Hard water has a hardness value of ____
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EDTA means _____
A. Ethylenediamine tetra acetic acid
B. Ethyleneamine tetra acetic acid
C. hhc
D. Ethylenediamine tetra acetic base
Answer: A
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Potassium aluminum sulfate dodecahydrate is commonly known as _____
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The method of air drying is safe in all solid except in_______
A. Deliquescence liquid
B. Deliquescence solid
C. Small quantity of solid
D. Large quantity of solid
Answer: B
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Substances (multi-dentate ligands) whose molecules can form several bonds to a single metal ion are referred to as ____
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Water with a hardness value of < 60 ppm is considered_______
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______ is the most abundant metal in the earth's crust
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alum is also know as _____
A. potassium aluminum chloride
B. potassium aluminum sulfate
C. hydrated potassium aluminum sulfate
D. hydrated potassium aluminum chloride
Answer: C
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Hexaamminecobalt(III) salts may be prepared by any of these three methods which depends the on oxidation of cobalt(II) ion in ammoniacal solution except _____
A. Air oxidation, with formation of the pentamine ion, which is converted to the hexamine by heating with aqueous ammonia under pressure
B. Oxidation with an agent such as hydrogen peroxide, iodine, potassium permanganate, lead oxide, or hypochlorite solution
C. Oxidation in the presence of a catalyst that allows equilibrium between the pentamine and hexamine ions to be established at room temperature and atmospheric pressure
D. Hydrated potassium aluminum sulfate
Answer: D
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_____ is prepared from an aqueous solution of ethylenediamine and virtually any cobalt(II) salt
A. Ethylenediamine cobalt (III) chloride
B. Oxidation with an agent such as hydrogen peroxide, iodine, potassium permanganate, lead oxide, or hypochlorite
C. Oxidation in the presence of a catalyst that allows equilibrium between the pentamine and hexamine ions to be established at room temperature and atmospheric pressure
D. Crystals of hydrated potassium aluminum sulfate
Answer: A
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