22835.Dacron is obtained by the condensation polymerization of
dimethyl terephthalate and ethylene glycol
terephthalic acid and formaldehyde
phenol and phthalic acid
phenol and formaldehyde
22836.Catalyst used in dimerisation of acetylene to prepare chloroprene is
Cu2Cl2
Cu2Cl2 + NH4Cl
HgSO4 + H2SO4
Cu2Cl2 + NH4OH
22837.Among cellulose, poly(vinyl chloride), nylon and natural rubber, the polymer in which the intermolecular force of attraction is weakest is
Nylon
Cellulose
Poly(vinyl chloride)
Natural Rubber
22840.Soft drinks and baby feeding bottles are generally made up of
polyester
polyurethane
polyurea
polyamide
22842.Which polymer among the following polymers does NOT soften on heating?
Bakelite
Polythene
Polystyrene
PVC
22843.Themonomer(s) used to prepare polyvinyl polythene is
Vinyl chloride and ethene
1, 3–butadiene
Isoprene
1, 3–butadiene and acrylonitrile
22844.Match list I with list II and select the correct answer using the codes given below:
| List I (Polymers) | List II (Monomers) |
|---|---|
| 1. Buna–N | A. Phthalic acid and ethylene glycol |
| 2. Nylon–66 | B. Terephthalic acid and ethylene glycol |
| 3. Dacron | C. Hexamethylene diamine and adipic acid |
| 4. Glyptal plastic | D. Isobutylene and isoprene |
| E. Acrylonitrile and butadiene |
1 – B, 2 – A, 3 – D, 4 – E
1 – C, 2 – D, 3 – A, 4 – B
1 – D, 2 – C, 3 – B, 4 – A
1 – E, 2 – C, 3 – B, 4 – A
22846.The monomers of terylene are
phenol and formaldehyde
ethylene glycol and phthalic acid
adipic acid and hexamethylenediamine
ethylene glycol and terephthalic acid
22847.The number average molecular mass and mass average molecular mass of a polymer are respectively 30,000 and 40,000. The polydispersity index of the polymer is
<1
>1
1
–1
22848.The plastic household crockery is prepared, using
melamine and vinyl acetate
malonic acid and hexamethylenediamine
melamine and tetrafluoroethane
melamine and formaldehyde
22849.Which polymers occur naturally?
Starch and Nylon
Starch and Cellulose
Proteins and Nylon
Proteins and PVC
22850.The pyrimidine bases present in DNA are
cytosine and thymine
cytosine and guanine
cytosine and adenine
cytosine and uracil
22851.The source of Taq polymerase used in PCR is a
Thermophilic fungus
Mesophilic fungus
Thermophilic bacterium
Halophilic bacterium
22853.Which of the following is an addition polymer?
Nylon–6
Nylon–6,6
High density polythene
Dacron
22854.Three dimensional molecules with cross links are formed in the case of a _____.
Thermoplastic
Thermosetting plastic
Both A and B
None of these