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

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1.Лёгкая

According to the kinetic molecular theory, how do gas particles move?

  1. ASlowly in fixed positions
  2. BAlways in a single direction, set by the pull of gravity
  3. COnly when heated, and then in neat lines between the walls
  4. DConstantly, randomly and in straight lines between collisions
2.Лёгкая

What is an unsaturated solution?

  1. AA solution that holds the maximum possible solute
  2. BA solution that can still dissolve more solute
  3. CA solution with undissolved solid at the bottom
  4. DA solution with no solute at all
3.Лёгкая

Что из перечисленного является химическим изменением?

  1. AРастворение сахара в чае
  2. BГорение дерева
  3. CРазбивание стекла
  4. DТаяние льда
4.Средняя

Water has a high specific heat capacity. How does this help the human body?

  1. AIt makes the blood more acidic
  2. BIt makes water a poor solvent for salts
  3. CIt helps keep body temperature stable
  4. DIt allows oxygen to dissolve in water more easily
5.Средняя

A plastic block has a density of 0,8 g/cm³. What happens when it is placed in water (density 1,0 g/cm³)?

  1. AIt sinks
  2. BIt floats
  3. CIt dissolves
  4. DIt stays suspended halfway down
6.Средняя

Which nuclear process powers the Sun?

  1. ACombustion of hydrogen gas with oxygen in its core
  2. BFusion of hydrogen nuclei to form helium
  3. CAlpha decay of helium
  4. DFission of uranium into smaller nuclei
7.Сложная

Why is incomplete combustion of fuel in a poorly ventilated room dangerous?

  1. AIt produces carbon monoxide, which binds to haemoglobin and blocks oxygen transport
  2. BIt produces water vapour, which is toxic
  3. CIt produces nitrogen, which replaces oxygen in the blood
  4. DIt produces extra oxygen, which damages the lining of the lungs over time
8.Сложная

A solution of acetic acid conducts electricity only weakly, while hydrochloric acid of the same concentration conducts strongly. Why?

  1. AAcetic acid forms more ions than hydrochloric acid does
  2. BAcetic acid does not dissolve in water at all
  3. CAcetic acid only partly ionises, so it forms fewer ions
  4. DHydrochloric acid contains metal atoms

Ответы

  1. 1. D · Constantly, randomly and in straight lines between collisions
  2. 2. B · A solution that can still dissolve more solute
  3. 3. B · Горение дерева
  4. 4. C · It helps keep body temperature stable
  5. 5. B · It floats
  6. 6. B · Fusion of hydrogen nuclei to form helium
  7. 7. A · It produces carbon monoxide, which binds to haemoglobin and blocks oxygen transport
  8. 8. C · Acetic acid only partly ionises, so it forms fewer ions

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