Werkblad Scheikunde voor toelatingsexamens verpleegkunde met antwoorden

What is an acid–base indicator?

1. AA substance that neutralises every acid
2. BA device that measures temperature
3. CA substance that changes colour depending on pH
4. DA gas given off by acids

What does the prefix "milli-" mean?

1. AOne-thousandth (10⁻³)
2. BOne-hundredth (10⁻²)
3. COne thousand (10³)
4. DOne-millionth (10⁻⁶)

What is the half-life of a radioactive isotope?

1. AThe time taken for half of the radioactive atoms in a sample to decay
2. BHalf the time it takes for all the atoms to decay
3. CThe time taken for the mass of a sample to double in size
4. DHalf the number of protons in the nucleus

What is the conjugate base of nitric acid, HNO₃?

1. AH₂NO₃⁺
2. BHNO₂
3. CNO₂⁻
4. DNO₃⁻

Which assumption is made about an ideal gas?

1. AIts particles are large, closely packed and strongly attracted
2. BIts particles stay still at room temperature
3. CIts particles have no attraction to each other
4. DIts particles lose energy in every collision

Wat is de formule van aluminiumoxide, opgebouwd uit Al³⁺- en O²⁻-ionen?

1. AAl₃O₂
2. BAlO₃
3. CAlO
4. DAl₂O₃

Why does food cook faster in a pressure cooker?

1. AThe higher pressure lowers the boiling point
2. BThe higher pressure raises the boiling point, so the water is hotter
3. CPressure itself breaks down the food, regardless of temperature
4. DSteam is trapped, so the water boils at a lower temperature

Cells oxidise glucose to CO₂ and water, as burning glucose does. How does cellular respiration differ from burning?

1. AIt releases the energy in many small, enzyme-controlled steps
2. BIt does not need oxygen at any stage
3. CIt releases much more total energy than burning the same glucose
4. DIt produces different products from burning