Free Chemical Process Principles MCQs with Answers

• A. Caustic soda
• B. Hydrochloric acid
• C. Bromine from sea water
• D. Soda ash

Explanation: The Le-Blanc process converts common salt into sodium carbonate, commonly called soda ash, through sodium sulphate and subsequent reaction…

• A. Enzyme
• B. Substrate
• C. Nutrient
• D. None of these

Explanation: An enzyme is a biological catalyst formed by living cells that can catalyse reactions outside the cell without being consumed.

• A. Metals
• B. Refractories
• C. Alloys
• D. Non-metals

Explanation: In the conventional classification used for electroplating, refractory materials are not directly suitable as cathodes because they are…

• A. Calcium chloride
• B. Potassium sulphate
• C. Sodium sulphate
• D. Calcium sulphate

Explanation: Gypsum is calcium sulphate dihydrate, CaSO₄·2H₂O. Calcium chloride is a different calcium salt, while the other options are sulphates of…

• A. An explosive
• B. Used in glycerine manufacture
• C. Used in dye manufacture
• D. None of these

Explanation: Trinitrotoluene, or TNT, is an aromatic nitro compound used as a high explosive.

• A. Chlorine
• B. Ferric sulphate
• C. Calcium sulphate
• D. Activated carbon

Explanation: Ferric sulphate destabilizes suspended colloidal particles by neutralizing their charges, allowing them to form removable flocs.

• A. Jena
• B. Crookes
• C. Flint
• D. Pyrex

Explanation: Flint glass is traditionally used for electric bulbs because it is clear, readily fusible, and suitable for forming bulb envelopes.

• A. Cutting
• B. Fibrillation
• C. Hydration
• D. Strengthening

Explanation: A Hollander beater cuts fibers, fibrillates their surfaces, and hydrates them to improve bonding in paper.

• A. Used for paper making
• B. Used as a cattle feed
• C. Highly acidic in nature
• D. None of these

Explanation: Massecuite is the mixture of sugar crystals and mother liquor produced during sugar crystallization.

• A. Is prone to thermal decomposition
• B. Is soluble in ammonium chloride and potassium chloride solution
• C. Has high water solubility and is unstable
• D. All A , B. and C.

Explanation: The Solvay process depends on precipitating a sparingly soluble bicarbonate, but potassium bicarbonate remains soluble in the ammonium…

• A. Water
• B. Liquid ammonia
• C. Kerosene oil
• D. Alcohol

Explanation: Potassium reacts vigorously with water and can react with alcohol, so it is stored and transported under kerosene oil.

• A. Hydrogenation
• B. Esterification
• C. None of these
• D. Saponification

Explanation: Saponification is the alkaline hydrolysis of fats or oils, producing glycerol and the alkali-metal salts of fatty acids, which are soaps.

• A. Same as thermosetting phenol-formaldehyde
• B. An inorganic polymer
• C. Same as Polytetrafluoroethylene (PTFE)
• D. Not a polymer

Explanation: Bakelite is the cross-linked thermosetting resin formed from phenol and formaldehyde.

• A. Fluorine
• B. Iodine
• C. Bromine
• D. Chlorine

Explanation: Seaweeds concentrate iodine from seawater, making them a traditional industrial source of iodine.

• A. Anaesthetics
• B. Analgesic drug
• C. Vitamin
• D. Anti-malarial drug

Explanation: Riboflavin is vitamin B2, a water-soluble vitamin involved in cellular energy metabolism.

• A. CH4, & CO
• B. CO, & CO2
• C. H2, & CO
• D. H2, & CH4

Explanation: Coke-oven gas is produced during destructive distillation of coal and contains mainly hydrogen and methane, with smaller amounts of carbon…

• A. 70
• B. 55
• C. 80
• D. 94

Explanation: Coal-tar pitch is the carbon-rich residue left after distillation, with carbon content commonly taken as about 94 percent.

• A. Penicillin
• B. Wine
• C. Antibiotics
• D. Pasteurised milk

Explanation: Yeast ferments sugars anaerobically to produce ethanol and carbon dioxide, which is the essential step in wine manufacture.

• A. Platinum
• B. Bromine
• C. Sulphur
• D. Alumina

Explanation: Sulphur is the conventional vulcanising agent for most general-purpose rubbers, forming cross-links between polymer chains on heating.

• A. Emit poisonous vapour
• B. Kill insects following external bodily contact
• C. Are stomach poisons
• D. Are absorbed throughout the plant

Explanation: Systemic insecticides are taken up by a plant and transported through its tissues, so insects feeding on or contacting the treated plant…