Disadvantages of hard water:-
Hard water consumes large amount of ……… in washing process.
a) electricity
b) water
c) soap
d) paints
Hard water is unfit to use in …………
a) steam engines
b) boilers
c) both a & b
d) none of these
Accommodation of Ca & Mg in boilers make a constant threat to the ………..
a) corrosion
b) explosion
c) rusting
d) all of these
Use of hard water for drinking purposes for a long time causes………….
a) dysentery
b) stomach diseases
b) intestinal diseases
d) all of these
If magnesium sulphate is present in the hard water. It weakens the …………… function.
a) stomach
b) eyes
c) kidney
d) hears
