Химия для вступительных экзаменов на сестринские программы: лист заданий с ответами

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1.Лёгкая

Which property is typical of nonmetals?

  1. AThey are poor conductors of heat and electricity
  2. BThey easily lose electrons to form positive ions
  3. CThey are shiny and easily bent into wires
  4. DThey are all solids at room temperature
2.Лёгкая

What is an alloy?

  1. AA compound formed when a metal reacts with oxygen
  2. BA mixture of a metal with one or more other elements
  3. CA nonmetal that conducts electricity
  4. DA pure metal in its natural state
3.Лёгкая

Что такое ион?

  1. AАтом, у которого в ядре больше нейтронов, чем у других атомов
  2. BМолекула из двух одинаковых атомов
  3. CЧастица без электронов
  4. DАтом или группа атомов с электрическим зарядом
4.Средняя

Why must temperatures be in kelvin in gas law calculations?

  1. AThe kelvin scale has smaller degrees, which gives more precise answers
  2. BGas volume and pressure are proportional to the absolute temperature
  3. CKelvin values are always below 100
  4. DCelsius can only be used for liquids
5.Средняя

Why does keeping food in a refrigerator slow down spoilage?

  1. ALower temperatures raise the activation energy of every reaction
  2. BCold air contains no oxygen
  3. CLower temperatures slow down chemical and microbial reactions
  4. DCold temperatures add preservatives to the food
6.Средняя

Which type of radiation can be stopped by a sheet of paper?

  1. AAlpha particles
  2. BGamma rays
  3. CX-rays
  4. DBeta particles (fast electrons)
7.Сложная

Samples of hydrogen gas (H₂) and oxygen gas (O₂) are at the same temperature. Which statement is correct?

  1. AThey have the same average kinetic energy, but H₂ molecules move faster
  2. BO₂ molecules move faster because they are heavier
  3. CH₂ molecules have more kinetic energy and move faster
  4. DBoth move at the same average speed
8.Сложная

How does soap help remove grease from skin?

  1. ASoap makes the grease more dense so it sinks
  2. BSoap molecules are completely nonpolar, so they dissolve grease like a solvent
  3. CEach soap molecule has a polar end that attracts water and a nonpolar end that attracts grease
  4. DSoap reacts with grease to form water and carbon dioxide

Ответы

  1. 1. A · They are poor conductors of heat and electricity
  2. 2. B · A mixture of a metal with one or more other elements
  3. 3. D · Атом или группа атомов с электрическим зарядом
  4. 4. B · Gas volume and pressure are proportional to the absolute temperature
  5. 5. C · Lower temperatures slow down chemical and microbial reactions
  6. 6. A · Alpha particles
  7. 7. A · They have the same average kinetic energy, but H₂ molecules move faster
  8. 8. C · Each soap molecule has a polar end that attracts water and a nonpolar end that attracts grease

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