Chemistry for nursing entrance exams worksheet with answers

What is an alpha particle made of?

1. A1 proton and 1 electron
2. BPure electromagnetic energy
3. C2 protons and 2 neutrons
4. DA single high-energy electron

What should a student always wear to protect the eyes when working with chemicals?

1. AContact lenses
2. BSunglasses
3. CReading glasses
4. DSafety goggles

What is the melting point of a substance?

1. AThe temperature at which its liquid turns into a gas
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 it catches fire

Drops of water form on the outside of a glass of ice water. Where does this water come from?

1. AThe ice evaporates through the glass
2. BWater vapour in the air condenses on the cold glass
3. CWater leaks through tiny holes in the glass
4. DThe glass releases water when it gets cold

How does a higher temperature usually affect how much of a solid dissolves in water?

1. AMore solid dissolves
2. BThe solid turns into a gas
3. CIt has no effect on solids
4. DLess solid dissolves

In 2KClO₃ → 2KCl + 3O₂, how many moles of O₂ form from 4 mol of KClO₃?

1. A8 mol
2. B3 mol
3. C4 mol
4. D6 mol

Hydrogen peroxide fizzes when poured on a cut because an enzyme in blood breaks it down. What gas is produced, and what type of reaction is it?

1. AOxygen, in a decomposition reaction
2. BChlorine, in a synthesis reaction
3. CHydrogen, in a single replacement reaction
4. DCarbon dioxide, in a combustion reaction

Which list puts fluorine, chlorine and bromine in order of increasing electronegativity?

1. ACl < Br < F
2. BBr < F < Cl
3. CBr < Cl < F
4. DF < Cl < Br