Chemistry for nursing entrance exams worksheet with answers

What is the melting point of a substance?

1. AThe temperature at which it catches fire
2. BThe temperature at which it dissolves in water
3. CThe temperature at which its solid turns into a liquid
4. DThe temperature at which its liquid turns into a gas

Which quantity is the same for 1 mole of any substance?

1. AThe number of particles
2. BThe volume as a liquid
3. CThe number of atoms per molecule
4. DThe mass in grams

What is a vertical column of the periodic table called?

1. AA period
2. BA shell
3. CA series
4. DA group

A reaction has ΔH = −890 kJ/mol. What does the negative sign tell you?

1. AThe reaction needs a catalyst
2. BThe reaction is at equilibrium
3. CThe reaction is endothermic
4. DThe reaction is exothermic

Which measurement has three significant figures?

1. A0.00560
2. B56
3. C0.0056
4. D5.0006

Which reacts more vigorously with water, potassium or sodium?

1. ASodium, because it has fewer electron shells to shield its electron
2. BSodium, because its outer electron is farther from the nucleus
3. CThey react equally, because both are in group 1
4. DPotassium, because its outer electron is farther from the nucleus

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. BThe reaction cannot reach equilibrium
3. CAt equilibrium, the mixture contains mostly reactants
4. DAt equilibrium, the mixture contains mostly products

J.J. Thomson's cathode ray experiments led to which discovery?

1. AAtoms contain small, negatively charged particles
2. BAtoms have a dense, positively charged nucleus
3. CElectrons occupy fixed energy levels
4. DThe nucleus contains uncharged neutrons