1st Mock Test (AFNS)By abdulslambsn@gmail.com / July 9, 2025 First Mock Test (AFNS) Your Good Name: Your City: Email: 1. Which of the following is not a postulate of Dalton’s Atomic Theory? Atoms are indivisible Atoms of same element are identical Atoms can be created or destroyed Atoms combine in simple whole-number ratios None 2. 1 mole of oxygen gas (O₂) contains: 6.022×10²³ atoms 3.011×10²³ molecules 6.022×10²³ molecules 1.204×10²⁴ atoms None 3. Molecular formula of a compound is double its empirical formula. Its empirical formula mass is 30. What is its molecular mass? 30 60 15 90 None 4. 88 grams of CO₂ contains how many moles? 2 4 0.5 1 None 5. Limiting reagent is one that: Is present in excess Decides product amount Has larger molar mass None of these None 6. Mass of 0.5 mole of H₂SO₄ is: 49 g 98 g 24.5 g 50 g None 7. The technique used to separate a soluble solid from a liquid is: Sublimation Filtration Evaporation Distillation None 8. Fractional distillation is used to separate: Ethanol and water Oil and water Salt and sand Iron from sulphur None 9. The apparatus used for crystallization is: Separating funnel China dish Fractionating column Burette None 10. In chromatography, the solvent is called: Stationary phase Mobile phase Retardant Solute None 11. Filtration is used when: Both solute and solvent are liquids Solute is insoluble Mixture is homogeneous None of these None 12. Purpose of using cotton plug in distillation is: Purpose of using cotton plug in distillation is: Prevent vapors escaping Increase boiling Cool the liquid None 13. Which law states that pressure is inversely proportional to volume? Charles's Law Boyle's Law Avogadro’s Law Dalton’s Law None 14. Real gases deviate from ideal behavior at: High temperature, low pressure High pressure, low temperature Low volume, high temp Normal conditions None 15. According to kinetic theory, gas pressure is due to: Weight of particles Attractive forces Collisions with container walls Size of particles None 16. At STP, 1 mole of any gas occupies: 22.4 mL 22.4 L 2.24 L 1.12 L None 17. Which gas shows maximum deviation from ideal behavior? N₂ H₂ NH₃ He None 18. Which of the following is not an assumption of ideal gas? No force of attraction Random motion Definite volume Elastic collisions None 19. Intermolecular forces are weakest in: Solids Liquids Gases Crystals None 20. Which has highest boiling point? Ether Water Alcohol Acetone None 21. Surface tension increases with: Decrease in temperature Increase in temperature High vapor pressure Weak IMF None 22. Evaporation causes: Heating Cooling No effect Condensation None 23. Which crystal has covalent bonding? Diamond NaCl Iodine Ice None 24. Vapor pressure of a liquid increases with: Decrease in temperature Increase in IMF Increase in temperature None of these None 25. Which statement best explains why biology is considered a multidisciplinary science? It includes only the study of animals. It focuses only on environmental factors. It integrates chemistry, physics, and mathematics in understanding life processes. It studies only structural organization in organisms. None 26. The branch of biology that deals with the study of internal structures using imaging techniques is: Histology Anatomy Biotechnology Morphology None 27. Which of the following statements about the level of biological organization is incorrect? Tissues are made of similar types of cells. Organs are composed of different types of tissues. Populations include multiple species in one area. Ecosystems include both living and non-living components. None 28. Which of the following scientists is credited with coining the term "Biology"? Aristotle Ibn al-Nafis Lamarck and Treviranus Carolus Linnaeus None 29. The main reason biology is considered a science is because it: Only studies animals and plants. Involves memorization of facts. Uses the scientific method to solve biological problems. Describes life based on ancient texts. None 30. Which discipline would most likely be used to study the interactions between organisms and their environment? Paleontology Taxonomy Ecology Genetics None 31. Which tool is essential for observing living cells in detail? Compound microscope Dissecting needle Hand lens Thermometer None 32. Which of the following pairs is mismatched in terms of biological careers? Pharmacologist – Studies drug effects Geneticist – Studies inheritance Marine Biologist – Studies space organisms Biotechnologist – Uses biology in industrial processes None 33. Which of the following is a valid hypothesis? Water is wet. If fertilizer is added, plant growth will increase. Plants are green. The sun rises in the east. None 34. Which is not a characteristic of living organisms? Homeostasis Reproduction Crystallization Response to stimuli None 35. What is the mass of 2.5 moles of NaCl? (Molar mass of NaCl = 58.5 g/mol) 146.25 g 117.0 g 100.0 g 145.0 g None 36. How many molecules are there in 5 grams of water? (Molar mass H₂O = 18 g/mol, NA = 6.022×10²³) 1.67×10²³ 6.022×10²³ 3.34×10²³ 1.2×10²² None 37. A gas occupies 300 mL at 1 atm. What volume will it occupy at 2 atm? (Temperature constant) 600 mL 150 mL 100 mL 200 mL None 38. What is the volume occupied by 2 moles of an ideal gas at STP? 22.4 L 11.2 L 44.8 L 33.6 L None 39. If a liquid has a density of 1.5 g/mL, what is the mass of 250 mL? 325 g 375 g 400 g 300 g None 40. A solution contains 5 g of NaOH in 500 mL. What is its molarity? (Molar mass of NaOH = 40 g/mol) 0.25 M 0.5 M 0.2 M 1.0 M None 1 out of 4 Thanks For Submitting Your Quiz !!