Chemia na egzaminy wstępne na pielęgniarstwo: karta pracy z odpowiedziami

What is absolute zero?

1. A0 °C, the point at which pure water freezes into ice
2. B0 °F, the temperature of a salt and ice mixture
3. C0 K, about −273 °C, the lowest possible temperature
4. D−100 °C, the coldest temperature on Earth

Jak nazywa się przejście z cieczy w gaz?

1. AParowanie (odparowanie)
2. BKrzepnięcie
3. CTopnienie
4. DSkraplanie

Która z poniższych zmian jest zmianą chemiczną?

1. ASpalanie drewna
2. BTłuczenie szkła
3. CRozpuszczanie cukru w herbacie
4. DTopnienie lodu

A red blood cell is placed in a concentrated (hypertonic) salt solution. What happens?

1. AWater enters the cell, which swells and may burst
2. BThe cell stays the same size and shape
3. CSalt leaves the cell, which swells
4. DWater leaves the cell, which shrinks

Jaki jest układ elektronów w atomie sodu (11 elektronów)?

1. A8, 2, 1
2. B2, 8, 1
3. C2, 8, 2
4. D2, 9

What is the oxidation number of oxygen in most of its compounds?

1. A0
2. B−1
3. C+2
4. D−2

Hydrogen is usually placed at the top of group 1. Which statement about hydrogen is correct?

1. AIt has a full outer shell like the noble gases
2. BIt has one valence electron like group 1 metals, but it is a nonmetal gas
3. CIt is an alkali metal that is solid at room temperature
4. DIt always forms H⁺ ions and never shares electrons

Which of these is a redox reaction?

1. ACaCO₃ → CaO + CO₂
2. BZn + CuSO₄ → ZnSO₄ + Cu
3. CNaOH + HCl → NaCl + H₂O
4. DAgNO₃ + NaCl → AgCl + NaNO₃