Natural rubber is a polymer of :
Natural rubber is 1,4-addition product of Isoprene. It involves formation of cis-isomer.
The catalyst used in the manufacture of polyethene by Zeigler method is:
Zeigler-natta polymerisation involves coordination polymerisation & give HDPE
Which of the following statements is not true?
Norethindrone is not a pheromone. It is a progestin hormone.
It is used for treating certain menstrual and uterine problems.
It works by altering the lining of uterus.
Which of the following statements is not correct?
Conceptual
Select the detergent that is used to prepare cosmetics.
CetyitrimethyI ammonium chloride is a cationic detergent. It is used to prepare cosmetics because it possesses germicidal properties.
Atiseptics are different from disinfectants as:
Conceptual
Which of the following has ester linkage?
Give the monomers of nylon-66.
Conceptual
The number average molecular mass and mass average molecular mass of a polymer are respectivey 30.000 and 40,000. The poly dispersity index of the polymer is:
It is a condensation product of hexamethylene diamine and adipic acid
In a polymer sample, 30% of molecules have a molecular mass of 20,000, 40% have 30,000 and th erest 60,000. What is the weight average molecular mass of the polymer?
Which one of the following is not a correct match?
Acrylonitrile (CH_2=CHCN) is the monomer unit of orlon polymer.
Chain transfer reagent is:
Conceptual
Which one of the following statements is not true?
Natural rubber is cis-configuration of 1,4-polyisoprene or
Which of the following statements is not correct?
Nylon 6,6 is made from two monomers, adipic acid and hexamethylene diamine.
Which of the following statements is false?
Nylon-6,6 is fibre
Which one of the following sets form the biodegradable polymer?
form biodegradable polymer
Which of the following compounds is aspirin?
Aspirin, also known as acetylsalicylic acid, is a medication used to reduce pain, fever, or inflammation. Specific inflammatory conditions which aspirin is used to treat include Kawasaki disease, pericarditis, and rheumatic fever. Aspirin given shortly after a heart attack decreases the risk of death.
Paracetamol is/are:
Conceptual
Which of the following is used as an antiseptic?
Dilute solution of phenol can act as antiseptic
Which of the following can disperse benzene in water?
Compound with hydrophobic tail & hydrophilic head
Choose the correct statement.
Conceptual
Detergents are known to pollute rivers and water ways. However, detergents can be made biodegradable and pollution free by taking:
Detergent molecules associated with branched hydrocarbon tail which is a source of pollution of water. However, detergents can be made biodegradable and pollution free by taking unbranched hydrocarbon chain because unbranched chains are more prone to attack by bacteria.
Which one of the following pairs is not correctly matched?
Teflon is polymer of tetraflouroethylene
The bakelite is made from phenol and formaldehye. The initial reaction between the two compounds is an example of:
Phenol acts as nucleophile & formaldehyde as an electrophile.
What is not true about polymers?
Polymers are macromolecules with high molecular weights.
Cellulose acetate is a :
Conceptual
Which of the following is an example of non-biodegradable detergent?
Branched alkyl sulphonates are non-biodegradable
Which one of the following substances is a good detergent in water?
Conceptual
Select the incorrect statement.
Conceptual
Aspartame is one of the good artifical sweeteners whose use is limited to cold food and soft drinks because:
Conceptual
What should be the feature of detergent molecule structure so as to be biodegradable?
Conceptual
Synthetic rubber is:
Synthetic rubber (neoprene) is a polymer of or chloroprene.
Example of addition polymer?
Buna-S
Which of the following is commonly called a “polyamide”?
Nylon-6,6 is polyamide having
is nylon-6,6
The polymer containing strong intermolecular forces, e.g., hydrogen bonding is:
Due to the presence of
Which one is classified as a condensation polymer?
It is a fact
Which of the following is an example of a thermosetting polymer?
Bakelite is thermosetting polymer.
Which of the following is correct?
Conceptual+
Which of the following is incorrect?
Conceptual
Use Code STAYHOME200 and get INR 200 additional OFF
|
Use Coupon Code |
![]() |
|
![]() |
|
![]() |
|
![]() |
|
|
|
|
|
|