Which of the following statements concerning polymers is not true?

Options

A. Polymers are synthesised from monomers during condensation
B. Polymers are synthesised from monomers by addition of water
C. Polymers consist of atleast two types of monomers
D. b and c

Answer

To determine which statement concerning polymers is not true, let's analyze each statement step by step.

**Step 1: Understanding Polymers and Monomers**
- Polymers are large molecules made up of smaller units called monomers.
- Monomers are the building blocks of polymers.

**Hint:** Remember that polymers are formed from smaller units called monomers.

**Step 2: Evaluating the First Statement**
- The first statement claims that "polymers are synthesized from monomers during condensation."
- In condensation reactions, monomers join together to form polymers, and a water molecule is released in the process.
- This statement is true.

**Hint:** Condensation reactions involve the removal of water when forming polymers.

**Step 3: Evaluating the Second Statement**
- The second statement claims that "polymers are synthesized from monomers by the addition of water."
- This statement is misleading because while water can be involved in hydrolysis (the breakdown of polymers), it is not used to synthesize polymers. Instead, it is removed during condensation.
- Therefore, this statement is also true in a misleading context.

**Hint:** Think about the role of water in polymer synthesis versus breakdown.

**Step 4: Evaluating the Third Statement**
- The third statement claims that "polymers consist of at least two types of monomers."
- This statement is false because polymers can be made from a single type of monomer.
- For example, cellulose is a polymer made entirely from Beta-D-Glucose, which is a single type of monomer.

**Hint:** Consider examples of polymers that are made from only one type of monomer.

**Step 5: Conclusion**
- The statement that is not true is: "polymers consist of at least two types of monomers." This is false because there are homopolymers, which consist of only one type of monomer.

**Final Answer:** The statement that is not true is: "polymers consist of at least two types of monomers."