MCQOPTIONS
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MCQOPTIONS
This section includes 1331 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 601. |
Which of the following is an yellow pigment ? |
| A. | Titanium dioxide |
| B. | Ferrous sulphate |
| C. | Lead chromates |
| D. | Zinc sulphides |
| Answer» D. Zinc sulphides | |
| 602. |
Which of the following is a detergent ? |
| A. | Benzene hexachloride |
| B. | Alkyl benzene sulphonate |
| C. | Polytetraflouroethylene |
| D. | Cellulose nitrate |
| Answer» C. Polytetraflouroethylene | |
| 603. |
Which of the following is a co-product during the manufacture of caustic soda by electrolysis of brine ? |
| A. | Na₂CO₃ |
| B. | NaHCO₃ |
| C. | H₂ |
| D. | none of these |
| Answer» D. none of these | |
| 604. |
Which of the following is an endothermic reaction ? |
| A. | Absorption of SO₃ in 98% H₂SO₄. |
| B. | C + H₂O = CO + H₂. |
| C. | Thermal dissociation of iron pyrites. |
| D. | Both (b) and (c). |
| Answer» E. | |
| 605. |
Which is the most efficient absorbant for SO₃ out of the following ? |
| A. | 20% oleum |
| B. | 65% oleum |
| C. | 78% H₂SO₄ |
| D. | 98% H₂SO₄ |
| Answer» E. | |
| 606. |
In Kraft process of paper manufacture, white cooking liquor consists of caustic soda |
| A. | sodium sulphide & sodium carbonate. |
| B. | sodium sulphite & sodium carbonate. |
| C. | sodium sulphite & sodium sulphide. |
| D. | none of these. |
| Answer» B. sodium sulphite & sodium carbonate. | |
| 607. |
20% oleum means that in 100 kg oleum, there are 20 kg of |
| A. | SO₃ and 80 kg of H₂SO₄. |
| B. | H₂SO₄ and 80 kg of SO₃. |
| C. | SO₃ for each 100 kg of H₂SO₄. |
| D. | none of these. |
| Answer» B. H₂SO₄ and 80 kg of SO₃. | |
| 608. |
Which allotrope of sulphur is insoluble in carbon disulphide ? |
| A. | Rhombic sulphur |
| B. | Monoclinic sulphur |
| C. | Plastic sulphur |
| D. | Milk of sulphur |
| Answer» D. Milk of sulphur | |
| 609. |
Which of the following fuel gases contains maximum amount of carbon monoxide ? |
| A. | Coke oven gas |
| B. | Water gas |
| C. | Blast furnace gas |
| D. | L.D. converter gas |
| Answer» E. | |
| 610. |
The compressive strength of cement should not be less than about 110 Kg/cm² after three days & not less than 170 Kg/cm² after seven days. The fineness of an ordinary cement as determined by turbidimetric method should be about __________ cm²/gm. |
| A. | 800 |
| B. | 1600 |
| C. | 4000 |
| D. | 8500 |
| Answer» C. 4000 | |
| 611. |
Nitrile rubber is produced by the polymerisation of |
| A. | acrylonitrile and butadiene. |
| B. | acrylonitrile and styrene. |
| C. | isobutylene and isoprene. |
| D. | none of these. |
| Answer» B. acrylonitrile and styrene. | |
| 612. |
A mineral is termed as 'ore', if |
| A. | a metal can be economically extracted from it. |
| B. | it contains ≥ 40% metal. |
| C. | the metal present in it is costly. |
| D. | all (a), (b) and (c). |
| Answer» B. it contains ≥ 40% metal. | |
| 613. |
Which of the following is the second major component of cement ? |
| A. | Al₂O₃ |
| B. | SiO₂ |
| C. | CaO |
| D. | Fe₂O₃ |
| Answer» C. CaO | |
| 614. |
Permanent hardness of water can be removed by |
| A. | simply boiling. |
| B. | adding alum. |
| C. | passing it through cation & anion exchangers. |
| D. | all (a), (b) and (c). |
| Answer» D. all (a), (b) and (c). | |
| 615. |
Transportation of 35% oleum during winter suffers from the problem of freezing, which can be overcome by the addition of small quantity of |
| A. | nitric acid |
| B. | hydrochloric acid |
| C. | methyl alcohol |
| D. | formic acid |
| Answer» B. hydrochloric acid | |
| 616. |
Which of the following is a bleaching agent added in the detergents to facilitate removal of stains caused due to blood, tea etc? |
| A. | Sodium silicate |
| B. | Sodium borate |
| C. | Sodium tripolyphosphate (STPP) |
| D. | Caustic soda |
| Answer» C. Sodium tripolyphosphate (STPP) | |
| 617. |
Out of the following processes of paper pulp manufacture, the maximum corrosion problem in digestion & handling equipments is encountered in the __________ process. |
| A. | mechanical |
| B. | sulphate/kraft |
| C. | sulphite |
| D. | neutral sulphite semi-chemical |
| Answer» E. | |
| 618. |
Commercial scale production of hydrogen from iron-steam reaction represented by, 3Fe + 3H₂O = Fe₃O₄ + 4H₂, is not practised, as it is |
| A. | a slow reaction. |
| B. | a discontinuous reaction (requiring regeneration of iron by water gas intermittently). |
| C. | still in development stage (by employing fluidised bed technique). |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 619. |
Reaction of calcium carbide with water produces a gas, which is used |
| A. | as an illuminant. |
| B. | for metal cutting/welding. |
| C. | both (a) & (b). |
| D. | neither (a) nor (b). |
| Answer» D. neither (a) nor (b). | |
| 620. |
Dehydrogenation of ethyl benzene produces |
| A. | styrene |
| B. | naphthalene |
| C. | phenol |
| D. | benzoic acid |
| Answer» B. naphthalene | |
| 621. |
Which of the following paper does not require a filler during manufacture ? |
| A. | Bond paper |
| B. | Writing paper |
| C. | Blotting paper |
| D. | Coloured paper |
| Answer» D. Coloured paper | |
| 622. |
Heating of __________ to 120°C, produces plaster of paris. |
| A. | blue vitriol |
| B. | gypsum |
| C. | calcium silicate |
| D. | calcium sulphate |
| Answer» C. calcium silicate | |
| 623. |
Which of the following is not responsible for causing permanent hardness of water ? |
| A. | Ca(HCO₃)₂ |
| B. | CaCl₂ |
| C. | MgCl₂ |
| D. | none of these |
| Answer» B. CaCl₂ | |
| 624. |
Polymerisation product of C₂F₄ (carbon tetraflouride) is called P.T.F.E (poly chloro tetra flouro ethylene). It is also called |
| A. | polyurethane |
| B. | silicone |
| C. | teflon |
| D. | epoxy resin |
| Answer» D. epoxy resin | |
| 625. |
Which of the following is not produced commercially from sea water ? |
| A. | Magnesium & potassium compounds |
| B. | Common salt |
| C. | Bromine |
| D. | Iodine |
| Answer» E. | |
| 626. |
In the manufacture of sulphuric acid from elemental sulphur, the following sequence of major operations is followed : |
| A. | furnace → converter → absorber |
| B. | furnace → evaporator → absorber |
| C. | furnace → converter → evaporator |
| D. | converter → furnace → absorber |
| Answer» B. furnace → evaporator → absorber | |
| 627. |
Laboratory glass wares which reacts with hydroflouric acid, are made of the __________ glass. |
| A. | lead |
| B. | borosilicate |
| C. | soda lime |
| D. | alkali silicate |
| Answer» C. soda lime | |
| 628. |
Which of the following is used as a coagulant in water treatment ? |
| A. | Chloramine |
| B. | Chlorine |
| C. | Ferrous sulphate |
| D. | Hydrogen peroxide |
| Answer» D. Hydrogen peroxide | |
| 629. |
Acetone is produced by catalytic dehydrogenation of |
| A. | phenol |
| B. | naphthalene |
| C. | isopropanol |
| D. | ethyl benzene |
| Answer» D. ethyl benzene | |
| 630. |
Which of the following is a disacchride ? |
| A. | Sucrose |
| B. | Glucose |
| C. | Starch |
| D. | Maltose |
| Answer» B. Glucose | |
| 631. |
Which of the following is an additional step in the manufacture of paper from bagasse as compared to that from bamboo ? |
| A. | Depithing |
| B. | Digestion |
| C. | Bleaching |
| D. | None of these |
| Answer» B. Digestion | |
| 632. |
Which one of the following is not likely to be a constituent of vegetable oils ? |
| A. | Citric acid |
| B. | Oleic acid |
| C. | Stearic acid |
| D. | Glycerol |
| Answer» B. Oleic acid | |
| 633. |
Which of the following is an unsaturated fatty acid ? |
| A. | Lauric acid |
| B. | Palmitic acid |
| C. | Stearic acid |
| D. | Oleic acid |
| Answer» E. | |
| 634. |
Mercury cells for caustic soda manufacture, compared to diaphragm cells |
| A. | require lower initial investment. |
| B. | require more power. |
| C. | produce lower concentration NaOH. |
| D. | none of these. |
| Answer» E. | |
| 635. |
In an integrated steel plant, NH₃ present in coke oven gas is normally recovered as |
| A. | (NH₄)₂SO₄ |
| B. | NH₄Cl |
| C. | (NH₄)₂NO₃ |
| D. | liquid NH₃ |
| Answer» B. NH₄Cl | |
| 636. |
Which of the following impurities in feed water for high pressure boiler is the most detrimental ? |
| A. | Silica |
| B. | Dissolved oxygen |
| C. | Suspended salt |
| D. | Dissolved salt |
| Answer» B. Dissolved oxygen | |
| 637. |
Chemical formula of BHC, which is an insecticide is |
| A. | C₆H₆Cl₆ |
| B. | C₆Cl₆ |
| C. | C₆H₅Cl |
| D. | C₆H₄Cl₂ |
| Answer» C. C₆H₅Cl | |
| 638. |
Alum [Al₂(SO₄)₃] is used as a coagulant in water treatment to remove |
| A. | colour |
| B. | turbidity |
| C. | bacteria |
| D. | all (a), (b) and (c) |
| Answer» E. | |
| 639. |
Which of the following is not required in the manufacture of soda ash by Solvay process ? |
| A. | Ammonia |
| B. | Limestone |
| C. | Nitric acid |
| D. | None of these |
| Answer» D. None of these | |
| 640. |
Oils are partially hydrogenated (not fully) to manufacture vanaspati, because fully saturated solidified oils |
| A. | cause cholesterol build up and blood clotting. |
| B. | are prone to rancid oxidation. |
| C. | always contain some amount of nickel (as their complete removal is very difficult). |
| D. | have affinity to retain harmful sulphur compounds. |
| Answer» B. are prone to rancid oxidation. | |
| 641. |
Comparing sulphate process with sulphite process, we find that __________ in the later. |
| A. | both temperature & pressure in the former is less than that |
| B. | both temperature & pressure in the former is more than that |
| C. | temperature is more in the former whereas pressure is more |
| D. | pressure is more in the former whereas temperature is less |
| Answer» C. temperature is more in the former whereas pressure is more | |
| 642. |
In contact process, SO₃ is absorbed in 97% H₂SO₄ and not in water, because |
| A. | SO₃ gas is sparingly soluble in water. |
| B. | water forms an acid mist, which is difficult to absorb. |
| C. | the purity of acid is affected. |
| D. | scale formation in the absorber is to be avoided. |
| Answer» C. the purity of acid is affected. | |
| 643. |
Sudden temperature fluctuation does not affect pyrex glass, because of its |
| A. | low co-efficient of expansion. |
| B. | high co-efficient of expansion. |
| C. | high melting point. |
| D. | both (b) and (c). |
| Answer» B. high co-efficient of expansion. | |
| 644. |
With increase in temperature, the equilibrium constant at constant pressure (Kp) for oxidation of sulphur dioxide |
| A. | increases |
| B. | increases linearly |
| C. | decreases |
| D. | decreases linearly |
| Answer» D. decreases linearly | |
| 645. |
Deaeration of water in its treatment is necessary, as it |
| A. | minimises its turbidity. |
| B. | helps in controlling its taste and odour. |
| C. | minimises its corrosiveness. |
| D. | none of these. |
| Answer» D. none of these. | |
| 646. |
Which is a high grade pulp ? |
| A. | Rag pulp |
| B. | Mechanical pulp |
| C. | Sulphate pulp |
| D. | Sulphite pulp |
| Answer» D. Sulphite pulp | |
| 647. |
Dense soda ash used in the manufacture of glass, is chemically represented by |
| A. | Na₂CO₃ |
| B. | Na₂CO₃.10H₂O |
| C. | Na₂CO₃.H₂O |
| D. | Na₂HCO₃ |
| Answer» D. Na₂HCO₃ | |
| 648. |
In industrial nomenclature, alcohol means |
| A. | butyl alcohol |
| B. | propyl alcohol |
| C. | ethanol |
| D. | methyl alcohol |
| Answer» D. methyl alcohol | |
| 649. |
Which of the following processes is absent in glass manufacturing process ? |
| A. | Sintering |
| B. | Annealing |
| C. | Shaping or forming |
| D. | Melting |
| Answer» B. Annealing | |
| 650. |
Vegetable oils contain large quantity of glycerides of unsaturated acids. When the vegetable oils contain high amount of saturated fatty acids, it is termed as __________ oil. |
| A. | drying |
| B. | semi-drying |
| C. | non-drying |
| D. | none of these |
| Answer» D. none of these | |