1.Dễ
According to the Arrhenius definition, what does an acid produce in water?
- AHydroxide ions (OH⁻)
- BOxide ions (O²⁻)
- CSodium ions (Na⁺)
- DHydrogen ions (H⁺)
Phiếu bài tập Hóa học cho kỳ thi đầu vào điều dưỡng có đáp án
2.Dễ
What does the double arrow (⇌) in a chemical equation show?
- AThe reaction is reversible
- BThe reaction is very fast
- CThe reaction needs a catalyst
- DThe reaction releases heat
3.Dễ
Elements in the same period of the periodic table have the same number of what?
- AProtons
- BValence electrons
- COccupied electron shells
- DNeutrons
4.Trung bình
Trong phản ứng 2H₂ + O₂ → 2H₂O, từ 3 mol oxygen tạo ra bao nhiêu mol nước?
- A1,5 mol
- B3 mol
- C6 mol
- D2 mol
5.Trung bình
On an energy diagram, the products are at a lower energy than the reactants. What kind of reaction is shown?
- AExothermic
- BEndothermic
- CNuclear
- DReversible only
6.Trung bình
A patient's arterial blood pH is 7,25. How is this described?
- AAcidosis
- BNormal
- CAlkalosis
- DNeutral
7.Khó
Glucose (C₆H₁₂O₆) and fructose (C₆H₁₂O₆) join by a condensation reaction to form sucrose. What is the formula of sucrose?
- AC₁₂H₂₀O₁₀
- BC₆H₁₂O₆
- CC₁₂H₂₂O₁₁
- DC₁₂H₂₄O₁₂
8.Khó
At room temperature chlorine (Cl₂) is a gas, bromine (Br₂) is a liquid and iodine (I₂) is a solid. What best explains this trend?
- AChlorine is ionic, while iodine is metallic
- BIodine forms hydrogen bonds but chlorine does not
- CThe covalent bond in I₂ is much stronger than in Cl₂
- DLarger molecules with more electrons have stronger dispersion forces
Đáp án
- 1. D · Hydrogen ions (H⁺)
- 2. A · The reaction is reversible
- 3. C · Occupied electron shells
- 4. C · 6 mol
- 5. A · Exothermic
- 6. A · Acidosis
- 7. C · C₁₂H₂₂O₁₁
- 8. D · Larger molecules with more electrons have stronger dispersion forces
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