Химия для вступительных экзаменов на сестринские программы: лист заданий с ответами

Какая частица атома почти не имеет массы по сравнению с остальными?

1. AЭлектрон
2. BНейтрон
3. CПротон
4. DЯдро в целом

What is osmosis?

1. AThe movement of solute particles against a gradient using energy
2. BThe breaking of a solid into ions
3. CThe dissolving of a gas in a liquid
4. DThe movement of water across a semipermeable membrane

Boyle's law describes the relationship between which two properties of a gas, at constant temperature?

1. APressure and volume
2. BVolume and temperature
3. CMass and volume
4. DPressure and temperature

Атом магния теряет два электрона. Какой ион образуется?

1. AMg²⁻
2. BMg⁺
3. CMg⁻
4. DMg²⁺

Potassium forms K⁺ ions and sulfur forms S²⁻ ions. What is the name and formula of their compound?

1. APotassium sulfide, K₂S
2. BPotassium sulfite, KS
3. CPotassium sulfate, K₂SO₄
4. DPotassium sulfide, KS₂

Какова формула оксида алюминия, состоящего из ионов Al³⁺ и O²⁻?

1. AAlO₃
2. BAlO
3. CAl₃O₂
4. DAl₂O₃

A catalyst is added to an exothermic reaction. How does the energy diagram change?

1. AThe peak is lower, but the energy of reactants and products stays the same
2. BThe reactants start at a higher energy
3. CThe reaction becomes endothermic
4. DThe products end up at a lower energy, so more heat is released

A piece of copper is placed in zinc sulfate solution. Zinc is more reactive than copper. What happens?

1. ANo reaction occurs
2. BHydrogen gas is produced
3. CCopper replaces zinc, forming copper sulfate
4. DZinc metal coats the copper and the solution turns blue