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What type of reaction describes the polymerisation of glucose into cellulose? (A) Addition (B) Hydrolysis (C) Substitution (D) Condensation - HSC - SSCE Chemistry - Question 5 - 2007 - Paper 1
Question 5
What type of reaction describes the polymerisation of glucose into cellulose? (A) Addition (B) Hydrolysis (C) Substitution (D) Condensation
Worked Solution & Example Answer:What type of reaction describes the polymerisation of glucose into cellulose? (A) Addition (B) Hydrolysis (C) Substitution (D) Condensation - HSC - SSCE Chemistry - Question 5 - 2007 - Paper 1
Step 1
What type of reaction describes the polymerisation of glucose into cellulose?
Answer
The polymerisation of glucose into cellulose is a type of reaction that involves the formation of larger molecules from smaller ones, specifically by the removal of water. This process is known as condensation.
In the condensation reaction, two glucose molecules combine, releasing a water molecule, and forming a glycosidic bond. This is essential in creating complex carbohydrates like cellulose, which are vital for the structure of plants.
Therefore, the correct answer is (D) Condensation.
Step 2
In a galvanic cell, what is the pathway of electron flow?
Answer
In a galvanic cell, electrons flow from the anode to the cathode through an external wire. The electrolyte in the cell facilitates ion movement, while the electrons provide the electrical current.
Thus, the pathway of electron flow can be summarized as:
- Direction: anode to cathode
- Medium: external wire