Chemical Technology GATE-2010

Q 1: In the manufacture of caustic soda from brine, which ONE of the following statements is TRUE?

A) The membrane cell CANNOT produce concentrated NaOH solution, and CANNOT tolerate calcium and magnesium ions in the feed brine
B) The membrane cell CANNOT produce concentrated NaOH solution, but CAN tolerate calcium and magnesium ions in the feed brine
C) The membrane cell CAN produce concentrated NaOH solution, but CANNOT tolerate calcium and magnesium ions in the feed brine
D) The membrane cell CAN produce concentrated NaOH solution, and CAN tolerate calcium and magnesium ions in the feed brine

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Q 2: For making superphosphate by acidulation of phosphate rock, the use of nitric acid is desirable, because

A) Nitric acid is less expensive than sulphuric acid
B) Availability of nitrogen enhances the value of the superphosphate as a fertilizer
C) The process produces non-hygroscopic superphosphate
D) The process produces superphosphate having higher phosphorus content than the sulphuric acid process

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Q 3: Match the processes in Group I with the products in Group II.

Group -1	Group -2
P: Claus process	I: Syngas
Q: Linde process	II: Oxygen
R: Lurgi process	III: Sulphur

A) P-I, Q-II, R-III
B) P-II, Q-I, R-III
C) P-III, Q-I, R-II
D) P-III, Q-II, R-I

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Q 4: Match each of the following techniques of polymerization in Group I, with the corresponding process characteristics in Group II.

Group -1	Group -2
P: Bulk	I: Polymer with very high molecular weight can be obtained
Q: Solution	II: Heat removal is crucial but very difficult
R. Suspension	III: Small amount of undesired low molecular weight polymer is formed
S: Emulsion	IV: Polymer concentration in the product stream is low.

A) P-I, Q-II, R-III, S-IV
B) P-II, Q-I, R-III, S-IV
C) P-I, Q-II, R-IV, S-III
D) P-III, Q-II, R-IV, S-I

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Q 5: Match each of the polymers in Group I, with the raw material in Group II from which they are made

Group -1	Group -2
P: Polyester	I: Ethylene glycol
Q: Polyamide	II: Adipic acid
R: Viscose rayon	III: Cellulose
S: Epoxy resin	IV: Bis-phenol

A) P-I, Q-II, R-III, S-IV
B) P-II, Q-I, R-III, S-IV
C) P-I, Q-II, R-IV, S-III
D) P-III, Q-II, R-IV, S-I

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