Werkblad Scheikunde voor toelatingsexamens verpleegkunde met antwoorden

Hoe heet de overgang van een vaste stof direct naar een gas?

1. ASmelten
2. BSublimatie
3. CCondensatie
4. DRijpvorming (desublimatie)

Wat ontstaat er wanneer een zuur en een base elkaar neutraliseren?

1. AEen zout en water
2. BEen metaal en waterstofgas
3. CAlleen koolstofdioxide
4. DEen sterker zuur

Which three elements make up carbohydrates?

1. ACarbon, hydrogen and oxygen
2. BCarbon, hydrogen and nitrogen
3. CHydrogen, nitrogen and phosphorus
4. DCarbon, nitrogen and sulfur

For the gas reaction N₂ + 3H₂ ⇌ 2NH₃, what is the effect of increasing the pressure?

1. AThere is no effect on the equilibrium
2. BThe equilibrium shifts to the right, toward NH₃
3. CThe equilibrium shifts to the left, toward N₂ and H₂
4. DThe NH₃ breaks down completely

Why does keeping food in a refrigerator slow down spoilage?

1. ALower temperatures slow down chemical and microbial reactions
2. BCold temperatures add preservatives to the food
3. CLower temperatures raise the activation energy of every reaction
4. DCold air contains no oxygen

How should the volume of water in a graduated cylinder be read?

1. AFrom above the cylinder, at the top edge of the curved surface
2. BAt any angle, from the middle of the cylinder
3. CFrom below, at the highest point the water touches the glass
4. DAt eye level, from the bottom of the curved surface (meniscus)

Magnesium burns as 2Mg + O₂ → 2MgO. What mass of MgO (40 g/mol) forms from 48 g of Mg (24 g/mol)?

1. A48 g
2. B160 g
3. C80 g
4. D40 g

An isotope has a half-life of 8 days. How long does it take for 100 g to decay to 12,5 g?

1. A32 days
2. B24 days
3. C64 days
4. D16 days