In the preparation of hydrogenated oil the chemical reaction involved is called as-
1. Hydrogenation
2. Reduction
3. Dehydration
4. Oxidation
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
Hydrogen is not obtained when zinc reacts with:
1. cold water
2. dil. H2SO4
3. dil HCl
4. hot 20% NaOH
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
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
Which of the following pairs will not produce dihydrogen gas ?
1. Cu + HCl (dil.)
2. Fe + H2SO4
3. Mg + steam
4. Na + alcohol
The metal that does not displace hydrogen from an acid is:
1. Hg
2. Zn
3. Al
4. Ca
The catalyst used in Bosch process of manufacture of H2 is:
1. finely divided Ni
2. V2O5
3. Pd
4. Fe2O3 + Cr2O3
In which reaction hydrogen is not formed ?
(1) Copper and hydrochloric acid
(2) Iron and sulphuric acid
(3) Magnesium and steam
(4) Sodium and alcohol