The formation of atomic hydrogen from molecular hydrogen will be favoured most at ?
1. High temperature and high pressure
2. Low temperature and low pressure
3. High temperature and low pressure
4. Low temperature and high pressure
The bleaching properties of H2O2 are due to its:
1. Reducing properties
2. Oxidising properties
3. Unstable nature
4. Acidic nature
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
An aqueous solution of hydrogen peroxide is:
1. alkaline
2. neutral
3. strongly acidic
4. weakly acidic
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
Temporary hardness is caused due to the presence of:
1. CaSO4
2. CaCl2
3. CaCO3
4. Ca(HCO3)2
A 1000 g aqueous solution of CaCO3 contains 10 g of calcium carbonate. The hardness of the solution is:
1. 10 ppm
2. 100 pm
3. 1000 ppm
4. 10000 ppm
Hydrogen adsorbed on palladium is known as:
1. Atomic H
2. Nascent H
3. Occluded H
4. Heavy H