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.
| 901. |
Glycerine is recovered from lye by |
| A. | Evaporation followed by vacuum distillation |
| B. | Liquid extraction technique |
| C. | Extractive distillation technique |
| D. | None of these |
| Answer» B. Liquid extraction technique | |
| 902. |
Sulphuric acid solution having a specific gravity of 1.20 at room temperature is used mainly for the |
| A. | Fertiliser manufacture |
| B. | Car battery solution |
| C. | Synthesis of oleum |
| D. | Water treatment |
| Answer» C. Synthesis of oleum | |
| 903. |
Cation exchanger is regenerated usually with |
| A. | NaOH |
| B. | H₂SO₄ |
| C. | Hydrazine |
| D. | Alum solution |
| Answer» C. Hydrazine | |
| 904. |
Anion exchanger is regenerated usually with |
| A. | NaOH |
| B. | H₂SO₄ |
| C. | Hydrazine |
| D. | Alum solution |
| Answer» B. H₂SO₄ | |
| 905. |
Epoxy resin |
| A. | Is a good adhesive |
| B. | Is an elastomer |
| C. | Cannot be used for surface coatings |
| D. | Is a polyester |
| Answer» B. Is an elastomer | |
| 906. |
Neoprene is chemically known as |
| A. | Polybutadiene |
| B. | Styrene butadiene rubber (SBR) |
| C. | Polyurathane |
| D. | Polychloroprene |
| Answer» E. | |
| 907. |
Enzymes are |
| A. | Proteins with high molecular weight (around 10, 000) |
| B. | Derived from living organisms |
| C. | Catalyst for temperature sensitive reactions |
| D. | All of the above |
| Answer» E. | |
| 908. |
Exothermic neutralisation reaction between caustic soda and dodecylbenzene sulphonic acid produces sodium dodecylbenzene sulphate, which is a/an |
| A. | Explosive |
| B. | Soap |
| C. | Detergent |
| D. | Analgesic drug |
| Answer» D. Analgesic drug | |
| 909. |
Pick out the wrong statement pertaining to nitric acid. |
| A. | About 90% of nitric acid is manufactured by Ostwald |
| B. | It is a strong mono basic acid which reacts with almost all the metals except noble metals |
| C. | Yellow color of impure nitric acid is because of dissolved oxides of nitrogen (mainly NO₂) |
| D. | Arc process of nitric acid manufacture is economical as compared to Ostwald |
| Answer» E. | |
| 910. |
A bio-catalyst produced by living cells which acts independent of the cell is called a/an |
| A. | Substrate |
| B. | Enzyme |
| C. | Nutrient |
| D. | None of these |
| Answer» C. Nutrient | |
| 911. |
Coloured glass is obtained by mixing of colored salts. Addition of __________ oxide is done to impart greenish blue color to the glass. |
| A. | Chromium |
| B. | Arsenic |
| C. | Copper |
| D. | Mangnese |
| Answer» D. Mangnese | |
| 912. |
Isopropyl benzene produced by alkylation of benzene with propylene is known as |
| A. | Neoprene |
| B. | Cumene |
| C. | Gelatin |
| D. | Mercaptans |
| Answer» C. Gelatin | |
| 913. |
The most widely used coagulant for removing suspended impurities from water is |
| A. | Bleaching powder |
| B. | Chlorine |
| C. | Calcium sulphate |
| D. | Alum |
| Answer» E. | |
| 914. |
Enamels |
| A. | Give good glossy finish |
| B. | Are same as varnish |
| C. | Are prepared from non-drying oil |
| D. | Do not contain pigment |
| Answer» B. Are same as varnish | |
| 915. |
Resistance to fusion of the refractory under a steady rising temperature condition is called |
| A. | Spalling |
| B. | Refractoriness |
| C. | Both A & B |
| D. | Neither A nor B |
| Answer» C. Both A & B | |
| 916. |
Alcohol content in freshly prepared natural and fortified wine may be respectively around __________ percent. |
| A. | 7-14 and 14-30 |
| B. | 7-14 and 40-50 |
| C. | 14 - 30 and 40-50 |
| D. | 10 - 20 and 40 - 50 |
| Answer» B. 7-14 and 40-50 | |
| 917. |
Sea weeds are an important source of |
| A. | Fluorine |
| B. | Chlorine |
| C. | Bromine |
| D. | Iodine |
| Answer» E. | |
| 918. |
Oils and fats are converted to soap in a process called |
| A. | Hydrogenation |
| B. | Esterification |
| C. | Saponification |
| D. | None of these |
| Answer» D. None of these | |
| 919. |
Most commonly used rubber vulcanising agent is |
| A. | Sulphur |
| B. | Bromine |
| C. | Platinum |
| D. | Alumina |
| Answer» B. Bromine | |
| 920. |
Massacuits is a terminology used in the __________ industry. |
| A. | Paint |
| B. | Oil hydrogenation |
| C. | Soap |
| D. | Sugar |
| Answer» E. | |
| 921. |
Sulphuric acid is mainly used in the __________ industry. |
| A. | Fertiliser |
| B. | Steel |
| C. | Paper |
| D. | Paint |
| Answer» B. Steel | |
| 922. |
Rosin soap is added during paper manufacture to |
| A. | Impart adhesive properties |
| B. | Improve opacity |
| C. | Impart resistance to penetration by liquids |
| D. | None of these |
| Answer» D. None of these | |
| 923. |
The main aim behind cooling the digested chip at the bottom portion of the digestor by injecting cold black liquor is to |
| A. | Avoid mechanical weakening of fibre |
| B. | Remove lignin by way of crystallisation |
| C. | Increase the cellulose content |
| D. | None of these |
| Answer» B. Remove lignin by way of crystallisation | |
| 924. |
__________ of rubber decreases after its vulcanisation. |
| A. | Resistance to the action of organic solvent |
| B. | Tackiness |
| C. | Maximum service temperature |
| D. | Tensile strength |
| Answer» C. Maximum service temperature | |
| 925. |
Which of the following contains least amount of N₂? |
| A. | Coke oven gas |
| B. | Blast furnace gas |
| C. | Producer gas |
| D. | Water gas (blue gas) |
| Answer» B. Blast furnace gas | |
| 926. |
In the manufacture of H₂SO₄, vanadium catalyst as compared to platinum catalyst |
| A. | Gives higher conversion efficiency |
| B. | Has a longer life and is not poisoned by arsenic |
| C. | Handles lower SO₂ content gas (7 -10% SO₂), thus increasing the capital cost of the plant |
| D. | All of the above |
| Answer» E. | |
| 927. |
Dacron (or terylene) fibres as compared to nylon's fibres have |
| A. | Better heat & acid resistant properties |
| B. | Poorer resistance to alkalis |
| C. | Poorer dyeability |
| D. | All of the above |
| Answer» E. | |
| 928. |
Which of the following is not produced commercially from sea water? |
| A. | Magnesium & potassium compounds |
| B. | Common salt |
| C. | Bromine |
| D. | Iodine |
| Answer» E. | |
| 929. |
The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is |
| A. | Dilute H₂SO₄ |
| B. | Oleum |
| C. | Ultraviolet light |
| D. | None of these |
| Answer» C. Ultraviolet light | |
| 930. |
Trinitrotoluene (TNT), an explosive, is made by the nitration of |
| A. | Nitrobenzene |
| B. | Toluene |
| C. | Nitrotoluene |
| D. | Benzene |
| Answer» C. Nitrotoluene | |
| 931. |
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. | |
| 932. |
Magnesium and calcium __________ cause temporary hardness of water. |
| A. | Carbonates |
| B. | Bicarbonates |
| C. | Phosphates |
| D. | Sulphates |
| Answer» C. Phosphates | |
| 933. |
Flash point of most vegetable oils is about __________ °C. |
| A. | 50 |
| B. | 100 |
| C. | 200 |
| D. | 300 |
| Answer» D. 300 | |
| 934. |
Prussian blue is chemically represented by |
| A. | FeO.TiO₂ |
| B. | Ca SO₄ . 2H₂O |
| C. | Fe₄ [Fe (CN₆)₃] |
| D. | AlF₃ . 3NaF |
| Answer» D. AlF₃ . 3NaF | |
| 935. |
Salt cake is chemically represented by |
| A. | Na₂SO₄ |
| B. | CaSO₄.1/2 H₂O |
| C. | MgSO₄ |
| D. | BaSO₄ |
| Answer» B. CaSO₄.1/2 H₂O | |
| 936. |
Sucrose content in the raw juice extracted from sugar cane is about __________ percent. |
| A. | 1 - 2 |
| B. | 15 - 20 |
| C. | 50 - 60 |
| D. | 80 - 85 |
| Answer» C. 50 - 60 | |
| 937. |
Which of the following is a disacchride? |
| A. | Sucrose |
| B. | Glucose |
| C. | Starch |
| D. | Maltose |
| Answer» B. Glucose | |
| 938. |
Bisphenol A is produced by the condensation of acetone with |
| A. | Formaldehyde |
| B. | Ethyl alcohol |
| C. | Diethyl ether |
| D. | Phenol |
| Answer» E. | |
| 939. |
Separation of fresh water from sea water can be done by the __________ operation. |
| A. | Osmosis |
| B. | Reverse osmosis |
| C. | Absorption |
| D. | Adsorption |
| Answer» C. Absorption | |
| 940. |
Ore concentration by froth floatation utilises the __________ of ore particles. |
| A. | Density difference |
| B. | Wetting characteristics |
| C. | Terminal velocities |
| D. | None of these |
| Answer» C. Terminal velocities | |
| 941. |
__________ is used as a flux in the extraction of iron from iron ore (hametite) in blast furnace. |
| A. | Bauxite |
| B. | Limestone |
| C. | Quartz |
| D. | Manganese |
| Answer» C. Quartz | |
| 942. |
Helium is produced on commercial scale from |
| A. | Air |
| B. | Natural gas |
| C. | Coke oven gas |
| D. | None of these |
| Answer» C. Coke oven gas | |
| 943. |
The drug used in contraceptives is |
| A. | Sulphadizene |
| B. | Mestranol |
| C. | Methyl salicylate |
| D. | Pencillin |
| Answer» C. Methyl salicylate | |
| 944. |
Use of hydrated lime in water treatment |
| A. | Before filtration, reduces the bacterial load on filters |
| B. | After filtration, combats the corrosive-ness of water due to the presence of O₂ & CO₂ |
| C. | Is to adjust the pH value |
| D. | All of the above |
| Answer» E. | |
| 945. |
Presence of sodium tripolyphosphate (an additive) in synthetic detergent |
| A. | Facilitates its use even in hard water (by sequestering the water-hardening Ca & Mg ions) |
| B. | Inhibits its corrosive effects |
| C. | Does not allow redeposition of dirt on the cleaned surface |
| D. | None of these |
| Answer» B. Inhibits its corrosive effects | |
| 946. |
Pick out the wrong statement. Iodine value of an oil or fat is |
| A. | The number of grams of iodine taken up by 100 gm of oil or fat |
| B. | A measure of its unsaturation |
| C. | Helpful in findings its adulteration & its suitability for making soap |
| D. | Independent of the type of oil, whether it is drying or non-drying |
| Answer» E. | |
| 947. |
DDT stands for |
| A. | Diethyl-diphenyl-trichloromethane |
| B. | Dichloro-diphenyl-trichloromethane |
| C. | Diphenyl-dichloro-trichloromethane |
| D. | Dichloro-diphenyl-trichloroethane |
| Answer» E. | |
| 948. |
Catalytic oxidation of naphthalene produces |
| A. | Styrene |
| B. | Phenol |
| C. | Phthalic anhydride |
| D. | None of these |
| Answer» D. None of these | |
| 949. |
Dacron is a/an |
| A. | Polyester |
| B. | Unsaturated polyster |
| C. | Polyamide |
| D. | Inorganic polymer |
| Answer» B. Unsaturated polyster | |
| 950. |
Dacron is a |
| A. | Condensation product of hexam-ethylene diamine and adipic acid |
| B. | Thermosetting material |
| C. | Condensation product of dimethyl terephthalate and ethylene glycol |
| D. | None of these |
| Answer» E. | |