Ionic Mechanism

Q.

Explain the term copolymerisation and give two examples.

Q.

Match the catalysts to the correct processes:

Catalyst Process

(A) TiCl₃ (i) Wacker process

(B) PdCl₂ (ii) Ziegler - Natta polymerization

(C) CuCl₂ (iii) Contact process

(D) V₂O₅ (iv) Deacon's process

1. (A) - (iii), (B) - (ii), (C) - (iv), (D) - (i)

2. (A) - (ii), (B) - (i), (C) - (iv), (D) - (iii)

3. (A) - (ii), (B) - (iii), (C) - (iv), (D) - (i)

Q.

Cationic polymerisation is initiated by

1. BF₃

2. NaNH₂

3. Sncl₄

4. BuLi

Q.

Polymerization of glycol with dicarboxylic acids is

1. Telomerisation

2. Any of these

3. Addition polymerisation

4. Condensation polymerisation

Q.

The species which can best serve as an initiator for the cationic polymerization is

1. LiAIH₄

2. AICI₃

3. BuLi

4. HNO₃

Q. What is meant by polymorphism shown by chalcogens

Q.

How can you differentiate between addition and condensation polymerisation?

Q. Zeigler- Natta catalyst is:

1. $\left[Rh\right(PP{h}_3{)}_3]Cl$
2. $C{r}_2{O}_3+A{l}_2{O}_3$
3. Cold alkaline $KMn{O}_4$
4. $TiC{l}_4+(C_2{H}_5{)}_{3}Al$

Q. Dicarboxylic acids react with diols to form which type of co-polymer?

1. Random
2. Alternating
3. Block
4. Graft

Q.

The species which can best serve as an initiator for the cationic polymerization is

1. HNO₃

2. AICI₃

3. BuLi

4. LiAIH₄

Q. Which of the following is common cationic polymerization initiator?

1. $B{F}_3$
2. $AlC{l}_3$
3. $SnC{l}_4$
4. All

Q. Which of the following is an example of network polymer?

1. Bakelite
2. All
3. Polyethylene
4. PVC

Q. Which of the following substance is not a covalent polymer?

1. Silica
2. Diamond
3. Glucose
4. Silicon carbide

Q.

The Zieglar-Natta catalysts are

1. Stereospecific

2. Non-metallic complexes

3. Gaseous catalysts

4. Universal in all polymerisation reactions

Q.

How can you differentiate between addition and condensation polymerisation?

Q. Which is/are the correct statement(s) regarding the polymer kevlar?

1. It is an addition polymer.
2. It is a copolymer.
3. It has elastic property.
4. It is a polyamide.

Q. Which type of polymer based on structure is obtained when phenol reacts with form aldehyde?

Q.

The Zieglar-Natta catalysts are

1. Stereospecific
2. Non-metallic complexes
3. Gaseous catalysts
4. Universal in all polymerisation reactions