Frequently Asked Questions
The catalyst used in contact process is
By contact process, H2SO4(Sulphuric acid) is prepared in presence of V2O5(Vanadium oxide).
SO2 (g)+1/2O2 (g) SO3 (g)
(Sulphur dioxide) (Oxygen) (Sulphur trioxide)
The catalyst in the above reaction is V2O5.
Hence, Option (C) is correct.
What is collodion
Collodion is a flammable, syrupy 4% solution of Nitro cellulose prepared in a mix of alcohol and ether.
Collodion solutions are of two types:
The two types of collodions find different kinds of utility, e.g: Flexible collodion solutions are used in surgical dressings whereas Non-flexible collodion is used in theatrical make-up, photography, etc.
Collodion solutions also find utility in:
Nail polish, etc.
Final Answer: Collodion solution is a solution of nitrocellulose in ether and alcohol.
Aluminium crystallises in a cubic close packed structure
Its metallic radius is 125 pm.(i) What is the length of the side of the unit cell?(ii) How many unit cells are there in 1.00 cm3 of aluminium?
The length of the side of the unit cell =354pm
The number of unit cells in 1.00 cm^3 of aluminium =2.27×1022
Draw the structure of and identify the number
of single P - O bonds .P4O6
It is the anhydride of orthophosphoric acid, (phosphorus trioxide) therefore also known as phosphorous oxide or phosphorous anhydride. P4O6
It is a solid soft white color. It is an anhydride of an acid so it behaves as an acidic and will hydrolyze in water to generate phosphorous acid. Phosphorus trioxide is a dimer with the formula . P4O6
Structure of can be shown as: P4O6
Number of single P-O bonds are 12 as shown in the figure.
If NaCl is doped with 10-3 mol percent
of What is the concentration of cation vacancies?SrC12
NaCl is doped with 10-3 mol percent of SrC12
Then we can define that 100 moles of NaCl are doped with 0.001 moles of SrC12
Thus 1 mole of NaCl is doped with 0.001/100=10-5 moles of SrC12
This can also be defined as 10-5 moles of Sr2+ cations.
This defines that one Sr2+ ion creates one cation vacancy.
So 10-5 moles of Sr2+ will create 10-5 moles of cation vacancies which will be calculated by just multiplying it by avogadro number
Final answer: Thus, 6.0221018 cation vacancies per mole of NaCl.