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Quiz

Lesson 3: Alkynes (Acetylene) and Cyclic Hydrocarbons — Picture questions (exam style)

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1.
Starting from 5.6 g of C₂H₂ in the sequence shown (yield of each step on its arrow, molar masses in brackets). Which option is correct?
Starting from 5.6 g of C₂H₂ in the sequence shown (yield of each step on its arrow, molar masses in brackets). Which option is correct?
mass of C₂H₂Br₄ = 52.2 g, overall yield = 70%
mass of C₂H₂Br₄ = 52.2 g, overall yield = 80%
mass of C₂H₂Br₄ = 74.5 g, overall yield = 80%
mass of C₂H₂Br₄ = 3.92 g, overall yield = 70%
2.
What is the product (?) of the reaction shown?
What is the product (?) of the reaction shown?
ethane
propene
bromoethene
propanone
3.
Starting from 20 g of C₂H₂ in the sequence shown (yield of each step on its arrow, molar masses in brackets). Which option is correct?
Starting from 20 g of C₂H₂ in the sequence shown (yield of each step on its arrow, molar masses in brackets). Which option is correct?
mass of C₆H₅CH₃ = 51 g, overall yield = 85%
mass of C₆H₅CH₃ = 14.4 g, overall yield = 72%
mass of C₆H₅CH₃ = 51 g, overall yield = 72%
mass of C₆H₅CH₃ = 70.8 g, overall yield = 85%
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