Recent questions tagged polymers

(a) What does it mean for a molecule or a ligand to be "chiral"? What properties does chirality impart to a molecule? (b)What is the difference between a heterogeneous and a homogeneous catalyst? What are some of the advantages of homogeneous catalysts?

asked Dec 29, 2016 by sharmaaparna1

1 answer

famous sweet in hyderabad , Rishi bought some sweets . He requested the sales boy to put the sweets in a polythene bag.The sales boy refused to do so, instead he kept the sweet box in a paper bag. After reading the above passage answer the following questions. (i) Why did the sales boy refuse to put the sweet box in a polythene bag? (ii) As a student of chemistry, why would you advocate the use of paper bags instead of polythene bags?Which values are promoted through the use of paper bag? (iii) Suggest two activities to promote these values.

asked Nov 28, 2016 by meena.p

1 answer

Which of the following polymers soften on heating and harden on cooling? What are the polymers with this property collectively called? What are the structural similarities between such polymers?

asked Nov 28, 2016 by meena.p

1 answer

Explain elastomeric polymers and fibres

asked Nov 22, 2016 by meena.p

1 answer

(a) Give an example of a synthetic rubber and mention its main advantage. (b) Write the structures of the monomers of Dacron. (c) Arrange the following polymers in the increasing order of tensile strength. Nylon-6, Buna-S, Polythene.

asked Nov 16, 2016 by meena.p

1 answer

Give the preparation and uses of PVC

asked Nov 10, 2016 by meena.p

1 answer

a)What are polysaccharides ? Give one example b)Give the preparation and uses of PVC

asked Nov 8, 2016 by meena.p

1 answer

How do you explain the functionality of monomer?

asked Nov 4, 2016 by meena.p

1 answer

Low density polythene and high density polythene , both are polymers of ethene but there is marked difference in their properties . Explain

asked Nov 4, 2016 by meena.p

1 answer

(a) What is the role of benzoyl peroxide in polymerization of ethane ? (b) What are LDPE and HDPE ? How are they prepared?

asked Oct 31, 2016 by meena.p

1 answer

Write the information asked in the following polymers: (i) Bakelite -Materials used for preparation (ii) Nylon -6,6-Material required for preparation (iii) Synthetic rubber - monomeric repeating unit (iv) PVC - Monomeric repeating unit

asked Oct 24, 2016 by meena.p

1 answer

Write (a) Reaction involved in the preparation of a biodegradable polyester. (b) Monomer unit of synthetic rubber (neoprene) (c) One use of Nylon -6,6

asked Oct 20, 2016 by meena.p

1 answer

What is the function of sulphur in Vulcanization of rubber ?

asked Oct 17, 2016 by meena.p

1 answer

The oxidant which is used as an antiseptic is :

asked Dec 21, 2015 by meena.p

1 answer

Which of the following alkenes is most reactive towards cal ionic polymerization ?

asked Dec 21, 2015 by meena.p

1 answer

Tincture of iodine is :

asked Dec 21, 2015 by meena.p

1 answer

Which of the following is used an a " Morning after pill"?

asked Dec 21, 2015 by meena.p

1 answer

Bithional is an example of :

asked Dec 21, 2015 by meena.p

1 answer

The hybrid rocked propellant consists of :

asked Dec 21, 2015 by meena.p

1 answer

Which of the following is a bacteiostatic ?

asked Dec 21, 2015 by meena.p

1 answer

Which of the following compounds is used as a body deodorant ?

asked Dec 21, 2015 by meena.p

1 answer

Which of the following compounds is used as a body deodorant ?

asked Dec 21, 2015 by meena.p

1 answer

Phenacetin is used as an ?

asked Dec 21, 2015 by meena.p

1 answer

Which is not a polymer ?

asked Dec 21, 2015 by meena.p

1 answer

Which of the following is a cross linked polymer ?

asked Dec 21, 2015 by meena.p

1 answer

Which of the following rubbers is net a polydiene ?

asked Dec 21, 2015 by meena.p

1 answer

A drug that is antipyretic as well as analgesic is :

asked Dec 21, 2015 by meena.p

1 answer

Condensation product of caprolactum

asked Dec 21, 2015 by meena.p

1 answer

Which one of the following is not a bread spectrum antibiotic ?

asked Dec 21, 2015 by meena.p

1 answer

Buna-s is a polymer of :

asked Dec 21, 2015 by meena.p

1 answer

Which one of the following types of drugs reduces fever ?

asked Dec 21, 2015 by meena.p

1 answer

Which of the following is a polymide ?

asked Dec 21, 2015 by meena.p

1 answer

2-Acetoxy benzoic acid is used as an :

asked Dec 21, 2015 by meena.p

1 answer

In elastomer intermolecular forces are :

asked Dec 21, 2015 by meena.p

1 answer

A polymer containing nitrogen is :

asked Dec 21, 2015 by meena.p

1 answer

Paracetamol is an

asked Dec 21, 2015 by meena.p

1 answer

Nylon is not a

asked Dec 21, 2015 by meena.p

1 answer

Which of the following polymers has an ester linkage ?

asked Dec 21, 2015 by meena.p

1 answer

Which one of the following is employed as a tranquilizer drug?

asked Dec 21, 2015 by meena.p

1 answer

Which of the following is a mordant dye ?

asked Dec 21, 2015 by meena.p

1 answer

Which one of the following is a chain growth polymer ?

asked Dec 21, 2015 by meena.p

1 answer

Nylon threads are mode of :

asked Dec 21, 2015 by meena.p

1 answer

Which one of the following is net a tranquilizer ?

asked Dec 18, 2015 by meena.p

1 answer

Which of the following is not a b liquid propellant ?

asked Dec 18, 2015 by meena.p

1 answer

Which of the following is used to make paints and lacquers?

asked Dec 18, 2015 by meena.p

1 answer

Which of the following is used on as an antiseptic?

asked Dec 18, 2015 by meena.p

1 answer

Which of these is a hypnotic ?

asked Dec 18, 2015 by meena.p

1 answer

Which of the following is a plasticizes ?

asked Dec 18, 2015 by meena.p

1 answer

Red ink is prepared from :

asked Dec 18, 2015 by meena.p

1 answer

Cetyl trimethyl ammonium bromide is a popular ?

asked Dec 18, 2015 by meena.p

1 answer

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