Werkblad Scheikunde voor toelatingsexamens verpleegkunde met antwoorden

Which group of biological molecules includes fats, oils and cholesterol?

1. ALipids
2. BCarbohydrates
3. CNucleic acids
4. DProteins

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

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

Which method separates sand from water?

1. AEvaporation of the sand
2. BChromatography
3. CFiltration
4. DDistillation

Hoeveel valentie-elektronen (elektronen in de buitenste schil) heeft een zuurstofatoom?

1. A8
2. B16
3. C2
4. D6

What is the molar mass of calcium carbonate, CaCO₃ (Ca = 40, C = 12, O = 16 g/mol)?

1. A100 g/mol
2. B68 g/mol
3. C116 g/mol
4. D84 g/mol

What is the oxidation number of an element in its uncombined (elemental) form, such as Fe or O₂?

1. A0
2. B−1
3. CIt equals the group number
4. D+1

CO₂ in blood forms carbonic acid: CO₂ + H₂O ⇌ H₂CO₃ ⇌ H⁺ + HCO₃⁻. An anxious patient hyperventilates and breathes off extra CO₂. What happens to blood pH?

1. AIt rises, because less CO₂ means fewer H⁺ ions
2. BIt falls, because oxygen is an acid
3. CIt stays exactly 7,40, because CO₂ does not affect pH
4. DIt falls, because less CO₂ means more H⁺ ions

Half-normal saline (0,45% NaCl) is compared with blood plasma, which has about the same concentration as 0,9% NaCl. How is 0,45% NaCl described, and what happens to red blood cells placed in it?

1. AHypertonic; water tends to move out of the cells, which shrink
2. BHypotonic; water tends to move into the cells, which swell
3. CHypertonic; salt moves into the cells, which then swell
4. DIsotonic; water moves equally in and out, so the cells keep their shape