Werkblad Scheikunde voor toelatingsexamens verpleegkunde met antwoorden

How does increasing the concentration of a reactant in solution usually affect the reaction rate?

1. AThe rate increases
2. BThe rate decreases
3. CThe reaction stops
4. DThe rate stays the same

Where do the mole ratios used in stoichiometry come from?

1. AThe subscripts in each formula
2. BThe physical states of the substances
3. CThe coefficients of the balanced equation
4. DThe molar masses of the reactants

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

1. APlasma
2. BGas
3. CVloeibaar
4. DVast

Water can act as an acid in some reactions and as a base in others. What is such a substance called?

1. ASaturated
2. BAmphoteric
3. CIsotonic
4. DNeutral

In the ideal gas law, PV = nRT, what does n stand for?

1. AThe density of the gas
2. BThe number of moles of gas
3. CThe number of atoms per molecule
4. DThe number of molecules of gas

Why does keeping food in a refrigerator slow down spoilage?

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

Welke lijst zet de elementen in volgorde van toenemende atoomstraal?

1. ANa, Mg, Al, Si
2. BC, N, O, F
3. CO, F, N, C
4. DF, O, N, C

Why is Dmitri Mendeleev's early periodic table regarded as such a success?

1. AHe left gaps and correctly predicted the properties of elements not yet discovered
2. BHe proved that the atoms of every element contain electrons
3. CHe discovered the noble gases and placed them in group 18
4. DHe arranged the elements by atomic number, which he had discovered