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Q. Name the various steps required for making water suitable for domestic use.
Ans. Treatment process for domestic use
S. No.
Process use for treatment
Impurities removed
1.
screening
Floating materials like sand, clay etc.
2.
Sedimentation with coagulation
Fine suspended inorganic matter
3.
Filtration
Colloidal impurities and larger organisms
4.
Disinfection
Pathogenic bacteria
5.
sedimentation
Suspended impurities like sand, clay etc.
When 100ml of M/10 h2so4 is mixed with 500 ml of M/10 naoh then nature of resulting solution and normality of excess of reatant left is 1)Acidic,N/5 2)basic ,N/5 3)Acidic,N/20 3)ac
A metal surface is exposed to solar radiations: (1) The emitted electrons have energy less than a maximum value of energy depending upon frequency of incident radiations
what is crystallisation
Why do zinc hydroxide, aluminium hydroxide and lead (II) hydroxide dissolve in excess aqueous sodium hydroxide?
CHANGE IN EMF IN A DANIEL CELL
why ionisation energy of aluminium is greater then Ga?
The electronic configuration of a metal M is 1s 2 , 2s 2 , 2p 6 , 3s 1 , The formula of its oxides will be: (1) MO (2) M
Uses of Resorcinol (a) Resorcinol is used as antiseptic and for creating dyes. (b) Resorcinol is also used in the medicine of eczema. 2, 4, 6-trinitroresorcinol is required
are you a pancake
Determine the alcoholic acidity of the given sample of flour. After undertaking this activity, you will be able to: • assess the acidity the given sample of flour, and •
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