Chemistry Final Quiz 2025–26

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Core chem topics review

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Siena Whiting

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Chemistry Final Quiz 2025–26


Chemistry Final Quiz 2025–26Versión en línea Core chem topics review por Siena Whiting 1 What is the mole ratio in CaCl2 and H2O when dissolving salt in water to form Ca2+ and Cl- ions? a CaCl2 remains intact as a molecule b CaCl2 dissociates to Ca2+ and 2 Cl- c Ca2+ and Cl- form neutral CaCl2 d Ca2+ binds water to become Ca(OH)2 2 Which law relates pressure, volume, and temperature for a fixed amount of gas? a Avogadro’s Law (V ∝ n) b Combined Gas Law (P1V1/T1 = P2V2/T2) c Charles’s Law (V ∝ T) d Boyle’s Law (P ∝ 1/V) 3 Which type of bond involves the unequal sharing of electrons creating partial charges? a Ionic bond b Polar covalent bond c Nonpolar covalent bond d Metallic bond 4 In an endothermic reaction, is ΔH positive or negative? a Positive b Negative c Undefined d Zero 5 Which acid–base theory uses the transfer of protons (H+)? a Bronsted–Lowry b Lewis c Bronsted–Lowry–Lewis hybrid d Arrhenius 6 What is the pH of a neutral solution at 25°C? a 7 b 14 c 5 d 0 7 Which process occurs when a solid dissolves and forms a solution without a chemical reaction? a Dissolution (solvation) b Combustion c Precipitation d Electrolysis 8 What is Avogadro’s constant? a 1.00 × 10^23 b 3.00 × 10^23 c 6.02 d 6.022 × 10^23 9 Which term describes a substance that speeds up a reaction without being consumed? a Inhibitor b Product c Reactant d Catalyst 10 Which gas law explains why a balloon shrinks as it’s cooled at constant pressure? a Gay-Lussac’s Law (P ∝ T) b Charles’s Law (V ∝ T) c Graham’s Law (rate ∝ 1/√M) d Boyle’s Law (P ∝ 1/V) Feedback 1 Dissociation in aqueous solution yields separate ions: CaCl2 → Ca2+ + 2 Cl-. 2 The Combined Gas Law links P, V, and T for a fixed amount of gas. 3 Polar covalent bonds arise from different electronegativities between atoms. 4 Endothermic processes absorb heat, increasing enthalpy. 5 Bronsted–Lowry focuses on proton transfer between acid and base. 6 Neutral water at 25°C has pH 7. 7 Dissolution involves solute-solvent interactions without a chemical change. 8 One mole contains Avogadro’s number of particles. 9 Catalysts lower activation energy and remain unchanged. 10 At constant pressure, volume is proportional to temperature; cooler gas contracts.

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Chemistry Final Quiz 2025–26

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Chemistry Final Quiz 2025–26Versión en línea

por Siena Whiting

What is the mole ratio in CaCl2 and H2O when dissolving salt in water to form Ca2+ and Cl- ions?

Which law relates pressure, volume, and temperature for a fixed amount of gas?

Which type of bond involves the unequal sharing of electrons creating partial charges?

In an endothermic reaction, is ΔH positive or negative?

Which acid–base theory uses the transfer of protons (H+)?

What is the pH of a neutral solution at 25°C?

Which process occurs when a solid dissolves and forms a solution without a chemical reaction?

What is Avogadro’s constant?

Which term describes a substance that speeds up a reaction without being consumed?

Which gas law explains why a balloon shrinks as it’s cooled at constant pressure?

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