Which compound is used as a food preservative? a. Sodium carbonate b. Tartaric acid c. Acetic acid d. Sodium benzoate (sodium salt of benzoic acid) Ans: d
Which gas is released from fire extinguishers? a. Carbon monoxide b. Chlorine c. Carbon dioxide d. Nitrogen Ans: c
Which compound is used in Dettol as an antiseptic? a. Iodine b. Cresol c. Biothional d. Chloroxylenol Ans: d
What is dry ice chemically? a. Solid CO₂ b. Solid NO₂ c. Solid SO₂ d. Frozen water Ans: a
The bleaching action of chlorine is due to: a. Oxidation b. Hydrolysis c. Redox reaction d. Decomposition Ans: a
Which gas is used inside electric bulbs? a. Hydrogen b. Carbon dioxide c. Carbon monoxide d. Argon Ans: d
Which metal, represented by its symbol, is used to make filament in bulbs? a. Fe b. Zn c. Ag d. W (Tungsten) Ans: d
Chlorine gas is a main component of: a. Water b. Tear gas c. LPG d. Biogas Ans: b
2. Polymers, Fibres & Industrial Products
Which fibre is referred to as artificial silk? a. Nylon b. Rayon c. Polyester d. Acrylic Ans: b
Which material is used as a non-stick coating on cookware? a. Perspex b. Styrofoam c. Polystyrene d. Teflon Ans: d
Which base is present in soap? a. Sodium hydroxide b. Silicon dioxide c. Calcium hydroxide d. Ammonium hydroxide Ans: a
The by-product obtained during soap manufacturing is: a. Caustic soda b. Glycerol c. Caustic potash d. Naphthalene Ans: b
Saponification is the process used to produce: a. Soap b. Sulphur c. Plastic d. Protein Ans: a
Which synthetic detergent component is derived from petroleum hydrocarbons? a. Potassium salts of fatty acids b. Sodium salts of fatty acids c. Petroleum hydrocarbons d. Glycerides Ans: c
Which of the following is a synthetic rubber? a. Leoprene b. Monoprene c. Neoprene d. Isoprene Ans: d
Terylene is a condensation polymer of ethylene glycol and: a. Benzoic acid b. Salicylic acid c. Phthalic acid d. Terephthalic acid Ans: d
Which of the following is a natural polymer? a. Bakelite b. Nylon c. Polythene d. Starch Ans: d
3. Materials & Elements in Industry
Which industry uses potassium nitrate on a commercial scale? a. Glass manufacturing b. Electroplating c. Firecracker production d. Leather tanning Ans: c
Which material is extracted from the sea through evaporation? a. Sugar b. Iron c. Salt d. Steel Ans: c
Rock salt is rich in which mineral? a. Gypsum b. Sodium c. Potassium d. Magnesium Ans: b
In which of the following is silicon not used? a. Solar panels b. IC manufacturing c. Optical glass d. Ink pens Ans: d
4. Food, Health, & Medicine
Which class of compound helps in relieving indigestion? a. Antacid b. Antiseptic c. Analgesic d. Antibiotic Ans: a
Tincture of iodine is a solution of iodine in: a. Potassium iodide b. Ethyl alcohol c. Water d. Sodium chloride Ans: b
KMnO₄ is commonly used as a: a. Fertilizer b. Insecticide c. Disinfectant d. Pesticide Ans: c
Which of the following is an organic fertilizer produced from worms? a. Organic manure (vermicompost) b. Inorganic fertilizer c. Toxic chemical d. Soil type Ans: a
Which of the following is considered the strongest natural fibre? a. Cotton b. Jute c. Wool d. Silk Ans: d
5. Match the Following
Match the items correctly: A. Copper – 3. Antifungal B. Penicillin – 4. Antibiotic C. Urea – 1. Fertilizer D. Malathion – 2. Insecticide Ans: c
