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Chemistry Flashcards

11 cards from real NSAA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. Which of the following elements has the highest electronegativity?

    Answer: Fluorine

    Fluorine has the highest electronegativity of all elements, meaning it has a strong ability to attract electrons in a chemical bond.

  2. What is the molecular geometry of methane (CH₄)?

    Answer: Tetrahedral

    Methane (CH₄) has a tetrahedral molecular geometry, with four hydrogen atoms symmetrically distributed around the central carbon atom.

  3. Which of the following compounds is ionic?

    Answer: NaCl

    Sodium chloride (NaCl) is an ionic compound, consisting of positively charged sodium ions and negatively charged chloride ions.

  4. What type of reaction is represented by the following equation: 2H₂ + O₂ → 2H₂O?

    Answer: Synthesis

    The given equation represents a synthesis reaction, where two or more reactants combine to form a single product.

  5. Which of the following statements about catalysts is true?

    Answer: Catalysts speed up the reaction without being consumed.

    Catalysts increase the rate of a reaction by lowering the activation energy and are not consumed during the reaction.

  6. What is the pH of a 0.01 M solution of HCl?

    Answer: 2

    HCl is a strong acid that dissociates completely in water. The pH is calculated as -log[H⁺], so for a 0.01 M solution, pH = -log(0.01) = 2.

  7. Which of the following is the correct electron configuration for a neutral atom of sulfur (atomic number 16)?

    Answer: 1s² 2s² 2p⁶ 3s² 3p⁴

    The electron configuration for sulfur, which has 16 electrons, is 1s² 2s² 2p⁶ 3s² 3p⁴.

  8. In the periodic table, which trend is observed as you move from left to right across a period?

    Answer: Metallic character decreases

    As you move from left to right across a period, elements become less metallic and more non-metallic in character.

  9. Which of the following compounds will exhibit hydrogen bonding?

    Answer: NH₃

    Ammonia (NH₃) exhibits hydrogen bonding due to the presence of a highly electronegative nitrogen atom bonded to hydrogen atoms.

  10. What is the oxidation state of manganese in KMnO₄?

    Answer: 7

    In KMnO₄, potassium has an oxidation state of +1 and oxygen has an oxidation state of -2. To balance the charges, manganese must have an oxidation state of +7.

  11. Which type of intermolecular force is the strongest?

    Answer: Hydrogen bonds

    Hydrogen bonds are the strongest type of intermolecular force compared to London dispersion forces and dipole-dipole interactions.

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  1. esat-tmua.ac.uk — Late registration, registration deadline, fees, exam format, passing score, registration, score release, test dates, time limit, exam information · verified Oct 2026
  2. undergraduate.study.cam.ac.uk — Eligibility · verified Oct 2026
  3. pearsonvue.com — Test delivery, retake policy · verified Oct 2026