Chemistry for nursing entrance exams worksheet with answers

Free printable Chemistry for nursing entrance exams worksheet: 8 problems from easy to exam level, with an answer key. Print it or save it as a PDF.

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1.Easy

According to collision theory, what must happen for particles to react?

  1. AThey must stay completely still next to each other
  2. BThey must both be in the solid state at the same time
  3. CThey must collide with enough energy and the right orientation
  4. DThey must have the same mass
2.Easy

An atom has 6 protons, 6 neutrons and 6 electrons. What is its mass number?

  1. A12
  2. B0
  3. C6
  4. D18
3.Easy

Which element exists naturally as diatomic molecules (two atoms joined together)?

  1. AOxygen
  2. BIron
  3. CHelium
  4. DSodium
4.Medium

What is the molar mass of sodium chloride, NaCl (Na = 23, Cl = 35.5 g/mol)?

  1. A58.5 g/mol
  2. B23 g/mol
  3. C81.5 g/mol
  4. D12.5 g/mol
5.Medium

How does a catalyst speed up a reaction?

  1. AIt raises the temperature of the reactants so they move faster
  2. BIt provides a different pathway with a lower activation energy
  3. CIt makes the reaction more exothermic
  4. DIt adds extra reactant to the mixture
6.Medium

How does dissolving salt in water affect the water's boiling point?

  1. AIt has no effect on the boiling point
  2. BIt makes the water boil at room temperature
  3. CIt raises the boiling point slightly
  4. DIt lowers the boiling point slightly
7.Hard

Why does salt sprinkled on an icy road help the ice melt?

  1. ASalt makes the ice denser so it sinks into the road
  2. BSalt reacts with ice and releases a lot of heat
  3. CSalt raises the freezing point of water
  4. DDissolved salt lowers the freezing point of water
8.Hard

A gas occupies 4 L at 2 atm and 200 K. What is its volume at 1 atm and 400 K?

  1. A16 L
  2. B4 L
  3. C1 L
  4. D8 L

Answer key

  1. 1. C · They must collide with enough energy and the right orientation
  2. 2. A · 12
  3. 3. A · Oxygen
  4. 4. A · 58.5 g/mol
  5. 5. B · It provides a different pathway with a lower activation energy
  6. 6. C · It raises the boiling point slightly
  7. 7. D · Dissolved salt lowers the freezing point of water
  8. 8. A · 16 L

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