Related Questions

__________ 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
K produces 100 parts twice as fast as G does. G produces 100 parts in 40 minutes. If each produces parts at a constant rate, how many parts will K produces in 6 minutes.
A 30
B 25
C 20
D 15
In what ratio should a 20% methyl alcohol solution be mixed with a 50% methyl alcohol solution so that the resultant solution has 40% methyl alcohol in it?
A 1 : 2
B 2 : 1
C 1 : 3
D 3 : 1
The alcohol and water in a mixture are in the ratio of 7 : 8 respectively. If 11 litre water is added to it, then the ratio of alcohol and water in the new mixture becomes 3 : 5. What is the total quantity (in litres) of the alcohol in the new mixture?
A 21
B 24
C 35
D 32
A mixture of alcohol and water contains 7% alcohol. How much mixture (in litres) is required to get 357 litres of alcohol?
A 6300
B 4200
C 4900
D 5100
Solution X is 10% percent alcohol by volume, and solution Y is 30 percent alcohol by volume. How many milliliters of solution Y must be added to 200 milliliters of solution X to create a solution that is 25 percent alcohol by volume?
A 600
B 800
C 300
D 250
E None of these
Polyesters are manufactured by the polycondensation reaction of
A Dibasic acid with dihydric alcohol
B A single monomer
C Carboxylic acid with ethylene
D Inorganic acid with ethylene glycol
__________ is produced using polycondensation reaction.
A Polythene
B Phenol formaldehyde
C Poly vinyl chloride
D None of these
Polycondensation reaction of polymerisation
A Does not produce linear polymers
B Produces only thermoplastic material
C Produces epoxy polymers
D Does not need any catalyst
The feed to fractionating column is changed from saturated vapour to saturated liquid. If the separation and reflux ratio remains unchanged, the number of ideal stages will
A Increase
B Decrease
C Remains same
D Depend on saturated boiling point; may increase or decrease

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