Which of the following is used as a bleaching agent? (A) Sodium chloride (B) Calcium hydroxide (C) Calcium hypochlorite (D) Ammonium chloride Answer: (C)
Which process is used to concentrate ore using water flow? (A) Froth flotation (B) Magnetic separation (C) Hydraulic washing (D) Leaching Answer: (C)
Which of these compounds is used to soften hard water? (A) NaOH (B) CaCO₃ (C) Na₂CO₃ (D) NH₄OH Answer: (C)
Which gas is responsible for the pungent smell in ammonium salts? (A) Nitrogen (B) Hydrogen (C) Ammonia (D) Methane Answer: (C)
Which property of metals allows them to be drawn into wires? (A) Malleability (B) Ductility (C) Toughness (D) Conductivity Answer: (B)
Which of these is not a characteristic of chemical change? (A) Heat is absorbed or evolved (B) Change in state (C) Formation of a new substance (D) Change in color Answer: (B)
Which among the following is a salt used in cooking? (A) Sodium hydroxide (B) Sodium chloride (C) Sodium carbonate (D) Sodium acetate Answer: (B)
Which among the following does not undergo hydrolysis? (A) Ester (B) Salt of weak acid (C) Alkane (D) Anhydride Answer: (C)
Which compound is commonly used in cold packs? (A) NaCl (B) Ammonium nitrate (C) Sodium bicarbonate (D) Potassium permanganate Answer: (B)
Which of the following is not used as a fertiliser? (A) Ammonium nitrate (B) Urea (C) Superphosphate (D) Baking soda Answer: (D)
The basic unit of a polymer is called – (A) Atom (B) Ion (C) Monomer (D) Dimer Answer: (C)
Which one is a secondary alcohol? (A) Methanol (B) Ethanol (C) Propan-2-ol (D) Butan-1-ol Answer: (C)
The drying agent for HCl gas is – (A) Conc. H₂SO₄ (B) CaCl₂ (C) Na₂SO₄ (D) MgSO₄ Answer: (A)
Which functional group is present in formaldehyde? (A) Aldehyde (B) Alcohol (C) Ketone (D) Acid Answer: (A)
Which substance is used in mothballs? (A) Camphor (B) Naphthalene (C) Benzene (D) Toluene Answer: (B)
Which type of colloid is milk? (A) Solid sol (B) Gel (C) Emulsion (D) Foam Answer: (C)
Which of the following is not soluble in water? (A) NaCl (B) Glucose (C) Benzene (D) Sugar Answer: (C)
Which metal is used in making aircrafts due to its low density? (A) Iron (B) Zinc (C) Aluminum (D) Copper Answer: (C)
What is the charge on sulfate ion? (A) –1 (B) +1 (C) –2 (D) +2 Answer: (C)
Which reagent is used in the test for unsaturation? (A) Fehling’s reagent (B) Tollen’s reagent (C) Bromine water (D) Benedict’s reagent Answer: (C)
Which of the following undergoes fermentation to form alcohol? (A) Protein (B) Fats (C) Starch (D) Fiber Answer: (C)
Which of the following is not a radioactive element? (A) Uranium (B) Thorium (C) Plutonium (D) Magnesium Answer: (D)
What is the chemical formula of marble? (A) CaCO₃ (B) CaSO₄ (C) Ca(OH)₂ (D) CaO Answer: (A)
Which of the following is responsible for temporary hardness in water? (A) Ca(HCO₃)₂ (B) CaCl₂ (C) CaSO₄ (D) MgCl₂ Answer: (A)
Which of the following does not conduct electricity? (A) Salt water (B) Copper (C) Pure water (D) Mercury Answer: (C)
Which of the following elements is not found in proteins? (A) Carbon (B) Hydrogen (C) Nitrogen (D) Phosphorus Answer: (D)
Which metal is used in making thermometer? (A) Lead (B) Mercury (C) Tin (D) Iron Answer: (B)
Which of the following is used in glass cutting tools? (A) Iron (B) Platinum (C) Diamond (D) Copper Answer: (C)
Which of these is not an alkali metal? (A) Sodium (B) Calcium (C) Lithium (D) Potassium Answer: (B)
Which of the following does not show hydrogen bonding? (A) NH₃ (B) H₂O (C) CH₄ (D) HF Answer: (C)
Which gas is released during electrolysis of brine? (A) Hydrogen (B) Oxygen (C) Chlorine (D) Both A and C Answer: (D)
Which of the following is an acid-base indicator? (A) NaOH (B) NaCl (C) Phenolphthalein (D) HCl Answer: (C)
Which chemical is responsible for wine fermentation? (A) Yeast (B) Enzyme (C) Sugar (D) All of the above Answer: (D)
Which polymer is used in plastic bottles? (A) PVC (B) PET (C) Nylon (D) Polyethylene Answer: (B)
Which of the following acids is tribasic? (A) HCl (B) H₂SO₄ (C) H₃PO₄ (D) HNO₃ Answer: (C)
Which vitamin is produced by intestinal bacteria? (A) Vitamin A (B) Vitamin B₁₂ (C) Vitamin D (D) Vitamin K Answer: (D)
Which substance is used to remove ink stains? (A) Ethanol (B) Acetone (C) Oxalic acid (D) Sulfuric acid Answer: (C)
Which compound is used as an analgesic? (A) Aspirin (B) Penicillin (C) Chloroquine (D) Streptomycin Answer: (A)
The major component of LPG is – (A) Methane (B) Propane (C) Butane (D) Ethane Answer: (C)
The electron configuration of sodium is – (A) 2, 6 (B) 2, 8 (C) 2, 8, 1 (D) 2, 8, 2 Answer: (C)
Which of these is an unsaturated hydrocarbon? (A) Methane (B) Ethane (C) Propene (D) Butane Answer: (C)
Which gas is used in water purification plants? (A) CO₂ (B) Cl₂ (C) NH₃ (D) O₂ Answer: (B)
Which of these has the highest atomic radius? (A) Na (B) Mg (C) K (D) Ca Answer: (C)
Which of the following is used to detect the presence of carbonates? (A) Limewater (B) Iodine (C) Bromine water (D) Fehling’s solution Answer: (A)
Which chemical is used in the preservation of biological specimens? (A) Formaldehyde (B) Ethanol (C) Acetic acid (D) Glycerol Answer: (A)
Which of these is a cyclic hydrocarbon? (A) Benzene (B) Methane (C) Ethyne (D) Propane Answer: (A)
The number of valence electrons in oxygen is – (A) 4 (B) 5 (C) 6 (D) 8 Answer: (C)
Which of the following acts as a base? (A) HCl (B) CH₃COOH (C) NaOH (D) CO₂ Answer: (C)
Which part of a galvanic cell is the cathode? (A) The negative electrode (B) The positive electrode (C) The salt bridge (D) The electrolyte Answer: (B)
The IUPAC name of CH₃COOH is – (A) Acetic acid (B) Formic acid (C) Ethanoic acid (D) Propanoic acid Answer: (C)
