Below are the structures of a number of important molecules - VCE - SSCE Chemistry - Question 1 - 2011 - Paper 1
Question 1
Below are the structures of a number of important molecules.
A.
B.
C.
D.
E.
F.
G.
H.
In each of the following questions, circle the letter or letter... show full transcript
Worked Solution & Example Answer:Below are the structures of a number of important molecules - VCE - SSCE Chemistry - Question 1 - 2011 - Paper 1
Step 1
Which molecule is used in the production of acetylsalicylic acid?
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Answer
The molecule used in the production of acetylsalicylic acid is Structure H. This molecule, also known as aspirin, is synthesized from salicylic acid and acetic anhydride.
Step 2
Which molecule is the product of a condensation polymerisation reaction?
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Answer
The molecule that results from a condensation polymerisation reaction is Structure F. This structure indicates the formation of an ester via the reaction of an alcohol and a carboxylic acid, in which water is eliminated.
Step 3
Which two molecules are produced when a triglyceride containing no carbon-carbon double bonds undergoes hydrolysis?
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Answer
The two molecules produced from the hydrolysis of a triglyceride are Structure E (glycerol) and Structure D (fatty acids). During hydrolysis, the triglyceride reacts with water, forming glycerol and fatty acid molecules.
Step 4
Which molecule could be a major component in biodiesel?
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Answer
The major component in biodiesel is Structure F. Biodiesel is typically produced from the transesterification of triglycerides, which can yield biodiesel as an alkyl ester present in this structure.
Step 5
Which molecule is one of the components that react to form sucrose?
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Answer
The molecule that reacts to form sucrose is Structure B, which represents glucose. The reaction occurs between glucose and fructose, which is derived from Structure A, to form the disaccharide sucrose.
Step 6
0.001 mole of which molecule will react completely with 0.320 g of bromine?
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Answer
To determine the molecule that reacts completely with 0.320 g of bromine, we first calculate the moles of bromine. The molar mass of Br2 is approximately 159.8 g/mol:
Thus, a molecule containing two C=C double bonds will be needed to react with 0.002 mol Br2. Structure D (a diunsaturated fatty acid) is appropriate here.
