CHM291: Practical Chemistry Iii-inorganic TMA4 complete question and answer

Question 1 : potassium aluminum sulfate dodecahydrate is commonly known as _____
A.  hydrated potassium aluminum sulfate
B.  aluminium
C.  sulfate
D.  alum

Answer to Question 1 is D. Alum

Question 2 : hard water has a hardness value of ____
A.  >200 ppm
B.  >150 ppm
C.  > 250 ppm
D.  >150 ppm

Answer to Question 2 is A. >200 ppm

Question 3 : substances (multi-dentate ligands) whose molecules can form several bonds to a single metal ion are referred to as ____
A.  bonding agents
B.  chelating agents
C.  ligand agents
D.  dentate agents

Answer to Question 3 is B.  Chelating agents

Question 4 : The total mass of each element in a compound depends on the number of its ____
A.  electrons
B.  atoms
C.  neutrons
D.  protons

Answer to Question 4 is B.  Atoms

Question 5 : ______ is the most abundant metal in the earth’s crust
A.  zinc
B.  sodium
C.  lead
D.  Aluminium

Answer to Question 5 is D.  Aluminium

 

Question 6 : only a limited amount of product forms from given amounts of reactants because ____
A.  chemicals react spontaeneously
B.  chemicals react dynamicaly
C.  chemicals react revwesiblly
D.  chemicals react stoichiometrically

Answer to Question 6 is D.  Chemical react stoichiometrically

 

Question 7 : The empirical formula of a strip of aluminum weighing 0.690g is ignited yielding an oxide that weighs 1.300g

Answer to question 7 is Al2O3

CHM203: Organic Chemistry Ii TMA4 complete answer and Question

Question 8 : A titration in which the reaction between the analyte and titrant involves the formation of a complex is known as _____
A.  complex titration
B.  complexation titration
C.  complexometric titration
D.  conplexation titration

Answer to Question 8 is C.  complexometric titration

Question 9 : The limiting reactant involved in a chemical reaction determines the _________
A.  percent yield of product
B.  theoretical yield of reactants
C.  percent yield of reactants
D.  theoretical yield of product

Answer to Question 9 is D.  theoretical yield of product

Question 10 : _______ is composed of atoms of two or more elements chemically combined in definite proportions
A.  chemical compound
B.  atomic nucleus
C.  physical compound
D.  chemical element

Answer to Question 10 is A. chemical compound

Question 11 : alum is also know as _____
A.  hydrated potassium aluminum chloride
B.  hydrated potassium aluminum sulfate
C.  potassium aluminum sulfate
D.  potassium aluminum chloride

Answer to Question 11 is B.  hydrated potassium aluminum sulfate

Question 12 : _____ is prepared from an aqueous solution of ethylenediamine and virtually any cobalt(II) salt
A.  Ethylenediamine cobalt (III) chloride
B.  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
C.  crystals of hydrated potassium aluminum sulfate
D.  Oxidation with an agent such as hydrogen peroxide, iodine, potassium permanganate, lead oxide, or hypochlorite

Answer to Question 12 is A.  Ethylenediamine cobalt (III) chloride

Question 13 : 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 to Question 13 is A.  Deliquescence liquid

Question 14 : 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.  Oxidation with an agent such as hydrogen peroxide, iodine, potassium permanganate, lead oxide, or hypochlorite solution
B.  hydrated potassium aluminum sulfate
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.  Air oxidation, with formation of the pentamine ion, which is converted to the hexamine by heating with aqueous ammonia under pressure

Answer to Question 14 is B.  hydrated potassium aluminum sulfate

Question 15 : What is the product of the reaction between borax and concentrated HCl?
A.  borane
B.  boric acid
C.  boron
D.  borax chloride

Answer to Question 15 is B.  boric acid

Question 16 : the simplest way to express information about the atoms that constitute any given chemical compound is ______
A. atomic nucleus
B.  nuclear reaction
C.  physical formula
D.  chemical formula

Answer to Question 16 is D.  chemical formula

Question 17 : Water with a hardness value of < 60 ppm is considered_______
A.  contaminated
B.  soft
C.  poison
D.  hard

Answer to Question 17 is B.  soft

Question 18 : EDTA means _____
A.  hhc
B.  Ethyleneamine tetra acetic acid
C.  Ethylenediamine tetra acetic base
D.  Ethylenediamine tetra acetic acid

Answer to Question 18 is D.  Ethylenediamine tetra acetic acid

Question 19 : the determination of the ratio of the individual elements in a known mass of the compound is also known as _______
A.  determination of scientific formula
B.  determination of empirical formula
C.  determination of molecular formula
D.  determination of nuclear formula

Answer to Question 19 is B.  determination of empirical formula
Question 20 : What is the product of the reaction between one mole of barium ion, from solution of BaCl2.2H2O and with 1 mole of sulfate ion, from solution of 1 mole of Na2SO4
A.  1 mole of barium sulfate precipitate
B.  1 mole of barium chloride precipitate
C.  1 mole of boric sulfate precipitate
D.  1 mole of barium ammonia precipitate

Answer to Question 20 is A.  1 mole of barium sulfate precipitate

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