An industrial method of preparation of Hydrogen peroxide is -
1. Action of H2SO4 on barium peroxide
2. Action of H2SO4 on sodium peroxide
3. Auto-oxidation of 2-alkylanthraquinols.
4. Burning hydrogen in excess of oxygen
Ionic hydrides are formed by:
1. Transition metals.
2. Elements of very high electropositivity.
3. Elements of very low electropositivity.
4. Metalloids.
Hydrogen combines directly with:
1. Ca
2. Cu
3. Zn
4. Fe
Ionic hydrides react with water to give:
1. Acidic solutions.
2. Basic solutions.
3. Hydride ion.
4. Protons.
A neutral hydride among the following is -
1. H2S
2. H2O
3. H2Se
4. H2Te
When zeolites (hydrated sodium aluminum silicate) is treated with hard water, the sodium ions are exchanged with:
1. H+ ion
2. Ca2+ ion
3. ion
4. OH- ion
The bleaching properties of H2O2 are due to its:
1. Reducing properties
2. Oxidising properties
3. Unstable nature
4. Acidic nature
The correct statement among the following regarding perhydrol is -
1. It is 30% H2O2 or 100 vol. H2O2
2. Its molarity is 8.8 M
3. It is used as an antiseptic and a germicide
4. All of the above
On bubbling CO2 through a solution of barium peroxide in water:
1. O2 is formed
2. H2CO3 is formed
3. H2O2 is formed
4. H2 is formed
H2O2 is prepared in the laboratory by the reaction of :
1. MnO2 with dilute cold H2SO4
2. BaO2 and CO2 bubbling through cold water
3. PbO2 with an acidified solution of KMnO4
4. Na2O2 with boiling water