70.

71.

72.

73.

74.

75.

In distillation column sizing calculations by short cut methods, match the following :

P Underwoods equation
Fenske equation

Gilliland equation

52 ४० ‏م‎

Vapour velocity at flooding

(A) P-1, Q-3, R-4,8-6
(© 7.5, ९-3, ४-6, 8 -2

م

bo

൭ ൭൭. യാ

Number of real trays

Column diameter

Minimum Number of ideal trays
Actual number of ideal
Minimum reflux ratio

Tray efficiency

൫ 7-2, ९-5, ६-1, 8-8
(0) 7-5, ९-3, ६-4, 8-2

Stereo specific polymers are produced by
(^) Free radical

(C) Coordination polymerization

type of polymerization.
(B) Cationic
(D) Anionic

Styrene which is a monomer for the production of polystyrene is commercially produced by

the:

(A) Dehydration of ethyl alcohol followed by hydrogenation

(B) Reacting ethylene oxide with acetaldehyde

(C) Fermentation of starch

(D) Catalytic dehydrogenation of ethyl benzene

What is the role of potassium persulfate in polymerization reaction?

(A) Stabilizer
(C) Initiator

Bulk polymerization is not suited for
(A) Highly exothermic reaction
(C) Highly endothermic reaction

Nylon 66 is so named because :

(B) Cooling agent

(D) Terminating agent

type of reaction.
(B) Reversible reaction

(D) Irreversible reaction

(^) The average degree of polymerization of the polymer is 1966
(B) The number of carbon atoms between two nitrogen atoms are 6
(C) The number of nitrogen atoms between two carbon atoms are 6
(D) The polymer was first synthesized in 1966

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[P.T.0.]