

1. Ca(OH)2

2. Na2CO3

3. CaCO3

4. CaO

Subtopic:  Hard & Soft Water |
 55%
From NCERT
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When H2O2 is added to acidic ferrous sulphate solution:

1. electrons are gained by Fe2+

2. electrons are lost by Fe2+

3. there is no loss or gain of electrons

4. iron hydroxide precipitates

Subtopic:  H2O2 (Hydrogen Peroxide) |
 69%
From NCERT
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Which of the following pairs will not produce dihydrogen gas ?

1. Cu + HCl (dil.)

2. Fe + H2SO4

3. Mg + steam

4. Na + alcohol

Subtopic:  Preparation & Properties |
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When zeolites (hydrated sodium aluminum silicate) is treated with hard water, the sodium ions are exchanged with:

1. H+ ion

2. Ca2+ ion

3. SO42- ion

4. OH- ion

Subtopic:  Hard & Soft Water |
 68%
From NCERT
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 The formation of atomic hydrogen from molecular hydrogen will be favoured most at ?

1. High temperature and high pressure

2. Low temperature and low pressure

3. High temperature and low pressure

4. Low temperature and high pressure

Subtopic:  Hydrogen- Types & Isotopes |
 65%
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The bleaching properties of H2O2 are due to its: 

1. Reducing properties

2. Oxidising properties

3. Unstable nature

4. Acidic nature

Subtopic:  H2O2 (Hydrogen Peroxide) |
 68%
From NCERT
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