Related Questions

Fill in the gaps : There is no such thing as chemically pure water ----nature.
A in
B of
C from
D none of these
There is no such things as chemically pure water--- nature.
A in
B of
C from
D none of these
When water itself combines chemically with some element or mineral it is called
A Carbonation
B Desilication
C Hydration
D Oxidation
Dense soda ash used in the manufacture of glass, is chemically represented by
A Na2CO3
B Na2CO3.10H2O
C Na2CO3.H2O
D Na2HCO3
Plexiglass (also called lucite) because of its high optical transparency is used for making lenses. It is chemically
A Polymethyl methacrylate (PMMA)
B Polytetraflouroethylene(PTFE)
C Polycarbonates
D Phenolic resins
Wax used for making candle is chemically a mixture of
A Aliphatic hydrocarbons
B Aromatic hydrocarbons
C Cyclic hydrocarbons
D Aliphatic and aromatic hydrocarbons
Freon used as refrigerant is chemically
A Chlorinated hydrocarbon
B Fluorinated hydrocarbon
C Chlorofluoro hydrocarbon
D Fluorinated aromatic compound
Carborundum used for making crucibles for melting non-ferrous metals is chemically
A Silicon carbide
B Silicon nitride
C Crystalline magnesia
D Zirconium sulphate
During sewage treatment, the sewage is subjected to __________ treatment in Imhoff tank.
A Filtration
B Digestion
C Sedimentation
D Both B and C
The smallest quantity of a substance, which can exist by itself in a chemically recognizable form is known as
A Element
B Compound
C Atom
D Molecule

Next steps