Werkblad Scheikunde voor toelatingsexamens verpleegkunde met antwoorden

Wat is het chemische symbool van natrium?

1. AS
2. BNa
3. CSo
4. DN

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

1. AGas
2. BPlasma
3. CVast
4. DVloeibaar

What is the SI base unit of mass?

1. ANewton
2. BPound
3. CGram
4. DKilogram

How many lone (non-bonding) pairs of electrons are on the oxygen atom in a water molecule?

1. A1
2. B2
3. C4
4. D0

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

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

Which is larger, a sodium atom (Na) or a sodium ion (Na⁺)?

1. AThe sodium atom
2. BThey are the same size
3. CIt depends on the temperature
4. DThe sodium ion

Why is gamma radiation used to sterilise sealed medical supplies such as syringes?

1. AIt passes through the packaging and kills microbes without making the items radioactive
2. BIt adds a protective chemical coating to the items
3. CIt heats the items to very high temperatures, so the microbes are burned away inside the pack
4. DIt is stopped by the packaging, so it only cleans the outside

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