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Q.1
Which of the following is a bleaching agent added in the detergents to facilitate removal of stains caused due to blood, tea etc?
Sodium silicate
Sodium borate
Sodium tripolyphosphate (STPP)
Caustic soda
Q.2
Rotary kiln is not involved in the production of
Cement
Lime from limestone
Slaked lime from quick lime
None of these
Q.3
Which of the following contains least amount of N₂?
Coke oven gas
Blast furnace gas
Producer gas
Water gas (blue gas)
Q.4
Which of the following paper does not require a filler during manufacture?
Bond paper
Writing paper
Blotting paper
Coloured paper
Q.5
Fish contains about __________ percent oil.
5
10
20
35
Q.6
Pick out the wrong statement.
Conversion of SO₂ to SO₃ in Monsanto-4 pass converter is about 98%
The chemical formula of oleum is H₂S₂O₇, which is formed by saturating sulphuric acid with sulphur trioxide
Vitriol oil is nothing but technical sulphuric acid
Decomposition of sulphuric acid on heating does not start before its boiling
Q.7
Electric bulbs are made of __________ glass.
Jena
Flint
Crookes
Pyrex
Q.8
Hydrazine (N₂H₄) is used mainly as a/an
Explosive
Rocket fuel
Detergents additive
None of these
Q.9
Common salt is generally not produced commonly by __________ method from brine.
Freeze drying
Electrolytic
Solar evaporation
Vacuum evaporation
Q.10
Sugar content in sugarcane on cane basis is about __________ percent by weight.
1 to 5
5 to 10
15 to 20
20 to 30
Q.11
Phenolic antiseptics are added in the __________ soap.
Shaving
Medicated
Metallic
Transparent
Q.12
__________ is produced using molasses as the starting raw material.
Methyl alcohol
Ethyl alcohol
Benzol
Dimethyl ether
Q.13
Pick out the wrong statement.
Wine, rum & Vodka are prepared by the formulation of fruit juice, sugar beet & rye respectively
Protein catalysts are called enzymes
The rate of chemical reaction is independent of the concentration of reactants at high concentration of enzymes
Total sugar content in molasses is about 10%
Q.14
The basic difference between vegetable oils and fats is in their
Density
Chemical properties
Physical state
Composition
Q.15
Polythene is a/an __________ polymerisation product.
Addition
Condensation
Thermosetting
None of these
Q.16
Pick out the wrong statement.
Chamber process of sulphuric acid manufacture produces pure acid of concentration < 80%
Contact process of sulphuric acid manufacture produces pure acid of concentration ≥ 98%
75% oleum can be produced by distillation of 20% oleum
Contact process of sulphuric acid manufacture uses nickel as the catalyst
Q.17
The catalyst used in the production of elemental sulphur from H₂S (by oxidation-reduction) is
Alumina
Silica gel
Platinum
Nickel
Q.18
In contact process, SO₃ is absorbed in 97% H₂SO₄ and not in water, because
SO₃ gas is sparingly soluble in water
Water forms an acid mist, which is difficult to absorb
The purity of acid is affected
Scale formation in the absorber is to be avoided
Q.19
Metallic soap is __________ salt of fatty acids.
Sodium
Potassium
Both sodium & potassium
Aluminium or calcium
Q.20
__________ is a polysacchride.
Maltose
Starch
Sucrose
Glucose
Q.21
Pencillin is made employing __________ fermentation process.
Continuous
Aerobic batch
Anaerobic batch
None of these
Q.22
For the hydrogenation of oils (i) __________ is commonly used as catalyst and (ii) __________ is a catalyst poison.
(i) platinum (ii) sulphur
(i) palladium (ii) oxygen
(i) nickel (ii) sulphur
(i) nickel (ii) oxygen
Q.23
Catalyst used in the manufacture of sulphuric acid by chamber & contact processes are respectively
V₂O₅ & Cr₂O₃
Oxides of nitrogen & Cr₂O₃
V₂O₅ on a porous carrier & oxides of nitrogen
Oxides of nitrogen & V₂O₅ on a porous carrier
Q.24
Favourable conditions for the liquefaction of gases in general are
High pressure & low temperature
Low pressure & high temperature
High pressure & high temperature
Low pressure & low temperature
Q.25
Polycaprolactum is commercially known as
Nylon-6
Nylon-66
Dacron
Rayon
Q.26
Wood charcoal is used for decolouration of sugar, because it __________ the coloured materials.
Adsorbs
Oxidises
Reduces
Converts
Q.27
Production of one ton of dry paper pulp requires about __________ tons of bamboo or wood.
1
2.5
5
10
Q.28
Consider the production of ammonia from methene and air as raw materials. The catalyst used are:
(i) __________ for steam reforming of methane and
(ii) __________ for ammonia synthesis.
(i) - Ni/Al2O₃; (ii) - Cu - ZnO/Al2O₃
(i) - Fe/Al2O₃; (ii) - Cu - ZnO/Al2O₃
(i) - Ni/Al2O₃; (ii) - Fe/Al2O₃
(i) - Fe/Al2O₃; (ii) - Ni/Al2O₃
Q.29
99.5% purity oxygen is used in
Cutting and welding by oxy-acetylene flame
Hospitals for medicinal purposes
Gas masks and artificial breathing apparatus
All of the above
Q.30
Baking soda is chemically represented by
Na₂CO₃
NaHCO₃
Na₂CO₃.H₂O
Na₂CO₃.10H₂O
Q.31
__________ is an ore of lead.
Quartz
Galena
Siderite
Chalcopyrite
Q.32
20% oleum means that in 100 kg oleum, there are 20 kg of
SO₃ and 80kg of H₂SO₄
H₂SO₄ and 80kg of SO₃
SO₃ for each 100 kg of H₂SO₄
None of these
Q.33
More than 100 percent of __________ is present in oleum.
SO₃
H₂SO₄
H₂SO₃
SO₂
Q.34
Fire clay is __________ refractory material.
A basic
An acidic
A neutral
Not a
Q.35
At a given temperature, the equilibrium yield of SO₃ obtained from the oxidation of SO₂ is proportional to (where, P = pressure of the system )
P
√P
P²
1/P
Q.36
Pick out the wrong statement.
Eosin requirement in tallow soap is about 40-50% which fastens the lather formation, softens the hard soaps and increases its cleansing action
Soap powder is prepared by mixing soap with hydrated sodium carbonate
Detergents differ from soaps in their action in hard water
Tarnish inhibitor (e.g., benzotriazole) is added in soap to facilitate the removal of stains due to tea, blood etc
Q.37
Cumene (isopropyl benzene) is made by
Oxidation of napthalene
Propylene alkylation of benzene
Polymerisation of a mixture of benzene & propylene
None of these
Q.38
__________ is a thermosetting plastic.
Polythene
Epoxy polymer
P.V.C.
Polystyrene
Q.39
Commercial production of Vanaspati is done by __________ of edible vegetable oils.
Hydrogenation
Oxidation
Hydrolysis
Hydrocracking
Q.40
Washing soda is chemically represented by
Na₂CO₃
Na₂CO₃.H₂O
Na₂CO₃.10H₂O
NaHCO₃
Q.41
10% oleum comprises of 10% free
SO₂
H₂SO₃
SO₃
H₂SO₄
Q.42
Calgon used in water treatment is chemically
Sodium phosphate
Sodium hexametaphosphate
Calcium phosphate
Tricresyl phosphate
Q.43
The main use of activated carbon in water treatment is to control
Bacterial growth
Taste and odour
Turbidity
None of these
Q.44
Phenol formaldehyde resin is used as an adhesive in making
Laminates
Card boxes
Furniture
Books
Q.45
Solvent used for extraction of oil is
Hexane
Methyl ethyl ketone
Furfurol
None of these
Q.46
Pick out the wrong statement.
Catalytic hydrogenation of carbon monoxide produces methyl alcohol
In nylon-6, the number 6 represents the total number of carbon atoms in the ring
Raw materials for DDT manufacture are benzene and chlorine
Ethanolamines are produced by using ammonia and ethylene oxide as raw material
Q.47
Refractory bricks having high thermal conductivity is desirable, when it is to be used in the
L.D. converter
Blast furnace
Rotary kiln
Recuperator
Q.48
Poly Vinyl Chloride (P.V.C.) is a __________ material.
Thermosetting
Thermoplastic
Fibrous
Chemically active
Q.49
Commercial production of soda ash by Solvay process requires limestone, __________ as raw materials.
Coke and sand
Brine and coal
Coke and caustic soda
None of these
Q.50
The gasification reaction represented by, C + H₂O = CO + H₂, is a/an __________ reaction.
Exothermic
Endothermic
Catalytic
Autocatalytic
0 h : 0 m : 1 s
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