Chemistry for nursing entrance exams worksheet with answers

Elements in the same period of the periodic table have the same number of what?

1. ANeutrons
2. BValence electrons
3. COccupied electron shells
4. DProtons

In a salt solution, what is the salt called?

1. AThe precipitate
2. BThe catalyst
3. CThe solvent
4. DThe solute

A blown-up balloon is put in a freezer. What happens to its volume?

1. AIt stays exactly the same
2. BIt increases
3. CThe balloon bursts
4. DIt decreases

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

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

Which nuclear process powers the Sun?

1. AAlpha decay of helium
2. BCombustion of hydrogen gas with oxygen in its core
3. CFission of uranium into smaller nuclei
4. DFusion of hydrogen nuclei to form helium

To which family of organic compounds does ethanol, C₂H₅OH, belong?

1. AAlkanes
2. BEsters
3. CAlcohols
4. DCarboxylic acids

A liquid has a density of 1.2 g/mL. What is the mass of 250 mL of this liquid?

1. A30 g
2. B251.2 g
3. C208 g
4. D300 g

Blood is kept near pH 7.4 by a buffer. If extra acid (H⁺) enters the blood, what does the bicarbonate ion (HCO₃⁻) do?

1. AIt raises the pH to 14
2. BIt turns into sodium chloride
3. CIt binds the H⁺ as carbonic acid, so the pH drops only a little
4. DIt releases more H⁺ ions of its own, making the blood even more acidic