Question:
The structure of Buna-S polymer is
The structure of Buna-S polymer is
Show Hint
Buna-S is made from butadiene and styrene; therefore, its structure contains a phenyl group \((C_6H_5)\).
Updated On: May 7, 2026
- \(\left[-CH_2-CH=CH-CH_2-CH(C_6H_5)-CH_2-\right]_n\)
- \(\left[-CH_2-CH=CH-CH_2-CH(CN)-CH_2-\right]_n\)
- \(\left[-CH_2-C(Cl)=CH-CH_2-\right]_n\)
- \(\left[-NH-CO-NH-CH_2-\right]_n\)
Show Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Concept:
Buna-S is a copolymer of butadiene and styrene.
Step 1: Buna-S is also called styrene-butadiene rubber.
Step 2: The monomers are: \[ CH_2=CH-CH=CH_2 \] which is butadiene, and \[ C_6H_5CH=CH_2 \] which is styrene.
Step 3: Since styrene contains the phenyl group: \[ C_6H_5 \] the Buna-S polymer must contain \(C_6H_5\) as a side group.
Step 4: Therefore, the correct repeating unit is: \[ \left[-CH_2-CH=CH-CH_2-CH(C_6H_5)-CH_2-\right]_n \] Hence, \[ \boxed{\left[-CH_2-CH=CH-CH_2-CH(C_6H_5)-CH_2-\right]_n} \]
Step 1: Buna-S is also called styrene-butadiene rubber.
Step 2: The monomers are: \[ CH_2=CH-CH=CH_2 \] which is butadiene, and \[ C_6H_5CH=CH_2 \] which is styrene.
Step 3: Since styrene contains the phenyl group: \[ C_6H_5 \] the Buna-S polymer must contain \(C_6H_5\) as a side group.
Step 4: Therefore, the correct repeating unit is: \[ \left[-CH_2-CH=CH-CH_2-CH(C_6H_5)-CH_2-\right]_n \] Hence, \[ \boxed{\left[-CH_2-CH=CH-CH_2-CH(C_6H_5)-CH_2-\right]_n} \]
Was this answer helpful?
0
0
Top AP ECET Chemistry Questions
- Thermal decomposition of $HCOOH$ is a first order reaction and the rate constant at T(K) is $4.606 \times 10^{-3}\, s^{-1}$. The time required to decompose $90\%$ of initial quantity of $HCOOH$ at $T(K)$ in seconds is
- To which group and period does the element belong if the electronic configuration of an element in its $-2$ oxidation state is $1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6}$ ?
- A solution is prepared by dissolving $10 \,g$ of a non-volatile solute (molar mass, $'M^{\prime} g mol ^{-1}$ ) in $360\, g$ of water. What is the molar mass in $g\, mol ^{-1}$ of solute if the relative lowering of vapour pressure of solution is $5 \times 10^{-3}$ ?
- Reduction of nitrobenzene in the presence of $ \text{Zn/N}{{\text{H}}_{\text{4}}}\text{Cl} $ gives:
- Magnesium is burnt in air to form $A$ and $B$. When $B$ is hydrolysed, $C$ and $D$ are formed. $D$ is the reactant in the manufacture of nitric acid by Ostwald's process. What is $C$
View More Questions
Top AP ECET Polymers Questions
- The monomer involved in the formation of polystyrene is
- We can overcome the undesirable properties of natural rubber by heating natural rubber with
- During vulcanization of raw rubber, the chemical added to it is
- Which of the following is a natural polymer?
- The polymer used in making gaskets and non-stick coating utensils is
View More Questions
Top AP ECET Questions
- The sum of the four digit even numbers that can be formed with the digits 0,3,5,4 with out repetition is
- Thermal decomposition of $HCOOH$ is a first order reaction and the rate constant at T(K) is $4.606 \times 10^{-3}\, s^{-1}$. The time required to decompose $90\%$ of initial quantity of $HCOOH$ at $T(K)$ in seconds is
- Three rods of same dimensions have thermal conductivities 3 K, 2 K and K. They are arranged as shown below:What will be the temperature T of the junction?
- To which group and period does the element belong if the electronic configuration of an element in its $-2$ oxidation state is $1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6}$ ?
- A ball of mass 0.6 kg attached to a light inextensible string rotates in a vertical circle of radius 0.75 m such that it has a speed of $ 5\text{ }m{{s}^{-1}} $ when the string is horizontal. Tension in string when it h horizontal on other side is $ (g=10m{{s}^{-}}2) $
View More Questions