Chemistry for nursing entrance exams worksheet with answers

What is the chemical symbol for sodium?

1. AS
2. BNa
3. CSo
4. DN

What is a single covalent bond?

1. AOne electron transferred from one atom to another
2. BThe attraction between two oppositely charged ions
3. CTwo pairs of electrons shared between two atoms
4. DOne pair of electrons shared between two atoms

In which state of matter do particles have a fixed shape and a fixed volume?

1. AGas
2. BLiquid
3. CSolid
4. DPlasma

Which element has chemical properties most similar to calcium?

1. AScandium
2. BMagnesium
3. CCarbon
4. DPotassium

What does Avogadro's law state?

1. AThe pressure of a gas doubles when its temperature is halved
2. BEqual volumes of gases at the same temperature and pressure contain equal numbers of molecules
3. COne mole of any gas has a mass of 22.4 g
4. DEqual masses of all gases contain equal numbers of molecules under any conditions

Which assumption is made about an ideal gas?

1. AIts particles lose energy in every collision
2. BIts particles have no attraction to each other
3. CIts particles are large, closely packed and strongly attracted
4. DIts particles stay still at room temperature

What is (8 × 10⁶) ÷ (2 × 10⁻²)?

1. A4 × 10⁴
2. B16 × 10⁴
3. C4 × 10⁸
4. D4 × 10⁻¹²

Methane burns as CH₄ + 2O₂ → CO₂ + 2H₂O. What mass of CO₂ (44 g/mol) forms from 16 g of CH₄ (16 g/mol)?

1. A16 g
2. B44 g
3. C22 g
4. D88 g