The maximum possible number of hydrogen bonds a water molecule can form is –

(1) 2                                         

(2) 4

(3) 3                                         

(4) 1

Subtopic:  Water |
 70%
Level 2: 60%+
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H2O2 acts as antiseptic due to its –

(1) Reducing property                           

(2) Oxidising property

(3) Bleaching property                           

(4) Acidic property

Subtopic:  H2O2 (Hydrogen Peroxide) |
 55%
Level 3: 35%-60%
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A compound that has both polar and non-polar bonds is  –

1. NH4Cl                                    

2. HCN

3. H2O2                                     

4. CH4

Subtopic:  H2O2 (Hydrogen Peroxide) |
 79%
Level 2: 60%+
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The most reactive state of hydrogen is –

(1) Atomic hydrogen                               

(2) Heavy hydrogen

(3) Molecular hydrogen                           

(4) Nascent hydrogen

Subtopic:  Hydrogen- Types & Isotopes |
Level 3: 35%-60%
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In which of the following reactions is H2O2 acting as an acid.

(A) 2KMnO4+3H2SO4+5H2O2K2SO4+MnO4+2MnSO4+8H2O+5O2

(B) 2K3FeCN6+2KOH+H2O22K4FeCN6+2H2O+O2

(C) O3+H2O2H2O+2O2

(D) BaOH2+H2O2BaO2+H2O

Subtopic:  H2O2 (Hydrogen Peroxide) |
Level 3: 35%-60%
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Exhausted permutit does not contain ............ ion –

(A) Na+                                      

(B) Mg2+

(C) Al3+                                    

(D) Si4+

Subtopic:  Hard & Soft Water |
 55%
Level 3: 35%-60%
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Which of the following metal cannot absorb hydrogen –

(1) Pd                                     

(2) Al

(3) Ni                                     

(4) Co

Subtopic:  Hydrogen- Types & Isotopes |
 62%
Level 2: 60%+
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The best explanation for not placing hydrogen with the group of alkali metals or halogens is.

1. Hydrogen can form compounds with all other elements

2. Hydrogen is much lighter element than the alkali metals or the halogens

3. The IE of hydrogen is too high for group of alkali metals but too low for halogen group

4. None of these

Subtopic:  Hydrogen- Types & Isotopes | Preparation & Properties |
 63%
Level 2: 60%+
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The colour of hydrogen is –

1. Blue                           

2. Yellow

3. Orange                       

4. No colour

Subtopic:  Hydrogen- Types & Isotopes |
 91%
Level 1: 80%+
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In which of the following compounds, hydrogen exists in the atomic state –

1. Metallic hydrides                           

2. Ionic hydrides

3. Molecular hydrides                       

4. Water

Subtopic:  Hydrogen- Types & Isotopes | Preparation & Properties |
 52%
Level 3: 35%-60%
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