Related Questions

Addition polymerisation takes place either by a free radical mechanism or ionic machanism depending on the reagents used. Free radical polymerisation is catelyzed by __________ , which decompose to give free radicals.
A Organic peroxides
B Sulphuric acid
C Hydroflouric acid
D None of these
In step growth polymerisation, condensation occurs in a stepwise manner with or without the elimination of smaller molecules. An example of step growth polymerisation product is
A Terylene
B Polybutadiene
C PVC
D Polypropylene
In condensation polymerisation as compared to addition polymerisation
A The monomers are unsaturated compounds
B No co-product is lost
C The monomers contain two functional groups
D Generally only one monomer is involved
Chain growth polymerisation is a process, in which the monomers are added in a chain fashion, and it requires an initiator to produce the free radical. An example of chain growth polymerisation products is
A Nylon-66
B Teflon
C Polyester
D Bakelite
A garments factory employs 3 categories of workers K, M and N. The efficiency of the 3 categories of workers to do a specific task is in the ratio of 3 : 5 : 6 respectively and the factory employs 15 of category K, 12 of category M and 3 of category N. If the total wages paid to the entire group of 30 workers is Tk. 492 per hour, what will be the wages earned by a category N worker for an 8-hour day?
A Tk. 144
B Tk. 72
C Tk. 192
D Tk. 576
Q.(1-4): Answer the questions on the basis of the information given below. * F,G and H are insurance companies , Q,R,S and T are private detectives .Each detective works for at least one of the insurance companies. * Q always works for F and at least one of the other companies. Some of the time G employs only one of these detectives,' the rest of the time it employs exactly two of them. *F and H each employ exactly two of these detectives all the time. If R works for H only, and if S works for G and H only, T works for--
A F only
B G only
C H only
D both F and G
Polypropylene is preferred to polythene, because the former is
A Non-inflammable
B Harder
C Stronger
D Both B & C
Polypropylene compared to polythene is
A Harder
B Stronger
C Lighter
D All of the above
Polymerisation reactor used for the production of styrene butadiene rubber (SBR) is made of
A Cast iron
B Stainless steel or glass lined vessel
C Karbate
D Wrought iron
Polymerisation reactor used in the production of styrene butadiene rubber (SBR) is made of
A Stainless steel or glass lined steel
B Nickel clad steel
C High silicon cast iron
D Aluminium

Next steps