Chemical Technology GATE-2003

Q 1: Nylon 66’ is so named because

A) the average degree of polymerization of the polymer is 1966
B) the number of carbon atoms between two nitrogen atoms is 6
C) the number of nitrogen atoms between two carbon atoms is 6
D) the polymer was first synthesized in 1996

Show Answer

Q 2: The catalytic converter for conversion of SO₂ to SO₃ by contact process should have a feed with SO₂ content between

A) 2-5%
B) 7-10%
C) 12-15 %
D) 12-25 %

Show Answer

Q 3: The composition of fresh feed to the high-temperature high-pressure urea autoclave is

A) excess liquid ammonia and liquefied CO₂
B) excess liquid ammonia and compressed CO₂ gas
C) liquid ammonia and excess compressed CO₂
D) compressed NH₃ gas and excess compressed CO₂

Show Answer

Q 4: Identify the group in which all the polymers mentioned can be used to make fibers.

A) Butadiene copolymers, Polyamides, Urea aldehydes
B) Cellulose derivatives, Polyisoprene, Polyethylene
C) Cellulose derivatives, Polyamides, Polyurethanes
D) Polypropylenes, Polyvinylchloride, Silicones

Show Answer

Q 5: The preferred reacting system for the oxidation of o-xylene to phthalic anhydride is

A) jacketed liquid phase CSTR
B) jacketed steam-heated multi-tubular reactor
C) multi-tubular reactor with cooling
D) multistage-multi-tubular reactor with interstate cooling

Show Answer

Q 6: Match the items in Group I with the items in Group II.

Group -1	Group -2
P: Calcium ammonium nitrate	1: Fertilizer industry
Q: CaCl2 – NaCl liquor	2: Paper and pulp industry
	3: Soda ash industry

A) P – I, Q – 3 
B) P – 1, Q – 2 
C) P – 3, Q – 1
D) P – 2, Q – 3

Show Answer

Q 7: Match the items in Group I with the items in Group II.

Group -1	Group -2
P: Black liquor	1: Petroleum refining
Q: Activated silica alumina	2: Sugar factory
R: Press mud

A) P – 1, R – 2
B) P – 2, Q – 1
C) Q – 1, R – 2
D) Q -2, R – 1

Show Answer

Q 8: In a refinery, petroleum crude is fractionated into gas fractions, light ends, intermediate distillates, heavy distillates, residues, and by-products. The group of products including gas oil diesel oil and heavy oil belongs to the fraction.

A) Heavy distillates
B) Intermediate distillates
C) Light ends
D) Residues

Show Answer

Q 9: The order of preference for feedstock to a catalytic reformer is

A) catalytic naphtha – coking naphtha – virgin naphtha
B) coking naphtha – virgin naphtha – catalytic naphtha
C) virgin naphtha – catalytic naphtha – coking naphtha
D) virgin naphtha – coking naphtha – catalytic naphtha

Show Answer