Werkblad Scheikunde voor toelatingsexamens verpleegkunde met antwoorden

Welke van deze is een chemische verandering?

1. ASuiker die oplost in thee
2. BHout dat brandt
3. CGlas dat breekt
4. DIJs dat smelt

What is the name of the polyatomic ion NH₄⁺?

1. AAmmonium
2. BNitrate
3. CAmmonia
4. DNitride

What is the half-life of a radioactive isotope?

1. AHalf the time it takes for all the atoms to decay
2. BThe time taken for half of the radioactive atoms in a sample 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

Why must temperatures be in kelvin in gas law calculations?

1. AThe kelvin scale has smaller degrees, which gives more precise answers
2. BKelvin values are always below 100
3. CCelsius can only be used for liquids
4. DGas volume and pressure are proportional to the absolute temperature

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

1. AAt eye level, from the bottom of the curved surface (meniscus)
2. BFrom above the cylinder, at the top edge of the curved surface
3. CAt any angle, from the middle of the cylinder
4. DFrom below, at the highest point the water touches the glass

In a closed container, 10 g of substance A reacts completely with 5 g of substance B. What is the total mass of the products?

1. A10 g
2. B15 g
3. C50 g
4. D5 g

An element has the electron arrangement 2, 8, 8, 2. Where is it on the periodic table?

1. AGroup 4, period 2
2. BGroup 2, period 4
3. CGroup 2, period 2
4. DGroup 8, period 2

A reaction at equilibrium has a very large equilibrium constant (K much greater than 1). What does this tell you?

1. AThe reaction is very fast
2. BAt equilibrium, the mixture contains mostly products
3. CAt equilibrium, the mixture contains mostly reactants
4. DThe reaction cannot reach equilibrium