MCQOPTIONS
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MCQOPTIONS
This section includes 8247 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 3601. |
Sodium bisulphite is used for __________ water. |
| A. | deaeration |
| B. | dechlorination |
| C. | both (a) & (b) |
| D. | neither (a) nor(b) |
| Answer» D. neither (a) nor(b) | |
| 3602. |
Riboflavin is a/an |
| A. | vitamin |
| B. | analgesic drug |
| C. | anaesthetics |
| D. | anti-malarial drug |
| Answer» B. analgesic drug | |
| 3603. |
Flash point of most vegetable oils is about __________ C. |
| A. | 50 |
| B. | 100 |
| C. | 200 |
| D. | 300 |
| Answer» D. 300 | |
| 3604. |
The ideal pulp for the manufacture of paper should have high __________ content. |
| A. | cellulose |
| B. | lignin |
| C. | both (a) & (b) |
| D. | none of these |
| Answer» B. lignin | |
| 3605. |
At very high concentration of enzymes, the rate of fermentation chemical reaction is __________ the concentration of reactants. |
| A. | independent of |
| B. | directly proportional to |
| C. | inversely proportional to |
| D. | proportional to the square of |
| Answer» B. directly proportional to | |
| 3606. |
Which of the following is a constituent of vinegar ? |
| A. | Around 10% alcohol |
| B. | Around 1% acetic acid |
| C. | Both (a) and (b) |
| D. | Neither (a) nor (b) |
| Answer» D. Neither (a) nor (b) | |
| 3607. |
During the manufacture of sulphuric acid, the temperature of molten sulphur is not increased beyond 160 C, as |
| A. | it is very corrosive at elevated temperature. |
| B. | its viscosity is not reduced on further heating (hence pressure drop on pumping it, cannot be further reduced). |
| C. | it decomposes on further increasing the temperature. |
| D. | none of these. |
| Answer» C. it decomposes on further increasing the temperature. | |
| 3608. |
Dehydrogenation of ethyl benzene produces |
| A. | styrene |
| B. | naphthalene |
| C. | phenol |
| D. | benzoic acid |
| Answer» B. naphthalene | |
| 3609. |
Reaction of ethylene glycol and dimethyl terephthalate (DMT) produces |
| A. | nylon-6 |
| B. | dacron |
| C. | polyester |
| D. | PVC |
| Answer» C. polyester | |
| 3610. |
Lindane is |
| A. | not a fumigant. |
| B. | BHC (Benzene Hexa Chloride) containing 99% -isomer. |
| C. | a by-product of BHC manufacture. |
| D. | both(b) and (c). |
| Answer» C. a by-product of BHC manufacture. | |
| 3611. |
Solvay process is not used for the manufacture of potassium carbonate, because of the reason that potassium bicarbonate |
| A. | is prone to thermal decomposition. |
| B. | has high water solubility and is unstable. |
| C. | is soluble in ammonium chloride and potassium chloride solution. |
| D. | all (a), (b) and (c). |
| Answer» D. all (a), (b) and (c). | |
| 3612. |
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) | |
| 3613. |
__________ is the major constituent of the Portland cement. |
| A. | Calcium carbonate |
| B. | Calcium oxide |
| C. | Tricalcium silicate |
| D. | Calcium sulphate |
| Answer» D. Calcium sulphate | |
| 3614. |
Catalytic oxidation of naphthalene produces |
| A. | styrene |
| B. | phenol |
| C. | phthalic anhydride |
| D. | none of these |
| Answer» D. none of these | |
| 3615. |
Parathion and Malathion are |
| A. | pesticides. |
| B. | plasticisers for unsaturated polysters. |
| C. | pain-relieving drugs (analgesic). |
| D. | tranquilisers. |
| Answer» B. plasticisers for unsaturated polysters. | |
| 3616. |
Transparent soaps (e.g. Pears) are |
| A. | usually soft soap (made from coconut oil) in which cane sugar & alcohol are added and finally washed with methylated spirit to achieve transparency. |
| B. | metallic soaps with frothing agent and free stearic acid to achieve transparency. |
| C. | metallic soaps with frothing agent from which glycerine has not been recovered. |
| D. | none of these. |
| Answer» B. metallic soaps with frothing agent and free stearic acid to achieve transparency. | |
| 3617. |
Raw material used in alcohol distilleries in India is |
| A. | molasses |
| B. | benzol |
| C. | methylated spirit |
| D. | none of these |
| Answer» B. benzol | |
| 3618. |
Oil produced by solvent extraction |
| A. | has low free fatty acid content. |
| B. | is odourless. |
| C. | both (a) &(b). |
| D. | neither (a) nor (b). |
| Answer» E. | |
| 3619. |
High acid value of an oil or fat is an indication of |
| A. | storage under improper conditions. |
| B. | absence of unsaturation. |
| C. | its smaller molecular weight. |
| D. | none of these. |
| Answer» B. absence of unsaturation. | |
| 3620. |
Yeast is used in the manufacture of |
| A. | pencillin |
| B. | antibiotics |
| C. | wine |
| D. | pasteurised milk |
| Answer» D. pasteurised milk | |
| 3621. |
Liquefaction of gases can not be done by |
| A. | exchange of heat with colder stream. |
| B. | adiabatic expansion through a throttle valve (Joule-Thomson expansion). |
| C. | merely compressing it beyond critical pressure. |
| D. | adiabatic expansion against a piston or in a turbine. |
| Answer» D. adiabatic expansion against a piston or in a turbine. | |
| 3622. |
Reverse osmosis is normally used for the |
| A. | separation of isotopes of uranium from gaseous uranium hexaflouride. |
| B. | separation of helium from natural gas. |
| C. | desalination of brackish water to produce potable (drinking) water. |
| D. | purification of oxygen. |
| Answer» D. purification of oxygen. | |
| 3623. |
Hydrazine is largely used |
| A. | as a starting material for 'hypo'. |
| B. | in photographic industry. |
| C. | as rocket fuel. |
| D. | in printing industry. |
| Answer» D. in printing industry. | |
| 3624. |
Pencillin is made employing __________ fermentation process. |
| A. | continuous |
| B. | aerobic batch |
| C. | anaerobic batch |
| D. | none of these |
| Answer» C. anaerobic batch | |
| 3625. |
Nylon 66 is so named because the |
| A. | average degree of polymerisation of the polymer is 1966. |
| B. | number of carbon atoms between two nitrogen atoms are 6. |
| C. | number of nitrogen atoms between two carbon atoms are 6 |
| D. | polymer was first synthesised in 1966. |
| Answer» B. number of carbon atoms between two nitrogen atoms are 6. | |
| 3626. |
Concentration of NaOH solution produced by diaphragm electrolytic cell is about __________ percent. |
| A. | 10 |
| B. | 25 |
| C. | 50 |
| D. | 98 |
| Answer» B. 25 | |
| 3627. |
Glauber's salt is chemically |
| A. | calcium sulphate |
| B. | potassium sulphate |
| C. | potassium chlorate |
| D. | none of these |
| Answer» E. | |
| 3628. |
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. | |
| 3629. |
Which is a high grade pulp ? |
| A. | Rag pulp |
| B. | Mechanical pulp |
| C. | Sulphate pulp |
| D. | Sulphite pulp |
| Answer» D. Sulphite pulp | |
| 3630. |
Stereospecific agents are exemplified by |
| A. | radiation |
| B. | supported metal oxide catalysts |
| C. | ziegler catalysts |
| D. | all (a), (b) & (c) |
| Answer» E. | |
| 3631. |
Starting material for the production of butadiene in India is |
| A. | naphthalene |
| B. | benzol |
| C. | ethyl alcohol |
| D. | phthalic anhydride |
| Answer» D. phthalic anhydride | |
| 3632. |
Yellow phosphorus is transported under |
| A. | air |
| B. | water |
| C. | nitrogen |
| D. | helium |
| Answer» C. nitrogen | |
| 3633. |
White phosphorous is stored under water, because |
| A. | it does not react with water. |
| B. | it is poisonous. |
| C. | its kindling temperature in dry air is very low. |
| D. | it is unstable. |
| Answer» D. it is unstable. | |
| 3634. |
__________ is not a constituent of gun powder. |
| A. | Carbon |
| B. | Charcoal |
| C. | Sulphur |
| D. | Potassium nitrate |
| Answer» B. Charcoal | |
| 3635. |
Hydrophilic group of a soap or detergent solution is |
| A. | water hating |
| B. | soil loving |
| C. | water loving |
| D. | none of these |
| Answer» D. none of these | |
| 3636. |
Exothermic condensation reaction of monochlorobenzene with chloral in presence of 20% oleum as catalyst produces DDT. The reaction temperature is maintained at __________ C. |
| A. | 15-30 |
| B. | 90-100 |
| C. | 250-300 |
| D. | <0 |
| Answer» B. 90-100 | |
| 3637. |
Sand and __________ is fused at 1300 C, to produce sodium silicate. |
| A. | limestone |
| B. | soda ash |
| C. | coke |
| D. | sodium sulphate |
| Answer» C. coke | |
| 3638. |
Coke used for the production of calcium carbide should have |
| A. | low ash content. |
| B. | low ignition temperature. |
| C. | high electrical resistivity. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 3639. |
Sucrose is a disaccharide consisting of |
| A. | glucose and glucose |
| B. | glucose and fructose |
| C. | glucose and galactose |
| D. | fructose and galactose |
| Answer» C. glucose and galactose | |
| 3640. |
Titanium dioxide is a/an __________ colour pigment. |
| A. | white |
| B. | black |
| C. | yellow |
| D. | blue |
| Answer» B. black | |
| 3641. |
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. | |
| 3642. |
Cellulose percentage in bamboo fibre is about |
| A. | 10 |
| B. | 20 |
| C. | 50 |
| D. | 85 |
| Answer» D. 85 | |
| 3643. |
In the Solvay process, the product from the calciner is |
| A. | light soda ash |
| B. | dense soda ash |
| C. | sodium bicarbonate |
| D. | dehydrated soda ash |
| Answer» B. dense soda ash | |
| 3644. |
Commercially ethylene is produced from naphtha by |
| A. | catalytic cracking. |
| B. | catalytic dehydrogenation. |
| C. | pyrolysis. |
| D. | hydrocracking. |
| Answer» E. | |
| 3645. |
Poly Vinyl Chloride (P.V.C.) is a __________ material. |
| A. | thermosetting |
| B. | thermoplastic |
| C. | fibrous |
| D. | chemically active |
| Answer» C. fibrous | |
| 3646. |
Pig iron is produced by blast furnaces in India using mostly the iron ore named |
| A. | hematite |
| B. | magnetite |
| C. | siderite |
| D. | chalcopyrite |
| Answer» B. magnetite | |
| 3647. |
The difference between saponification value and acid value is |
| A. | called ester value. |
| B. | always negative. |
| C. | constant for all fatty oils. |
| D. | none of these. |
| Answer» B. always negative. | |
| 3648. |
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 | |
| 3649. |
Calcination of limestone is not done in a __________ kiln for producing lime. |
| A. | vertical shaft |
| B. | rotary |
| C. | fluidised bed |
| D. | fixed bed |
| Answer» E. | |
| 3650. |
Neoprene is a |
| A. | monomer |
| B. | synthetic rubber |
| C. | polyester |
| D. | none of these |
| Answer» C. polyester | |