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 631: An eruption pollution an environment with gas suspected to be H2S, a poisonous gas. A residue team should spray the environment with?
Options:
A) water
B) moist SO2
C) acidified KMnO4 and water
D) water, acidified KMnO4 and oxygen
Show Answer
The correct answer is B .
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Question 632:
The compound above is the product of the oxidation of
Options:
A) 2-methlbutan-2-ol
B) 2-methylbutan -1- ol
C) 2, 3-dimethylprop 1-ol
D) Pentan -2- ol
Show Answer
The correct answer is B .
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Question 633: In the reaction E+F ↔ G+H, the backward reaction is favoured if the concentration of
Options:
A) F is increased
B) E is increased
C) E is reduced
D) G is reduced
Show Answer
The correct answer is C .
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Question 634:
How many grams of methylacetylene (propyne) CH3 - C Ξ CH will completely discharge the colour of 8g of bromine?
(Br = 80, C = 12, H = 1)
Options:
A) 0.5
B) 1.0
C) 2.0
D) 3.0
E) 4.0
Show Answer
The correct answer is B .
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Question 635: When platinum electrodes are used during the electrolysis of copper (ll) tetraoxosulphate (lV) solution, the solution gets progressively?
Options:
A) acidic
B) basic
C) neutral
D) amphoteric
Show Answer
The correct answer is A .
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Question 636: The filter in the cigarette reduce the nicotine construct by
Options:
A) burning
B) absorption
C) evaporation
D) absorption
Show Answer
The correct answer is A .
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Question 637: Rare gases are suitable because they
Options:
A) are monoatomic
B) form ions easily
C) have duplet or octet electronic configuration in the outermost shells in their atoms
D) are volatile gases
Show Answer
The correct answer is C .
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Question 638: The reaction that takes place in Daniell cell is
Options:
A) direct combination
B) redox
C) double decomposition
D) neutralization
Show Answer
The correct answer is B .
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Question 639: Which of the following water samples will have the highest titre value when titrated for the Ca2+ ions using soap solution?
Options:
A) Permanently hard water after boiling
B) emporarily hard water after boiling
C) Rain water stored in a glass jar for two years
D) Permanent hard water passed through permuitit
Show Answer
The correct answer is A .
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Question 640: When sodium hydroxide is heated with ammonium tetraoxosulphate (IV), the gas given off may be collected by?
Options:
A) bubbling it through concentrated H2SO2
B) bubbling it through water and then passing it through calcium oxide
C) passing it directly through calcium oxide
D) passing it directly through calcium chloride
Show Answer
The correct answer is C .