Which of the following is an acidic oxide? (A) CO (B) CO₂ (C) Na₂O (D) CaO Answer: (B)
The catalyst used in Haber process is – (A) Nickel (B) Platinum (C) Iron (D) Copper Answer: (C)
Which property is responsible for the electrical conductivity of metals? (A) Mobile protons (B) Free electrons (C) Cations (D) High density Answer: (B)
Which vitamin helps in blood clotting? (A) Vitamin A (B) Vitamin B₁₂ (C) Vitamin K (D) Vitamin D Answer: (C)
Which of the following is not a mixture? (A) Milk (B) Air (C) Brass (D) Water Answer: (D)
Which of the following has highest electron affinity? (A) Oxygen (B) Fluorine (C) Chlorine (D) Nitrogen Answer: (C)
Which of the following is not a chemical change? (A) Rusting of iron (B) Boiling of water (C) Burning of coal (D) Digestion of food Answer: (B)
Which gas is used to make drinking water free from germs? (A) Nitrogen (B) Fluorine (C) Chlorine (D) Hydrogen Answer: (C)
The metal present in chlorophyll is – (A) Iron (B) Magnesium (C) Copper (D) Calcium Answer: (B)
Which of the following is used to neutralize excess acid in stomach? (A) Vinegar (B) Citric acid (C) Baking soda (D) Sulfuric acid Answer: (C)
Which of these is a natural polymer? (A) Polythene (B) Nylon (C) Starch (D) PVC Answer: (C)
Which of the following has the highest pH? (A) Lemon juice (B) Vinegar (C) Soap solution (D) Tomato juice Answer: (C)
Which of the following is used as a drying agent? (A) Water (B) Sodium chloride (C) Calcium chloride (D) Ammonia Answer: (C)
The radioactive isotope used in radiocarbon dating is – (A) C-12 (B) C-14 (C) C-13 (D) U-235 Answer: (B)
Which of the following is used to detect radiation? (A) Thermometer (B) Barometer (C) Geiger-Muller counter (D) Ammeter Answer: (C)
Which of these compounds is aromatic? (A) CH₄ (B) C₂H₆ (C) C₆H₆ (D) C₃H₈ Answer: (C)
Which gas has highest calorific value? (A) CO (B) CH₄ (C) H₂ (D) C₂H₆ Answer: (C)
What is the common name for Na₂CO₃·10H₂O? (A) Washing soda (B) Baking soda (C) Caustic soda (D) Soda ash Answer: (A)
Which substance sublimes on heating? (A) Iodine (B) Sulfur (C) Phosphorus (D) Iron Answer: (A)
Which of the following compounds contains nitrogen? (A) Urea (B) Glucose (C) Methane (D) Ethanol Answer: (A)
What is the pH of pure water at 25°C? (A) 5 (B) 6 (C) 7 (D) 8 Answer: (C)
The atomic number of fluorine is – (A) 7 (B) 8 (C) 9 (D) 10 Answer: (C)
Which chemical is used in photography? (A) Silver nitrate (B) Sodium hydroxide (C) Copper sulfate (D) Sodium carbonate Answer: (A)
Which gas is known as ‘water gas’? (A) CO₂ (B) CO + H₂ (C) CH₄ (D) N₂ + H₂ Answer: (B)
The hybridization of carbon in ethene is – (A) sp (B) sp² (C) sp³ (D) dsp² Answer: (B)
Which oxide is amphoteric in nature? (A) Na₂O (B) Al₂O₃ (C) CO₂ (D) SO₂ Answer: (B)
Which of the following is a semimetal? (A) Sulfur (B) Silicon (C) Iron (D) Lead Answer: (B)
Which pair of elements form an ionic bond? (A) Na and Cl (B) C and H (C) N and O (D) H and O Answer: (A)
The energy required to break one mole of bonds in gaseous molecules is – (A) Ionization energy (B) Electron affinity (C) Bond enthalpy (D) Lattice energy Answer: (C)
Which of the following is an ore of zinc? (A) Galena (B) Bauxite (C) Sphalerite (D) Hematite Answer: (C)
Which part of an atom carries no charge? (A) Electron (B) Proton (C) Neutron (D) Nucleus Answer: (C)
Which of the following turns blue litmus red? (A) NaOH (B) KOH (C) HCl (D) NH₃ Answer: (C)
The name of the functional group –CO– is – (A) Ketone (B) Aldehyde (C) Alcohol (D) Acid Answer: (A)
Which of the following is used to detect starch in food? (A) Benedict’s solution (B) Iodine solution (C) Litmus (D) Methyl orange Answer: (B)
A radioactive element emits – (A) Only alpha (B) Only beta (C) Only gamma (D) Alpha, beta, or gamma Answer: (D)
The number of neutrons in deuterium is – (A) 0 (B) 1 (C) 2 (D) 3 Answer: (B)
Which of the following is an isomer of butane? (A) Ethene (B) Propane (C) Isobutane (D) Pentane Answer: (C)
Which of the following is a monomer of proteins? (A) Glucose (B) Fatty acid (C) Amino acid (D) Nucleotide Answer: (C)
Which of the following is a non-metallic conductor? (A) Iodine (B) Graphite (C) Sulfur (D) Phosphorus Answer: (B)
Which vitamin is water-soluble? (A) A (B) B-complex (C) D (D) E Answer: (B)
Which gas is responsible for depletion of ozone layer? (A) CO₂ (B) CH₄ (C) CFCs (D) O₂ Answer: (C)
Which metal is most reactive among alkali metals? (A) Lithium (B) Sodium (C) Potassium (D) Cesium Answer: (D)
The IUPAC name of acetylene is – (A) Ethene (B) Ethyne (C) Ethanol (D) Ethanal Answer: (B)
Which substance is used in the preparation of soap? (A) Alcohol (B) Ester (C) Fat + Alkali (D) Acid Answer: (C)
What is formed when an acid reacts with a metal? (A) Salt only (B) Salt and hydrogen (C) Salt and oxygen (D) Salt and water Answer: (B)
Which compound is responsible for acid rain? (A) CO (B) SO₂ (C) CH₄ (D) O₃ Answer: (B)
Which of the following is a biodegradable waste? (A) Plastic (B) Glass (C) Vegetable peels (D) Polyethylene Answer: (C)
Which organic compound is used as antifreeze in car radiators? (A) Glycerol (B) Ethanol (C) Methanol (D) Ethylene glycol Answer: (D)
Which of the following is not a petrochemical? (A) Gasoline (B) Diesel (C) Kerosene (D) Cotton Answer: (D)
The chemical name of table sugar is – (A) Sucrose (B) Fructose (C) Glucose (D) Lactose Answer: (A)
