What is the primary outcome when hydrogen is added over palladium to an alkyne?

Hydrogenation and Alkynes Concepts

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Chemistry
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11th - 12th Grade
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Hard

Emma Peterson
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Formation of a Z alkene
Formation of an alkane
Formation of an E alkene
Formation of an alkene
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which catalyst is used to stop hydrogenation at the alkene stage, specifically forming Z alkenes?
Sodium catalyst
Lithium catalyst
Lindlar catalyst
Palladium catalyst
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What type of alkene is produced when using a Lindlar catalyst?
E alkene
Z alkene
Cis alkene
Trans alkene
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which metals are used to produce E alkenes from alkynes?
Copper and zinc
Iron and nickel
Lithium and sodium
Magnesium and calcium
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the role of alkali metals in the hydrogenation of alkynes?
To fully hydrogenate to alkanes
To stop at the alkene stage and form E alkenes
To form Z alkenes
To prevent any hydrogenation
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which method results in the complete conversion of an alkyne to an alkane?
Using lithium and ethyl amine
Using hydrogen over palladium
Using sodium and ammonia
Using Lindlar catalyst
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the IUPAC name of a 5-carbon alkyne used in the example?
2-Pentyne
1-Pentyne
Pentene
Pentane
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