护理入学考试化学练习卷（附答案）

免费可打印的护理入学考试化学练习卷：8 道题，从简单到考试水平，附答案。可打印或另存为 PDF。

新练习卷在线练习，附提示

教师请注意： 可免费打印、复印并在课堂上使用。每份新练习题都有新的数值和独立的答案。欢迎在课程页面添加指向 ExamProblems 的链接。

姓名: ____________________   日期: ____________

1.简单

What is the half-life of a radioactive isotope?

  1. AHalf the time it takes for all the atoms to decay
  2. BHalf the number of protons in the nucleus
  3. CThe time taken for the mass of a sample to double in size
  4. DThe time taken for half of the radioactive atoms in a sample to decay
2.简单

反应 AB → A + B 表示哪种类型的反应？

  1. A分解反应
  2. B复分解反应
  3. C合成反应
  4. D中和反应
3.简单

What is a single covalent bond?

  1. ATwo pairs of electrons shared between two atoms
  2. BOne pair of electrons shared between two atoms
  3. CThe attraction between two oppositely charged ions
  4. DOne electron transferred from one atom to another
4.中等

How does electronegativity change going down a group?

  1. AIt increases
  2. BIt decreases
  3. CIt doubles with each period
  4. DIt stays the same
5.中等

According to the Brønsted–Lowry definition, what is an acid?

  1. AA proton (H⁺) acceptor
  2. BA hydroxide ion donor
  3. CA proton (H⁺) donor
  4. DAn electron pair donor
6.中等

Oxygen has 8 electrons. What is its electron configuration?

  1. A1s² 2s² 2p⁴
  2. B1s² 2p⁶
  3. C1s² 2s⁶
  4. D1s² 2s² 2p⁶
7.困难

Hydrogen peroxide fizzes when poured on a cut because an enzyme in blood breaks it down. What gas is produced, and what type of reaction is it?

  1. AChlorine, in a synthesis reaction
  2. BHydrogen, in a single replacement reaction
  3. COxygen, in a decomposition reaction
  4. DCarbon dioxide, in a combustion reaction
8.困难

Ethanol (CH₃CH₂OH) and dimethyl ether (CH₃OCH₃) have the same formula, C₂H₆O, but ethanol boils at a much higher temperature. Why?

  1. AEthanol has an O–H group, so its molecules form hydrogen bonds with each other
  2. BDimethyl ether is ionic and ethanol is covalent
  3. CEthanol has more carbon atoms
  4. DEthanol molecules are heavier than dimethyl ether molecules

答案

  1. 1. D · The time taken for half of the radioactive atoms in a sample to decay
  2. 2. A · 分解反应
  3. 3. B · One pair of electrons shared between two atoms
  4. 4. B · It decreases
  5. 5. C · A proton (H⁺) donor
  6. 6. A · 1s² 2s² 2p⁴
  7. 7. C · Oxygen, in a decomposition reaction
  8. 8. A · Ethanol has an O–H group, so its molecules form hydrogen bonds with each other

完整分步解答：请在 examproblems.com 上练习本主题。