H2O2 reduces K3[Fe(CN)6] in:

(1) neutral solution

(2) acidic solution

(3) alkaline solution

(4) non-polar medium

Subtopic:  H2O2 (Hydrogen Peroxide) |
From NCERT
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Tellurium hydride on dissolution in water gives:

(1) H2Te+H2OH3O++HTe-

(2) H2Te+H2OH3Te++OH-

(3) H2Te+H2OTeO+2H2

(4) None of these

Subtopic:  Type of Hydride |
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 Covalent hydride among the following is -

1. NH3 and B2H6

2. CaH2 and B2H6

3. NaH and CaH2

4. NaH and NH3

Subtopic:  Type of Hydride |
 78%
From NCERT
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The conversion of atomic hydrogen into ordinary hydrogen is:

1. exothermic change

2. endothermic change

3. nuclear change

4. photochemical change

Subtopic:  Hydrogen- Types & Isotopes |
 72%
From NCERT
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Nascent hydrogen consists of :

(1) hydrogen atoms with excess energy

(2) hydrogen molecules with excess energy

(3) hydrogen ions in an excited state

(4) solvated protons

Subtopic:  Preparation & Properties |
 74%
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The acidified solution of FeCl3 is reduced by passing:

(1) ordinary H2

(2) O2

(3) nascent H

(4) H2

Subtopic:  Preparation & Properties |
 69%
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Atomic hydrogen produces formaldehyde when it reacts with:

(1) CO2

(2) CO

(3) O2

(4) C2H2

Subtopic:  Hydrogen- Types & Isotopes |
 59%
From NCERT
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The percentage of a para-hydrogen in ordinary hydrogen increases when:

1. temperature is lowered 

2. temperature is increased

3. pressure is increased and temperature decreased

4. none of these

Subtopic:  Hydrogen- Types & Isotopes |
 58%
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Para- hydrogen at room temp is:

1. less stable than ortho- hydrogen

2. more stable than ortho- hydrogen

3. as stable as ortho- hydrogen

4. none of these

Subtopic:  Hydrogen- Types & Isotopes |
 61%
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The hydrogen at the moment of it's formation is called:

1. Atomic

2. Ortho

3. Para

4. Nascent

Subtopic:  Hydrogen- Types & Isotopes |
 66%
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