Chemistry for nursing entrance exams worksheet with answers

Which type of bond forms when electrons are shared between atoms?

1. AA metallic bond
2. BA nuclear bond
3. CAn ionic bond
4. DA covalent bond

According to the kinetic molecular theory, how do gas particles move?

1. ASlowly in fixed positions
2. BOnly when heated, and then in neat lines between the walls
3. CConstantly, randomly and in straight lines between collisions
4. DAlways in a single direction, set by the pull of gravity

What are the units of molarity?

1. AGrams of solute per 100 g of solution
2. BGrams of solute per litre of solution (g/L)
3. CMoles of solute per kilogram of the solvent used
4. DMoles of solute per litre of solution (mol/L)

How much heat is needed to raise the temperature of 100 g of water by 10 °C (specific heat of water = 4.18 J/g·°C)?

1. A418 J
2. B4180 J
3. C41.8 J
4. D41,800 J

Which statement describes an endothermic process?

1. AIt neither absorbs nor releases any energy
2. BIt releases heat, so the surroundings feel warmer
3. CIt absorbs heat, so the surroundings feel colder
4. DIt happens only at very high temperatures

What is the molar mass of sulfuric acid, H₂SO₄ (H = 1, S = 32, O = 16 g/mol)?

1. A49 g/mol
2. B98 g/mol
3. C50 g/mol
4. D96 g/mol

An element in period 3 forms an oxide with the formula X₂O₃. Which element is X?

1. ASodium
2. BMagnesium
3. CAluminium
4. DPhosphorus

Samples of hydrogen gas (H₂) and oxygen gas (O₂) are at the same temperature. Which statement is correct?

1. AH₂ molecules have more kinetic energy and move faster
2. BO₂ molecules move faster because they are heavier
3. CThey have the same average kinetic energy, but H₂ molecules move faster
4. DBoth move at the same average speed