Chemistry is the study of the substances that make up matter. It looks at their properties, how they react with each other, and how these reactions can create new substances.
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Question 171: Alkaline hydrolysis of naturally occurring fats and oils yields
Options:
A) fats and acids
B) soaps and glycerol
C) margarine and butter
D) esters
E) detergents
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The correct answer is B .
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Question 172: Hardness of water is caused by the presence of ions of
Options:
A) magnesium and silver
B) cacium and magnesium
C) sodium and potassium
D) calcium and sodium
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The correct answer is B .
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Question 173: In the extraction of sodium from fused sodium chloride, the anode is made of platinum because
Options:
A) sodium is formed at the anode
B) chlorine is formed at the anode
C) sodium does not react with platinum
D) chlorine does not react with platinum
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The correct answer is C .
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Question 174:
What is the solubility product constant (Ksp) used for?
Options:
A) To measure the total mass of a solute that can dissolve in a solvent
B) To determine the concentration of a solute in a saturated solution
C) To calculate the solubility of a solute in a given solvent
D) To compare the solubilities of different solutes in the same solvent
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The correct answer is B .
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Question 175: Hardness of water is mainly due to the presence of
Options:
A) calcium hydroxide or magnesium hydroxide
B) calcium trioxocarbonate (IV) or calcium tetraoxosulphate (VI)
C) sodium hydroxide or magnesium ydroxide
D) calcium chloride or sodium chloride salts
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The correct answer is B .
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Question 176:
The IUPAC name of the compound above is
Options:
A) 2,2-dimethyl but -1-yne
B) 2,2-dmethyl but -1-ene
C) 3,3-dimethyl but -1-ene
D) 3,3-dimethyl but-1-yne
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The correct answer is C .
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Question 177:
Use the figure above to answer this question. Which of the following is NOT a monomer?
Options:
A) A
B) B
C) C
D) D
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The correct answer is A .
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Question 178:
In the diagram above, Y is a mixture of
Options:
A) calcium hydroxide and ammonium chloride
B) calcuim hydroxide and sodium chloride
C) sodium chloride and ammonuim trioxonitrate (V)
D) sodium dioxonitrate (lll) and ammouium chloride
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The correct answer is A .
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Question 179:
The elements in the periodic table are listed in order of increasing
Options:
A) relative atomic number
B) atomic mass
C) relative isotopic mass
D) nuclear charge
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The correct answer is B .
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Question 180: A balanced chemical equation obeys the law of?
Options:
A) conservation of mass
B) difinite proportions
C) multiple proportions
D) conservation of energy
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The correct answer is A .