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

Which group contains the alkaline earth metals, such as magnesium and calcium?

1. AGroup 18
2. BGroup 1
3. CGroup 2
4. DGroup 17

What is osmosis?

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

Which positive ion is found in the highest concentration inside most body cells?

1. APotassium (K⁺)
2. BCalcium (Ca²⁺)
3. CMagnesium (Mg²⁺)
4. DSodium (Na⁺)

What is a polymer?

1. AAn ion with more than one charge
2. BA large molecule built from many repeating smaller units called monomers
3. CA small molecule containing only two atoms of one element
4. DA mixture of several different elements

Which element has the most metallic character?

1. AChlorine (Cl)
2. BCaesium (Cs)
3. CAluminium (Al)
4. DSodium (Na)

Какое свойство типично для ионных соединений, таких как NaCl?

1. AПроводимость электричества в виде сухих твёрдых веществ
2. BВысокие температуры плавления; в растворе проводят ток
3. CМягкость и лёгкая изгибаемость, как у металлов
4. DНизкие температуры плавления и газообразное состояние при комнатной температуре

Hyperbaric oxygen therapy places a patient in a chamber with oxygen at higher than normal pressure. Why does this raise the oxygen dissolved in blood plasma?

1. AHigher pressure lowers body temperature, so the blood can hold much more gas
2. BHigher pressure turns the oxygen into a liquid
3. CGas solubility in a liquid increases with the partial pressure of the gas
4. DHigher pressure makes red blood cells divide faster

Сколько граммов NaOH (молярная масса 40 г/моль) нужно для приготовления 500 мл 0,2 М раствора?

1. A40 г
2. B8 г
3. C0,1 г
4. D4 г