Related Questions

Manufacture of phthalic anhydride uses __________ as a catalyst.
A Ni
B Cr
C V2O5
D Al2O3
Phthalic anhydride is produced by the oxidation of
A Naphthalene
B Benzene
C Toluene
D Aniline
Catalyst used in the oxidation of benzene to produce maleic anhydride is
A V2O5
B Pt
C Ni
D Cr
Molten phthalic anhydride is stored in a/an __________ vessel.
A Aluminium
B Nickel clad steel
C Lead lined steel
D Glass lined steel
__________ are produced by reacting polybasic acid (e.g. phthalic anhydride) with polyhydric alcohol (e.g., glycerol).
A Unsaturated polyester
B Alkyd resins
C Saturated polyester
D Amino resins
Phthalic anhydride is made by the
A Oxidation of naphthalene
B Oxidation of benzene
C Dehydrogenation of ethyl benzene
D None of these
Phthalic anhydride is used
A In making PVC
B As plasticisers
C In insecticides manufacture
D For making nylon-6
Alkyd resin e.g., glyptal resin formed by phthalic anhydride and glycerene is not used
A For surface coating of automobiles & air crafts
B For fibre making
C As plasticiser for PVC & nitrocellulose
D For film forming materials
Bacterial aerobic oxidation of polluted water in biological oxidation ponds is done to purify it. Presence of bacteria helps in
A Coagulation and flocculation of colloids
B Oxidation of carbonaceous matter to CO2
C Nitrification or oxidation of ammonia derived from breakdown of nitrogeneous organic matter to the nitrite and eventually to the nitrate
D All of the above
Maleic anhydride is produced by catalytic oxidation of
A Toluene
B Ethyl alcohol
C Naphthalene
D Benzene

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