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 581: Which of the following contains two amphoteric oxides?
Options:
A) sodium oxide, Zinc oxide , Magnesium oxide
B) Aluminium oxide, Calcium oxide, Zinc oxide
C) Potassium oxide, Lithium oxide, Carbon monoxide
D) Silver oxide, Lead oxide, Sodium oxide
E) Sulphur dioxide, Aluminium oxide, Carbon monoxide
Show Answer
The correct answer is B .
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Question 582:
Wrought iron is obtained by heating cast iron in a furnace with?
Options:
A) magnetite
B) haematite
C) carbon(ii)oxide
D) calcium trioxosilicate(iv)
Show Answer
The correct answer is B .
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Question 583: Aluminium is extracted commercially from its ore by?
Options:
A) heating aluminium oxide with coke in a furance
B) the electrolysis of fused aluminium oxide in cryolite
C) treating cryolite with sodium hydroxide solution under prressure
D) heating sodium aluminium silicate to a high temperature
Show Answer
The correct answer is B .
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Question 584: In an endothermic reaction, if there is a loss in entropy the reaction will
Options:
A) be indeterminate
B) be spontaneous
C) not be spontaneous
D) be at equilibrium
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The correct answer is C .
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Question 585: A given mass of gas occupies 2dm3 at 300k. At what temperature will its volume be doubled, keeping the pressure constant?
Options:
A) 400k
B) 480k
C) 550k
D) 600k
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The correct answer is D .
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Question 586: A mixture of iodine and sulphur crystals can be separated by treatment with
Options:
A) water to filter off sulphur
B) carbon (IV) suiphide to filter off iodine
C) ethanoic acid to filter off sulphur
D) methanol to filter off iodine
Show Answer
The correct answer is B .
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Question 587:
Duralumin consists of aluminum, copper?
Options:
A) Zinc and Gold
B) Lead and Manganese
C) Nickel and Silver
D) Manganese and Magnesium
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The correct answer is D .
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Question 588: Ethanoic acid is
Options:
A) tribasic
B) unionizeable
C) monobasic
D) dibasic
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The correct answer is C .
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Question 589:
The IUPAC name of the compound CFCHBrCl is
Options:
A) 2-chloro-2-bromo-1,1,1-trifluoroethane
B) 2-bromo-2-chloro-1,1,1-trifluoroethane
C) 1-bromo-1-chloro-2,2,2-trifluoroethane
D) 1,1,1-trifluoro-2-bromo-2-chloroethane
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The correct answer is B .
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Question 590:
Which of the gas laws does the above graph illustrate?
Options:
A) Boyle
B) Charles
C) Graham
D) Gay-Lussac
Show Answer
The correct answer is B .