Softening of hard water

Quiz
•
Science, Chemistry
•
University
•
Hard
Sonaali Borkar
Used 65+ times
FREE Resource
11 questions
Show all answers
1.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Identify water softening methods from following
Reverse Osmosis
Deionisation
Zeolite method
electrodialysis
activated sludge
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In lime soda method the principle is ----
Convert soluble salt into insoluble precipitate
substitute cations and anions of hardness producing salts
replace cations by Na+
none of the above
3.
FILL IN THE BLANK QUESTION
1 min • 1 pt
Anion Exchange and Cation Exchange resins are part of ______________ process.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In an ion exchange process, ions removed from the water are exchanged with ions of _____________ from the resin's surface.
Similar charge (+ ,+)
Opposite charge (+, -)
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Water softened by Deionisation process has residual hardness as --
>50 ppm
> 10 ppm
< 2 ppm
100 ppm
6.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Advantages of ion exchange process are
Highly acidic and basic water can be treated
no sludge formation
cost effective method
compact
skilled supervisor required
7.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Disadvantage of Ion exchange process is --
Costly
more residual hardness
Difficult to operate
Turbidity and suspended particles can block the resin pores
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