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Lesson 2: Unsaturated Hydrocarbons – Alkenes (Olefins) — Picture questions (exam style)

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1.
Study the scheme. Which option is correct?
Study the scheme. Which option is correct?
(Y): ethane-1,2-diol, (X): ethene
(Y): ethane-1,2-diol, (X): diethyl ether
(Y): ethanol, (X): diethyl ether
(Y): ethanedioic acid, (X): ethyne
2.
Starting from 4.2 g of C₂H₄ in the sequence shown (yield of each step on its arrow, molar masses in brackets). Which option is correct?
Starting from 4.2 g of C₂H₄ in the sequence shown (yield of each step on its arrow, molar masses in brackets). Which option is correct?
mass of CH₃COOH = 9 g, overall yield = 66%
mass of CH₃COOH = 5.04 g, overall yield = 66%
mass of CH₃COOH = 5.04 g, overall yield = 56%
mass of CH₃COOH = 9 g, overall yield = 56%
3.
What is the major product (?) of the reaction shown? (apply Markovnikov’s rule where needed)
What is the major product (?) of the reaction shown? (apply Markovnikov’s rule where needed)
cyclohexane
2-bromo-2-methylpropane
ethane-1,2-diol
2-bromopropane
4.
Study the scheme. Which option is correct?
Study the scheme. Which option is correct?
(X): propanal, (Y): propanal
(X): propan-2-ol, (Y): propanone
(X): propan-1-ol, (Y): propanone
(X): propan-1-ol, (Y): propanoic acid
5.
Starting from 1 g of C₃H₆ in the sequence shown (yield of each step on its arrow, molar masses in brackets). Which option is correct?
Starting from 1 g of C₃H₆ in the sequence shown (yield of each step on its arrow, molar masses in brackets). Which option is correct?
mass of C₃H₆O = 1.38 g, overall yield = 66%
mass of C₃H₆O = 0.967 g, overall yield = 66%
mass of C₃H₆O = 0.773 g, overall yield = 56%
mass of C₃H₆O = 0.773 g, overall yield = 70%
6.
Which polymer is formed by addition polymerisation of the monomer shown?
Which polymer is formed by addition polymerisation of the monomer shown?
PMMA
PTFE (Teflon)
polypropene
PVC
7.
Starting from 4.2 g of C₂H₄ in the sequence shown (yield of each step on its arrow, molar masses in brackets). Which option is correct?
Starting from 4.2 g of C₂H₄ in the sequence shown (yield of each step on its arrow, molar masses in brackets). Which option is correct?
mass of C₂H₄(OH)₂ = 9.3 g, overall yield = 75%
mass of C₂H₄(OH)₂ = 3.15 g, overall yield = 85%
mass of C₂H₄(OH)₂ = 6.97 g, overall yield = 85%
mass of C₂H₄(OH)₂ = 6.97 g, overall yield = 75%
8.
What is the major product (?) of the reaction shown? (apply Markovnikov’s rule where needed)
What is the major product (?) of the reaction shown? (apply Markovnikov’s rule where needed)
2-methylpropan-2-ol
1,2-dibromocyclohexane
2-chloro-2-methylbutane
bromoethane
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