Робочий аркуш «Хімія для вступних іспитів на медсестринство» з відповідями

Безкоштовний робочий аркуш для друку «Хімія для вступних іспитів на медсестринство»: 8 задач від легких до рівня іспиту, з ключем відповідей. Роздрукуйте його або збережіть як PDF.

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Ім’я: ____________________   Дата: ____________

1.Легка

What does the rate of a reaction measure?

  1. AHow much energy the final products contain
  2. BHow much product forms in total by the end
  3. CHow hot the reaction gets
  4. DHow quickly reactants are used up or products are formed
2.Легка

Which is a sign that a chemical reaction may have taken place?

  1. AA block of wax melts when it is heated
  2. BWater freezes into ice when put in a freezer
  3. CSugar dissolves completely when stirred into water
  4. DA gas is produced when two liquids are mixed
3.Легка

A cleaning solution has a pH of 12. How is it described?

  1. AWeakly acidic
  2. BStrongly acidic
  3. CStrongly basic
  4. DNeutral
4.Середня

Which reacts more vigorously with water, potassium or sodium?

  1. ASodium, because its outer electron is farther from the nucleus
  2. BSodium, because it has fewer electron shells to shield its electron
  3. CPotassium, because its outer electron is farther from the nucleus
  4. DThey react equally, because both are in group 1
5.Середня

Which equation shows a combustion reaction?

  1. ACaCO₃ → CaO + CO₂
  2. BNaOH + HCl → NaCl + H₂O
  3. CC₂H₅OH + 3O₂ → 2CO₂ + 3H₂O
  4. DZn + CuSO₄ → ZnSO₄ + Cu
6.Середня

Water climbs up a narrow glass tube. Which property mainly causes this?

  1. AAdhesion of water to the glass
  2. BLow density of water
  3. CEvaporation of water from the tube
  4. DWater's high boiling point
7.Складна

Cells oxidise glucose to CO₂ and water, as burning glucose does. How does cellular respiration differ from burning?

  1. AIt releases the energy in many small, enzyme-controlled steps
  2. BIt produces different products from burning
  3. CIt does not need oxygen at any stage
  4. DIt releases much more total energy than burning the same glucose
8.Складна

A small amount of acid is spilled on a lab bench. Why is a weak base such as sodium bicarbonate preferred over strong NaOH to neutralise it?

  1. ASodium bicarbonate makes the spilled acid evaporate
  2. BSodium bicarbonate is a strong acid that cancels the spill
  3. CNaOH does not react with acids at room temperature
  4. DExcess sodium bicarbonate is far less harmful than excess NaOH

Ключ відповідей

  1. 1. D · How quickly reactants are used up or products are formed
  2. 2. D · A gas is produced when two liquids are mixed
  3. 3. C · Strongly basic
  4. 4. C · Potassium, because its outer electron is farther from the nucleus
  5. 5. C · C₂H₅OH + 3O₂ → 2CO₂ + 3H₂O
  6. 6. A · Adhesion of water to the glass
  7. 7. A · It releases the energy in many small, enzyme-controlled steps
  8. 8. D · Excess sodium bicarbonate is far less harmful than excess NaOH

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