GATE CH Chemical Technology PYQs & Answers — Page 2

Questions 11–20 of 38. Imported answers require independent review unless marked reviewed.

Which one of the following options represents the major components of oleum?

Your answerChoose one option.

Sulfuric acid and nitric acid

Concentrated sulfuric acid and petrol jelly

Sulfuric acid and hydrochloric acid

Sulfuric acid and sulfur trioxide

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Nitrile rubber is manufactured via polymerization process. Which one of the following options is the CORRECT pair of monomers used in this process?

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Acrylonitrile and styrene

Acrylonitrile and butadiene

Butadiene and styrene

Butadiene and isoprene

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Match the products in Group 1 with the manufacturing processes in Group 2 listed in the table below.

Group 1	Group 2
P) Acetaldehyde	I) Sulfate process
Q) Sulfuric acid	II) Electric furnace process
R) Pulp	III) Wacker process
S) Phosphorus	IV) Contact process

Your answerChoose one option.

P-III, Q-IV, R-I, S-II

P-III, Q-I, R-IV, S-II

P-IV, Q-I, R-II, S-III

P-I, Q-IV, R-II, S-III

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Match the reactions in Group 1 with the catalysts in Group 2 listed in the table below.

Group 1	Group 2
P)	I) Mixed oxide of Mo and Fe
Q)	II)
R)	III)
S) Naphthalene Phthalic Anhydride	IV)

Your answerChoose one option.

P-III, Q-IV, R-II, S-I

P-III, Q-IV, R-I, S-II

P-IV, Q-II, R-I, S-III

P-IV, Q-III, R-I, S-II

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In soap manufacturing, the triglycerides present in oils and fats are hydrolyzed to mainly produce

Your answerChoose one option.

Fatty acids and glycerol

Glycerol only

Fatty acids only

Glycerol and paraffins

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The chemical formula of Glauber’s salt, used in the Kraft process, is

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Na₂CO₃.10H₂O

Na₂S₂O₄.2H₂O

Na₂HPO₄.2H₂O

Na₂SO₄.10H₂O

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Catalytic reform is commonly used in the petroleum industry to improve fuel quality. The undesirable reaction in the catalytic reforming of naphtha is

Your answerChoose one option.

Hydrocracking of paraffins

Dehydrogenation of naphthenes

Isomerization of naphthenes

Cyclization of paraffins

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Match the product in Group-1 with the manufacturing process in Group-2. The correct combination is

Group-1		Group-2
P	Nitric acid	I	Tona process
Q	Phosphoric acid	II	Twitchell process
R	Potassium chloride	III	Ostwald’s process
S	Stearic acid	IV	Haifa process

Your answerChoose one option.

P-III, Q-I, R-IV, S-II

P-IV, Q-I, R-II, S-III

P-III, Q-IV, R-I, S-II

P-I, Q-IV, R-II, S-III

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Match the common name of chemicals in Group – 1 with their chemical formula in Group – 2.

Group – 1		Group – 2
P	Gypsum	I	Ca(H₂PO₄)₂
Q	Dolomite	II	CaSO₄.2H₂O
R	Triple superphosphate	III	CaCO₃.MgCO₃

The correct combination is:

Your answerChoose one option.

P – III, Q – II, R – I

P – III, Q – I, R – II

P – II, Q – III, R – I

P – II, Q – I, R – III

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Match the reaction in Group – 1 with the reaction type in Group – 2.

Group – 1	Group – 2
P: Methylcyclohexane → Toluene + 3H	I: Dehydrocyclization
Q: Ethylcyclopentane → Methylcyclohexane	II: Cracking
R: n-Octane → Ethylbenzene + 4H	III: Dehydrogenation
S: n-Octane → n-Pentane + Propylene	IV: Isomerization

The correct combination is:

Your answerChoose one option.

P – II, Q – III, R – I, S – IV

P – II, Q – IV, R – I, S – II

P – II, Q – IV, R – II, S – I

P – I, Q – IV, R – III, S – II

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GATE CH Chemical Technology PYQs

Question 16

Question 18

Question 38

Question 39

Question 18

Question 19

Question 20

Question 43

Question 15

Question 33