

Intro to Org Chem
Presentation
•
Chemistry
•
10th Grade
•
Practice Problem
•
Hard
Standards-aligned
Leong Yew Sheng Nicholas
Used 8+ times
FREE Resource
6 Slides • 7 Questions
1
Intro to Org Chem
Test, Write, Apply

2
Multiple Choice
What does hydrocarbon consist of?
hydrogen atoms and carbon atoms
hydrogen ions and carbon ions
water molecules and carbon atoms
3
Multiple Select
Which statement accurately describes a homologous series?
(You may choose more than 1 answer.)
undergoes similar chemical reactions
different functional group
same general formula
same physical properties
4
Multiple Select
Select the true statements for the gradual change in physical properties of a homologous series as the number of carbon atoms increases
Flammability increases
Melting/Boiling points increases
Viscosity increases
Density increases
5
Gradual Change in Physical Properties
When number of carbon atoms increases -> bigger size of molecules
1. Flammability decreases (Harder to combust, smokier flame)
2. Melting/Boiling Points increases
3. Viscosity increases (harder for liquid to flow)
4. Increase in density (more atoms in each molecule)
6
Multiple Select
Comparing the structures of alkanes and alkene, how are they similar?
same general formula
identical naming prefix
(eth-, prop-, but-...)
contained carbon-carbon double bond
same functional group
they are hydrocarbons
7
Alkane & Alkene
They are hydrocarbons (contained hydrogen and carbon atoms).
They have the same naming system according to the number of carbon atoms.
8
Multiple Select
Comparing the structures of alkanes and alkene, how are they different?
different general formula
identical naming prefix
(eth-, prop-, but-...)
alkene contained carbon-carbon double bond while alkane does not have.
same functional group
they are hydrocarbons
9
Alkane Vs Alkene
1. Different General Formula: Alkane - CnH2n+2 VS Alkene - CnH2n
2. Different functional group: Alkene - carbon-carbon double bond
10
Petroleum
Mixtures of hydrocarbons
(mainly alkanes)
How do we separate the different fractions of petroleum?
11
Open Ended
What is a petroleum?
12
Multiple Choice
Since petroleum is a mixture of hydrocarbons of different boiling points, we can use ____________ to separate the fractions.
simple distillation
filtration
crystallisation
fractional distillation
13
Fraction Distillation
1. Heat in furnace to form vapours
2. Vapours pass through fractionating tower
3. Petroleum gas is collected at the top of the tower
4. The other vapours cool and condense at the same time at different levels of the tower
5. The one with lower boiling points are collected at the top while the one with higher boiling points are collected at the bottom
Intro to Org Chem
Test, Write, Apply

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