Werkblad Scheikunde voor toelatingsexamens verpleegkunde met antwoorden

Which two substances must be present for iron to rust?

1. AHydrogen and oxygen gas only
2. BOxygen and water
3. CCarbon dioxide and salt
4. DNitrogen and water

In welke aggregatietoestand hebben deeltjes een vaste vorm en een vast volume?

1. AVloeibaar
2. BVast
3. CGas
4. DPlasma

A food Calorie (written with a capital C) equals which amount of energy?

1. A1 kilocalorie
2. B1 kilojoule (1000 J)
3. C1 calorie
4. D1 joule

During digestion, large molecules are broken down by adding water across their bonds. What is this reaction called?

1. ACombustion
2. BPolymerisation
3. CCondensation
4. DHydrolysis

Welke coëfficiënten maken de vergelijking __H₂ + __O₂ → __H₂O kloppend?

1. A2, 1, 2
2. B2, 2, 2
3. C1, 2, 1
4. D1, 1, 1

Nitric acid (HNO₃) reacts with potassium hydroxide (KOH). Which salt forms?

1. ANitrogen hydroxide, NOH
2. BPotassium hydride, KH
3. CPotassium nitrite, KNO₂
4. DPotassium nitrate, KNO₃

Olive oil is liquid at room temperature, while butter is solid. Which explanation is correct?

1. AButter contains more water, which freezes at room temperature
2. BOlive oil has no C=C double bonds, so its chains stay straight and pack tightly
3. COlive oil molecules are ionic, while butter molecules are covalent
4. DOlive oil has more C=C double bonds, which kink the chains so they cannot pack closely

Alpha radiation is stopped by skin, yet an alpha source is very dangerous if swallowed or inhaled. Why?

1. AInside the body, alpha particles deposit all their energy in nearby living cells
2. BAlpha particles are only produced at body temperature
3. CAlpha particles turn into much more penetrating gamma rays once inside the body
4. DStomach acid makes the alpha source more radioactive