Free Chemical Process Principles MCQs with Answers

• A. Nylon-66
• B. Nylon-6
• C. Dacron
• D. Rayon

Explanation: Polycaprolactam is the polymer formed from caprolactam and is commercially called Nylon-6.

• A. Catalyst used in shift conversion
• B. Abrasive material
• C. Naturally occuring clay which is capable of exchanging cations
• D. None of these

Explanation: Zeolite is a naturally occurring hydrated aluminosilicate mineral with a porous structure that allows exchange of cations.

• A. Glycerol
• B. Oleic acid
• C. Stearic acid
• D. Citric acid

Explanation: Vegetable oils mainly contain glycerol esters of fatty acids such as oleic and stearic acids.

• A. Shift conversion
• B. Oil hydrogenation
• C. Steaming reforming of naphtha
• D. Ammonia cracking/dissociation

Explanation: Shift conversion commonly uses iron-chromium or copper-zinc catalysts, not nickel.

• A. Colour
• B. All A , B. and C.
• C. Bacteria
• D. Turbidity

Explanation: Alum destabilizes suspended particles so they form settleable flocs, reducing turbidity and some colour.

• A. Absorption of SO3 in 98% H2SO4
• B. C + H2O = CO + H2
• C. Both B. and C.
• D. Thermal dissociation of iron pyrites

Explanation: The water-gas reaction, C + H2O → CO + H2, requires heat, and thermal dissociation of iron pyrites is also endothermic.

• A. All A , B. and C.
• B. Increases their melting point
• C. Is done in presence of nickel catalyst
• D. Is an exothermic reaction

Explanation: Hydrogenation of unsaturated vegetable oils releases heat, raises their melting point by reducing double bonds, and is commonly catalysed…

• A. The number of grams of iodine taken up by 100 gm of oil or fat
• B. Independent of the type of oil, whether it is drying or non-drying
• C. Helpful in findings its adulteration & its suitability for making soap
• D. A measure of its unsaturation

Explanation: Iodine value is the grams of iodine absorbed by 100 g of fat and indicates unsaturation.

• A. Ostwald's
• B. Solvay
• C. Bosch
• D. Haber's

Explanation: The Solvay process manufactures sodium carbonate from brine and limestone using ammonia as an intermediate reagent.

• A. Used in the treatment of T.B.
• B. Antibiotics
• C. Pain relievers
• D. Used in the treatment of typhoid

Explanation: Analgesics reduce or relieve pain without specifically treating the infectious cause.

• A. 10
• B. 20
• C. 50
• D. 85

Explanation: Bamboo fibre commonly contains about 40 to fi 60% cellulose, so 50% is the closest listed value.

• A. Large quantity of coal can be processed
• B. Low carbon conversion efficiency is achieved
• C. Entrainment of solids is higher
• D. Coking coals cannot be used

Explanation: The Lurgi gasifier is a pressurised moving-bed gasifier capable of processing large quantities of coal.

• A. MgO, SiO2, K2O
• B. CaO, SiO2, Al2O3
• C. Al2O3, MgO, Fe2O3
• D. CaO, MgO, K2O

Explanation: The principal clinker-forming oxides in cement are CaO, SiO2 and Al2O3, with Fe2O3 also present in smaller proportion.

• A. 25
• B. 250-300
• C. 150-200
• D. 60-70

Explanation: A mercury cathode cell operates at approximately 60 to 70°C and produces concentrated caustic soda, commonly around 50 to 70%.

• A. Remove unexposed silver halide
• B. Remove metallic silver
• C. Convert silver chloride to silver
• D. Brighten the faint images

Explanation: Sodium thiosulphate fixes photographic film by dissolving the unexposed silver halide, while the developed image remains as metallic…

• A. Phosphoric acid
• B. Sulphuric acid
• C. Hydrochloric acid
• D. Hydrofluoric acid

Explanation: Nitroglycerine is nitrated from glycerine using a mixed acid of nitric acid and sulphuric acid.

• A. 5
• B. 30
• C. 130
• D. 300

Explanation: Alcoholic fermentation of molasses by yeast is commonly maintained near 30 °C.

• A. Diaphragm electrolytic cell process
• B. Mercury electrolytic cell process
• C. None of these
• D. Lime-soda process

Explanation: The diaphragm and mercury chlor-alkali processes electrolyse brine and produce chlorine as a co-product.

• A. White
• B. Slag
• C. Waterproof
• D. Pozzolan

Explanation: White cement is manufactured from raw materials with very low iron oxide because iron compounds impart colour to cement.

• A. MgSO4
• B. CaSO4. ½H2O
• C. Na2SO4
• D. BaSO4

Explanation: Salt cake is an industrial name for anhydrous sodium sulphate, Na₂SO₄. The other formulas represent plaster-related calcium sulphate…