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Chemistry Class 10 Chapter 11 - Homeostasis - 4
1.
the clark's method to remove the temporary hardness of water is the?
Addition of washing soda
Boiling the water
Addition of slacked lime
Removal of slacked lime
2.
which one of the following is the method to remove permanent Hardness of water?
Addition of washing soda
None of these
Ion exchange resins
Both of these
3.
which one of the following is the disadvantage of hard water?
Block hot water pipes and boilers
Scum adheres to the clothes
Wastes a lot of soap
All of these
4.
which one of the following is not a bacterial disease?
Tuberculosis
Cholera
Measles
Typhoid
5.
which one of the following is a house hold waste?
Detergents
Cr
Pd
Hg
6.
the process in which water is allowed to stand in a reservoirs and The suspended matter sinks to the bottom is known as?
Sedimentation
Chlorination
Coagulation
Filteration
7.
the process in which the water is treated with slaked lime and Alum is known as?
Sedimentation
Filteration
Coagulation
Chlorination
8.
the addition of chlorine to water to kill the bacteria is known as?
Chlorination
Sedimentation
Coagulation
Filteration
9.
the sewage treatment in which the waste water is allowed to stand In a large sedimentation tank to remove the suspended particles is The?
Primary sewage treatment
Activated sludge treatment
Secondary sewage treatment
Chlorination
10.
chlorination is not effective against?
Both of these
Viruses
Bacteria
None of these
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