1.Dễ
Between which kinds of elements do covalent bonds usually form?
- AA metal and a nonmetal
- BA metal and a noble gas
- CTwo nonmetals
- DTwo group 1 metals
Phiếu bài tập Hóa học cho kỳ thi đầu vào điều dưỡng có đáp án
2.Dễ
What is an alpha particle made of?
- APure electromagnetic energy
- B2 protons and 2 neutrons
- CA single high-energy electron
- D1 proton and 1 electron
3.Dễ
An instant cold pack feels cold when the substance inside dissolves. How is this dissolving process classified?
- AExothermic
- BA neutralisation reaction
- CEndothermic
- DA combustion reaction
4.Trung bình
Normal saline (0,9% NaCl) is used for IV fluids. How is it described compared with blood?
- AHypertonic
- BHypotonic
- CSaturated
- DIsotonic
5.Trung bình
Which equation shows a combustion reaction?
- ACaCO₃ → CaO + CO₂
- BNaOH + HCl → NaCl + H₂O
- CC₂H₅OH + 3O₂ → 2CO₂ + 3H₂O
- DZn + CuSO₄ → ZnSO₄ + Cu
6.Trung bình
What is the name of the molecular compound CO?
- ACarbon dioxide
- BMonocarbon oxide
- CCarbon oxide
- DCarbon monoxide
7.Khó
A patient's temperature is 104 °F. What is it in degrees Celsius?
- A72 °C
- B58 °C
- C40 °C
- D43 °C
8.Khó
A reaction should produce 2 mol of a product with a molar mass of 30 g/mol, but only 48 g is collected. What is the percent yield?
- A125%
- B60%
- C80%
- D48%
Đáp án
- 1. C · Two nonmetals
- 2. B · 2 protons and 2 neutrons
- 3. C · Endothermic
- 4. D · Isotonic
- 5. C · C₂H₅OH + 3O₂ → 2CO₂ + 3H₂O
- 6. D · Carbon monoxide
- 7. C · 40 °C
- 8. C · 80%
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