Chemistry for nursing entrance exams worksheet with answers

Which subatomic particles are found in the nucleus?

1. AElectrons only
2. BProtons and neutrons
3. CProtons and electrons
4. DElectrons and neutrons

In a chemical equation, what are the reactants?

1. AThe catalysts written above the arrow
2. BThe numbers written in front of each formula
3. CThe starting substances, written to the left of the arrow
4. DThe new substances formed, written to the right of the arrow

What does the prefix "milli-" mean?

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

What is nuclear fission?

1. AThe joining of two light nuclei to form a heavier nucleus
2. BThe splitting of a heavy nucleus into smaller nuclei
3. CThe burning of uranium in oxygen
4. DThe loss of electrons from an atom

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

1. AAmphoteric
2. BSaturated
3. CNeutral
4. DIsotonic

What is the molar mass of sodium chloride, NaCl (Na = 23, Cl = 35.5 g/mol)?

1. A23 g/mol
2. B81.5 g/mol
3. C12.5 g/mol
4. D58.5 g/mol

100 mL of 1 M NaCl is mixed with 100 mL of 3 M NaCl. What is the concentration of the mixture?

1. A1.5 M
2. B3 M
3. C4 M
4. D2 M

Why is incomplete combustion of fuel in a poorly ventilated room dangerous?

1. AIt produces nitrogen, which replaces oxygen in the blood
2. BIt produces extra oxygen, which damages the lining of the lungs over time
3. CIt produces water vapour, which is toxic
4. DIt produces carbon monoxide, which binds to haemoglobin and blocks oxygen transport