Polymers  MCQs

MCQs of Polymers

Showing 111 to 120 out of 168 Questions
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111.
Monomer of polymer Buna-S is _____ .
(a) only butadiene
(b) butadiene and nitrile
(c) only styrene
(d) butadiene and styrene
Answer:

Option (d)

112.
What is not related with SBR ?
(a) It is used in making footware.
(b) It has very good elasticity.
(c) At higher temperature its shape does not change.
(d) It is insoluble in organic solvents.
Answer:

Option (d)

113.
Which method is used to determine the molecular mass of polymer that does not depend on scattering of light ?
(a) CLS
(b) QELS
(c) HPLC
(d) DLS
Answer:

Option (c)

114.
Which method used to determine the molecular mass of polymer is suitable based on colligative properties ?
(a) Osmotic pressure measurement method.
(b) Depression of freezing point measurement method.
(c) Methods based on Rault's law.
(d) Elevation of boiling point measurement method.
Answer:

Option (a)

115.
Write a formula used to determine the number average molecular mass (Mn).
(a) Mn = Σ NiMiΣ Ni
(b) Mn = Σ NiMi2Σ Ni2
(c) Mn = Σ NiMi2Σ NiMi
(d) Mn = Σ NiMi2Σ Mi2
Answer:

Option (a)

116.
Which method is not suitable for the determination of weight average molecular mass (Mw) ?
(a) Ultra centrifuge
(b) Light scattering
(c) Chromatographic
(d) Depression of freezing point
Answer:

Option (d)

117.
For which polymer value of PDI = 1 ?
(a) Natural
(b) Semisynthetic
(c) Synthetic
(d) All of the above
Answer:

Option (a)

118.
From the polymers given below which is considered as monodispersed ?
(a) Starch
(b) Cellulose nitrate
(c) Nylon-6
(d) Both (A) and (B)
Answer:

Option (a)

119.
For which polymer Mw ≠ Mn  ?
(a) Natural rubber
(b) Cellulose
(c) Protien
(d) Terylene
Answer:

Option (d)

120.
Mention relation between Mw  and Mn  when PDI > 1.
(a) Mw < Mn 
(b) Mw > Mn 
(c) Mw = Mn 
(d) Mw ≤ Mn 
Answer:

Option (b)

Showing 111 to 120 out of 168 Questions
9 10 11 12 13 14