Molecular weight of plastics ranges from ______________________?

Related Mcqs:

1. Sodium salt of higher molecular weight fatty acid is termed as the ______________________ soap?

   A. Hard
   B. Soft
   C. Metallic
   D. Lubricating

2. Plasticisers are added to synthetic plastics to____________________?

   A. Impart flexibility
   B. Improve workability during fabrication
   C. Develop new improved properties not present in the original resins
   D. All A, B. and C.

3. Molecular weights of polymers are in the range of__________________ ?

   A. 102 – 102
   B. 105 – 109
   C. 102 – 107
   D. 109 – 1011

4. ______________________ of quicklime produces slaked lime ?

   A. Hydration
   B. Dehydration
   C. Hydrogenation
   D. None of these

5. Sea water contains about ______________________ ppm of bromine ?

   A. 5
   B. 70
   C. 500
   D. 1700

6. Commercially ethylene is produced from naphtha by ______________________?

   A. Catalytic cracking
   B. Catalytic dehydrogenation
   C. Pyrolysis
   D. Hydrocracking

7. Catalyst used in the oxidation of benzene to produce Maleic anhydride is ______________________?

   A. V2O5
   B. Pt
   C. Ni
   D. Cr

8. Percentage of alcohol in beer may be around ______________________ percent?

   A. 2-8
   B. 18-23
   C. 27-32
   D. 1-4

9. Nylon-6 is manufactured from ______________________ ?

   A. Caprolactam
   B. Hexamethylene diamine and adipic acid
   C. Hexamethylene diamine and Maleic anhydride
   D. Hexamethylene diamine and Sebacic acid

10. Thermosetting materials ______________________?

    A. Are cross-linked molecules
    B. Soften on application of heat
    C. Are solvent soluble
    D. None of these