1
What do you call the the long molecule made of repeating units?
Polymer
Name this compound: CaCO3
Calcium carbonate
How many carbons and hydrogens are there in hexene?
6 carbons
12 hydrogens
What is the monomer used to make poly(ethene)
ethene
What is the color of flame when calcium ion is present in salt?
Brick red
What do you call the method of separation used to separate coloured dyes?
Chromatography
What functional group is present in alcohol?
OH
Between ethane and butane, which one releases more energy during combustion?
butane
How do you characterize the presence of a transition metal element?
coloured compound
Why is the base line drawn using pencil and not ink?
So it will not dissolve in the solvent.
How will you test for the presence of carbonate?
Use lime water test
What are the conditions needed for cracking?
High temperature (<450C) and presence of the catalyst (Zeolites: aluminum silicates)
What is the term used to describe compounds with same functional group?
homologous series
What anion always produces carbon dioxide when reacted with acid?
Carbonate
Describe the location in the fractional distillation column where you can find substances with largest molecules.
Lowest part of the column
Why are polymers ideal for making protective equipment?
Durable
lightweight
high chemical resistance
Write the symbol equation for the cracking of ethane.
C₂H₆ → C₂H₄ + H₂
What substance is heated before it enters the fractional distillation column.
Petroleum
Which of the two types of polymers produces water as a byproduct and is more biodegradable?
condensation
What is the general formula for alkane?
CnH2n+2