Petrochemicals

1994-4-f-chtech-1mark

1994-4-f-chtech

Match the reactions with names.

I. \(\ce {CO + H2O \rightleftharpoons CO2 + H2}\)

Answer 1

II. \(\ce {CH4 + H2O \rightleftharpoons CO + 3H2}\)

Answer 2

1988-9-b-iii-chtech-1mark

1988-9-b-iii-chtech

Epoxy resins come under the category of:

thermoplastic
thermosetting
oil soluble or oil modified
protein substances

1994-1-g-chtech-1mark

1994-1-g-chtech

Phthalic anhydride is produced by the oxidation of

Naphthalene
Benzene
Toluene
Aniline

2000-1-23-chtech-1mark

2000-1-23-chtech

Commercially, ethylene is produced from naphtha by

catalytic cracking
catalytic dehydrogenation
pyrolysis
hydrocracking

2001-1-24-chtech-1mark

2001-1-24-chtech

Styrene is produced from ethylbenzene by the process of

Dehydrogenation
Oxidation
Alkylation
Dehydration

2002-1-19-chtech-1mark

2002-1-19-chtech

The commonly used solvent in supercritical extraction is

Methyl-ethyl-ketone
Water
Carbon tetrachloride
Carbon dioxide

2003-86-chtech-2mark

2003-86-chtech

The preferred reacting system for oxidation of o-xylene to phthalic anhydride is

jacketed liquid phase CSTR
multitubular reactor with cooling
jacketed steam heated multitubular reactor
multistage multitubular reactor with interstage cooling

2005-24-chtech-1mark

2005-24-chtech

The chief raw material for the commercial production of methanol is

Synthesis gas
Formaldehyde
Acetic acid
Ethanol

2006-18-chtech-1mark

2006-18-chtech

The oxo reaction is used for converting

alcohol to aldehyde
paraffin to olefin
olefin to aldehyde
aldehyde to alcohol

2007-70-chtech-2mark

2007-70-chtech

Match the Petrochemical derivative in Group 1 with the raw materials in Group 2.

Group 1	Group 2
P. acrylonitrile	(1) methane
Q. ammonia	(2) ethane
R. dodecene	(3) ethylene
	(4) propylene

P - 1, Q - 2, R - 1
P - 2, Q - 1, R - 2
P - 3, Q - 4, R - 3
P - 4, Q - 1, R - 4

2009-49-chtech-2mark

2009-49-chtech

Match the product in Group I to the raw material in Group II.

Group 1	Group 2
P. Ethylene	1. Natural gas
Q. Methanol	2. Synthesis gas
R. Phthalic anhydride	3. Naphtha
	4. Naphthalene

P - 1, Q - 2, R - 3
P - 2, Q - 1, R - 4
P - 3, Q - 1, R - 4
P - 3, Q - 2, R - 4

2009-50-chtech-2mark

2009-50-chtech

Match the unit process in Group I with the industry in Group II.

Group 1	Group 2
P. Steam cracking	1. Petroleum refining
Q. Hydrocracking	2. Petrochemicals
R. Condensation	3. Polymers
	4. Soaps and Detergents

P - 1, Q - 2, R - 3
P - 2, Q - 3, R - 3
P - 1, Q - 2, R - 4
P - 2, Q - 1, R - 3

2011-47-chtech-2mark

2011-47-chtech

Match the reactions in Group I with the products in Group II.

Group I	Group II
P. Ammoxidation	I. Aniline from benzene
Q. Nitration	II. Benzoic acid from toluene
R. Dehydrogenation	III. Acrylonitrile from propylene
S. Oxidation	IV. Styrene from ethylbenzene

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

2013-42-chtech-2mark

2013-42-chtech

Match the reactant-product combination in Group 1 with the unit process in Group 2.

Group 1	Group 2
(P) propylene - butanol	(1) Pyrolysis
(Q) cumene - phenol	(2) Dehydrogenation
(R) butane - butadiene	(3) Hydroformylation
(S) ethylene dichloride - vinyl chloride	(4) Peroxidation

P-3, Q-2, R-4, S-1
P-2, Q-4, R-3, S-1
P-1, Q-3, R-2, S-4
P-3, Q-4, R-2, S-1

2014-55-chtech-2mark

2014-55-chtech

Match the raw materials of Groups 1 and 2 with the final products of Group 3.

Group 1	Group 2	Group 3
P₁: Ethylene	Q₁: Ammonia	R₁: Synthetic fibre
P₂: Propylene	Q₂: 1-Butene	R₂: Nylon 66
P₃: Adipic acid	Q₃: Ethylene glycol	R₃: LLDPE
P₄: Terephthalic acid	Q₄: Hexamethylene diamine	R₄: Acrylonitrile

P₁ + Q₂ \(\rightarrow \) R₃; P₂ + Q₁ \(\rightarrow \) R₄; P₃ + Q4 \(\rightarrow \) R₂; P₄ + Q₃ \(\rightarrow \) R₁
P₁ + Q₁ \(\rightarrow \) R₃; P₂ + Q₃ \(\rightarrow \) R₁; P₃ + Q₄ \(\rightarrow \) R₄; P4 + Q₂ \(\rightarrow \) R₂
P₁ + Q₂ \(\rightarrow \) R₂; P₂ + Q₃ \(\rightarrow \) R₁; P₃ + Q₄ \(\rightarrow \) R₃; P₄ + Q₁ \(\rightarrow \) R₄
P₁ + Q₁ \(\rightarrow \) R₄; P₂ + Q₂ \(\rightarrow \) R₃; P₃ + Q₄ \(\rightarrow \) R₂; P₄ + Q₃ \(\rightarrow \) R₁

2015-55-chtech-2mark

2015-55-chtech

Select the WRONG statement regarding water gas shift converters from the list below.

Inter-stage cooling is provided between the two stages of shift converters
Usually high temperature shift (HTS) reactor has a iron-based catalyst and low temperature shift (LTS) reactor has a copper-based catalyst
HTS reactor is followed by LTS reactor
LTS reactor is followed by HTS reactor

2000-18-a-chtech-2pt5mark-Match-ToWork

2000-18-a-chtech

Each of the products mentioned in the left-hand column requires one or more of the reactants mentioned in the right-hand column. Match the products with the appropriate reactant(s).

Phthalic anhydride

Answer 1

Phthalic anhydride

Answer 2

Cumene

Answer 3

Cumene

Answer 4

1989-20-iv-chtech-4mark

1989-20-iv-chtech

Write the chemical reactions (with conditions) involved in the processes for the manufacture of phenol from (a) Cumene, and (b) Toluene.

Answer

1991-1-ii-a-chtech-2mark

1991-1-ii-a-chtech

Pure terephthalic acid is manufactured by the oxidation of ------------------------ and is used as a raw material for the manufacture of ------------------------

Answer

1991-11-chtech-12mark

1991-11-chtech

Write down the main overall reaction equation for the manufacture of the following chemicals:

Soda Ash
Super phosphate from phosphate rock
Urea
High-octane petrol from naphtha
Vinyl acetate from ethylene
Acrylonitrile from propylene

Answer

1992-1-a-chtech-2mark

1992-1-a-chtech

The steps involved in the manufacture of phenol by chlorobenzene-caustic process, are chlorination of benzene, ------------------------ and ------------------------ . The process is competitive when low cost chlorine is available. This means that the process must be coupled to a ------------------------ plant.

Answer

1999-22-chtech-5mark

1999-22-chtech

Write the overall chemical reaction (stoichiometrically balanced) for the manufacture of each of the following chemicals

vinyl acetate from ethylene
urea from ammonia
styrene from ethyl benzene
caustic soda from brine
triple superphosphate from phosphate rock

Answer

2001-21-chtech-5mark

2001-21-chtech

Using appropriate structural formulae, write the equations representing the following reactions in the stoichimetrically balanced form.

Dehydrogenation of isopropanol to acetone
Hydroformylation of propylene to butyraldehyde
Nitration of toluene to o-nitrotoluene
Oxidation of cumene to cumene hydroperoxide using oxygen
Isomerisation of n-butane to isobutane

Answer

Chemical Technology - GATE Questions