Chemistry 2008 Jamb Examination
Chemistry 2008 Jamb Examination
Question 41
A red precipitate of copper (I) carbide is formed when ammonium solution of copper (I) chloride is introduced into
Copper (I) chloride in ammonium solution reacts with a terminal alkyne (\( -C \equiv CH \)) to form a red precipitate of copper (I) carbide. The correct option is \( CH_3CH_2 - C \equiv CH \).
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Question 42
Reduction of nitroalkanes, nitrites and amides is a route for the preparation of
Nitroalkanes, nitrites and amides are reduced to give amines.
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Question 43
Reduction of alkanones with \( LiAlH_4 \) produces
Alkanones (ketones) are reduced by \( LiAlH_4 \) to form secondary alkanols.
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Question 44
The product obtained when a mixture of benzene vapour and hydrogen are passed over nickel catalyst at 180ºC is
Hydrogenation of benzene with hydrogen in the presence of nickel catalyst produces cyclohexane.
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Question 45
Polyvinyl chloride is used in the production of
Polyvinyl chloride (PVC) is widely used in the production of pipes due to its durability and resistance to corrosion.
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Question 46
Detergents are manufactured with straight hydrocarbon chains so as to make them
Straight hydrocarbon chains in detergents allow easy bacterial breakdown, making them biodegradable.
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Question 47
Use the diagram to answer this question. The gas that can be used to demonstrate the experiment is
The fountain experiment uses hydrogen chloride gas, which is highly soluble in water, creating a partial vacuum that draws water up.
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Question 48
Use the diagram to answer this question. The colour of the fountain water is
When hydrogen chloride dissolves in water, an acidic solution is formed. With litmus indicator present, the fountain water turns blue litmus red.
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Question 49
The major product of the dehydration of the compound
      OH
      |
   CH3 – C – CH2 – CH3
      |
      CH3
Dehydration of a secondary alcohol gives the more substitutedÂ
CH₃ – C = CH – CH₃
|
CH₃
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