1.Dễ
Charles's law describes the relationship between which two properties of a gas, at constant pressure?
- APressure and number of moles
- BVolume and temperature
- CDensity and mass
- DPressure and volume
Phiếu bài tập Hóa học cho kỳ thi đầu vào điều dưỡng có đáp án
2.Dễ
What are enzymes?
- AMinerals that build bone
- BFats that form most of the cell membrane
- CSugars that store energy in the liver
- DBiological catalysts, usually proteins
3.Dễ
What range does the common pH scale cover?
- A1 to 10
- B0 to 100
- C−7 to +7
- D0 to 14
4.Trung bình
A reaction has ΔH = −890 kJ/mol. What does the negative sign tell you?
- AThe reaction needs a catalyst
- BThe reaction is at equilibrium
- CThe reaction is exothermic
- DThe reaction is endothermic
5.Trung bình
Why does stirring help a solid dissolve faster?
- AIt turns the solid into a liquid
- BIt brings fresh solvent into contact with the solid's surface
- CIt raises the temperature of the solvent by friction a great deal
- DIt increases the amount of solute that can dissolve in total
6.Trung bình
In 2KClO₃ → 2KCl + 3O₂, how many moles of O₂ form from 4 mol of KClO₃?
- A3 mol
- B6 mol
- C8 mol
- D4 mol
7.Khó
What is the formula of iron(III) chloride?
- AFe₂Cl₃
- BFeCl₃
- CFeCl₂
- DFe₃Cl
8.Khó
In the reaction NH₃ + H₂O ⇌ NH₄⁺ + OH⁻, which substance acts as the Brønsted–Lowry acid?
- ANH₃
- BOH⁻
- CH₂O
- DNH₄⁺ only
Đáp án
- 1. B · Volume and temperature
- 2. D · Biological catalysts, usually proteins
- 3. D · 0 to 14
- 4. C · The reaction is exothermic
- 5. B · It brings fresh solvent into contact with the solid's surface
- 6. B · 6 mol
- 7. B · FeCl₃
- 8. C · H₂O
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