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Bronze is preferred to copper in the making of medals because it
is stronger
can withstand low temperature
is lighter
has low tensile strength
The property of concentrated H2SO4 that makes it suitable for preparing HNO3 is its
boiling point
density
oxidizing properties
dehydrating properties
In the laboratory preparation of oxygen, dried oxygen is usually collected over
hydrochloric acid
mercury
calcium chloride
tetraoxosulphate (VI) acid
The bleaching action of chlorine gas is effective due to the presence of
hydrogen chloride
water
air
oxygen
A few drops of concentrated HNO3 is added to an unknown solution and boiled for a while. If this produces a brown solution, the cation presents are likely to be
Pb2+
Cu2+
Fe3+
Fe2+
