Chemical Process
Permanent hardness of water can be removed by

All of these
Adding alum
Passing it through cation & anion exchangers
Simply boiling

ANSWER DOWNLOAD EXAMIANS APP

Chemical Process
During the manufacture of sulphuric acid, the temperature of molten sulphur is not increased beyond 160°C, as

None of these
It is very corrosive at elevated temperature
It decomposes on further increasing the temperature
Its viscosity is not reduced on further heating (hence pressure drop on pumping it, cannot be further reduced)

ANSWER DOWNLOAD EXAMIANS APP