The most abundant isotope of hydrogen is-
1. Tritium
2. Deuterium
3. Protium
4. Para-hydrogen
Hydrogen is evolved by the action of cold dilute HNO3 on:
1. Fe
2. Mg or Mn
3. Cu
. Al
A molten ionic hydride on electrolysis gives:
1. H+ ion moving towards the cathode.
2. H+ ion moving towards the anode.
3. H2 is liberated at anode.
4. H2 is liberated at cathode.
In solid hydrogen, the intermolecular bonding is:
1. ionic
2. van der Waals'
3. metallic
4. covalent
The lightest gas is :
1. nitrogen
2. helium
3. oxygen
4. hydrogen
10 volumes of H2O2 has a strength of approximately:
1. 3%
2. 30%
3. 10%
4. 5%
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
Decmposition of H2O2 is retarded by:
1. acetanilide
2. alcohol
3. H3PO4
4. all of these
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