Werkblad Scheikunde voor toelatingsexamens verpleegkunde met antwoorden

What does the double arrow (⇌) in a chemical equation show?

1. AThe reaction releases heat
2. BThe reaction is reversible
3. CThe reaction is very fast
4. DThe reaction needs a catalyst

How many millilitres are in 1 litre?

1. A10,000
2. B10
3. C100
4. D1000

What is plasma, as a state of matter?

1. AA liquid that has been cooled below its freezing point
2. BA solid that conducts electricity
3. CThe liquid part of blood
4. DA very hot gas in which atoms have lost electrons and become ions

Which coefficients balance __KClO₃ → __KCl + __O₂?

1. A1, 1, 1
2. B1, 1, 3
3. C2, 2, 3
4. D2, 1, 3

What does Avogadro's law state?

1. AThe pressure of a gas doubles when its temperature is halved
2. BEqual masses of all gases contain equal numbers of molecules under any conditions
3. COne mole of any gas has a mass of 22,4 g
4. DEqual volumes of gases at the same temperature and pressure contain equal numbers of molecules

Why does oxygen move from the alveoli of the lungs into the blood?

1. AOxygen is pumped actively into the blood
2. BThe partial pressure of oxygen is higher in the blood than in the alveoli
3. CThe partial pressure of oxygen is higher in the alveoli than in the blood
4. DOxygen is heavier than carbon dioxide

Marble chips react with hydrochloric acid, giving off CO₂. The gas is produced quickly at first, then more and more slowly. Why does the rate fall?

1. AThe products act as a catalyst that slows the reaction down
2. BThe activation energy steadily increases as the reaction goes on
3. CThe acid concentration falls as it is used up, so collisions become less frequent
4. DThe CO₂ produced turns back into acid

Zinc reacts as Zn + 2HCl → ZnCl₂ + H₂. What mass of zinc (65 g/mol) reacts completely with 50 mL of 2 M HCl?

1. A65 g
2. B3,25 g
3. C1,63 g
4. D6,5 g