AP EAMCET · Chemistry · Polymers
If the number average molecular weight and weight average molecular weight of a polymer are 40000 and 60000 respectively, the polydispersity index of the polymer will be
- A \(>1\)
- B \( < 1\)
- C 1
- D zero
Answer & Solution
Correct Answer
(A) \(>1\)
Step-by-step Solution
Detailed explanation
Polydispersity index, \(\mathrm{PDI}=\frac{\bar{M}_w}{\bar{M}_n}\) where, \(\bar{M}_w=\) weight average molecular weight \(\bar{M}_n=\) number average molecular weight \(\mathrm{PDI}=\frac{60000}{40000}=1.5\) ie, \(\quad>1\)
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Chemistry
- A solution is formed by the combination of two liquids such as dichloromethane and chloroform. The partial pressures of dichloromethane and.chloroform in solution are 285.5 and \(62.4 \mathrm{~mm} \mathrm{Hg}\) respectively. What is the total pressure of the solution?AP EAMCET 2023 Medium
- The molality of solution, when \(18 \mathrm{~g}\) of glucose is added to the \(18 \mathrm{~g}_{\text {of } \mathrm{H}_2 \mathrm{O} \text { is }}\)AP EAMCET 2023 Easy
- When \(25 \mathrm{~g}\) of a non-volatile solute is dissolved in \(100 \mathrm{~g}\) of water, the vapour pressure is lowered by \(2.25 \times 10^{-1} \mathrm{~mm}\). If the vapour pressure of water at \(20^{\circ} \mathrm{C}\) is \(17.5 \mathrm{~mm}\), what is the molecular weight of the solute?AP EAMCET 2008 Easy
- Find the uncertainty in the position of an electron which is moving with a velocity of \(2.99 \times 10^4 \mathrm{~cm} \mathrm{~s}^{-1}\), accurate up to \(0.0016 \%\). (Given, \(m_e=9.1 \times 10^{-28} \mathrm{~g}, h=6.626 \times 10^{-27}\) erg.s)AP EAMCET 2021 Medium
- Identify the correct statement (s) from the following
a) Protective power of a lyophilic sol is more if its gold number is more
b) In the coagulation of negative sols, the coagulating power of cations follow the order \(\mathrm{Na}^{+}>\mathrm{Ba}^{2+}>\mathrm{Al}^{3+}\)
c) Cloud is a solid in gas type of colloid
d) Physical adsorption is non-specific and multilayered at high pressure.AP EAMCET 2017 Easy - Consider the reaction given below
\(\mathrm{A}+2 \mathrm{~B} \longrightarrow 3 \mathrm{C}+2 \mathrm{D}\).
If rate of disapperance of B is \(x \times 10^{-2} \mathrm{~mol} \mathrm{~L}^{-1} \mathrm{~s}^{-1}\), the ratio of rate of reaction and rate of appearance of C isAP EAMCET 2025 Medium
More PYQs from AP EAMCET
- A straight rod of length 4 units slides such that its ends \(A\) and \(B\) always lie on the \(X\) and \(Y\)-axes respectively. Then, the locus of the centroid of \(\triangle O A B\) isAP EAMCET 2021 Medium
- If \(\frac{2+3 i \sin \theta}{1-2 i \sin \theta}\) is purely imaginary, then \(\cos ^2 \theta=\)AP EAMCET 2017 Easy
- \(\tan \left(2 \operatorname{Tan}^{-1}\left(\frac{1}{3}\right)+\operatorname{Tan}^{-1}\left(\frac{1}{7}\right)\right)=\)AP EAMCET 2025 Medium
- The gaseous mixture used for welding of metals isAP EAMCET 2022 Medium
- \(\cot 18^{\circ} \cdot \cot 36^{\circ}+1=\)AP EAMCET 2023 Easy
- A pair of perpendicular straight lines passes through the origin and also through the point of intersection of the curve \(x^2+y^2=4\) with \(x+y=a\). The set containing the value of ' \(a\) ' isAP EAMCET 2008 Hard