The number of gram molecules of chlorine in 6.02 × 1025 hydrogen chloride molecules is
10
100
50
5
When conc. H2SO4 is heated with P2O5, the acid is converted into
sulphur trioxide
sulphur dioxide
sulphur
a mixture of sulphur dioxie and sulphur trioxide
The noble gas mixture is cooled in a coconut bulb at 173 K. The gases that are not adsorbed are
Ne and Xe
He and Xe
Ar and Kr
He and Ne
D.
He and Ne
When the mixture of noble gas is cooled in a coconut bulb at 173 K then Ar, Kr and Xe are adsorbed on charcoal while He and Ne are not adsorbed.
Excess of PCl5 reacts with conc. H2SO4 giving
chlorosulphonic acid
thionyl chloride
sulphuryl chloride
sulphurous acid
Helium is used in balloons in place of hydrogen because it is
incombustible
lighter than hydrogen
radioactive
more abundant than hyrogen
In the brown ring test, the brown colour of the ring is due to
ferrous nitrate
ferric nitrate
a mixture of NO and NO2
nitrosoferrous sulphate
In which of the following, NH3 is not used?
Tolles's reagent
Nessler's reagent
Group reagent for the analysis of IV group basic radicals
Group reagent for the analysis of III group basic radicals
Argon is used
in filling airships
to obtain low temperature
in high temperature welding
in radiotherapy for treatment of cancer