An aqueous solution of a halogen salt of potassium reacts with same halogen 'X' to give\['K{{X}_{3}}'\] a violet coloured solution which is used in volumetric exercises (iodimetric titrations). The halogen 'X' is
Aluminium chloride exists as dimer, \[A{{l}_{2}}C{{l}_{6}}\] in solid state as well as in solution of non-polar solvents such as benzene. When dissolved in water, it gives
The electrophile, \[{{E}^{\oplus }}\] attacks the benzene ring to generate the intermediate \[\sigma \]-complex. Of the following, which \[\sigma \]-complex is of lowest energy?
Oxygen reacts with platinum(VI) fluoride, \[Pt{{F}_{6}}\] as follows: \[{{O}_{2}}+Pt{{F}_{6}}\to {{O}_{2}}^{+}Pt{{F}_{6}}^{-}\] It was suggested that xenon should react similarly and, in this way, the first noble gas compound was produced. \[Xe+Pt{{F}_{6}}\to X{{e}^{+}}Pt{{F}_{6}}^{-}\] The most likely reason for the suggestion being made, is
A certain compound containing only carbon and oxygen, has an approximate molecular weight of 290. On analysis, it is found to contain exactly 50% by weight of each element. What is the value of 'n' in the molecular formula\[{{C}_{nx}}{{H}_{ny}}\]?
The internal energy change when a system goes from state 'P' to 'Q' is 40 kJ/mole.
If the system goes from 'P' to 'Q' by a reversible path and returns to state 'P' by an irreversible path, what would be the net change in internal energy?