Chemia na egzaminy wstępne na pielęgniarstwo: karta pracy z odpowiedziami

What are the usual units of molar mass?

1. Amol/L
2. Bg/L
3. Cg/mol
4. Dmol/g

What is activation energy?

1. AThe energy stored in the products
2. BThe minimum energy reacting particles need for a reaction to happen
3. CThe total energy released once the reaction has finished
4. DThe energy needed to melt a solid

What is the SI unit of temperature?

1. AJoule
2. BKelvin
3. CDegree Celsius
4. DDegree Fahrenheit

What is nuclear fission?

1. AThe joining of two light nuclei to form a heavier nucleus
2. BThe burning of uranium in oxygen
3. CThe splitting of a heavy nucleus into smaller nuclei
4. DThe loss of electrons from an atom

How many covalent bonds does a carbon atom usually form?

1. A3
2. B4
3. C1
4. D2

Which assumption is made about an ideal gas?

1. AIts particles stay still at room temperature
2. BIts particles have no attraction to each other
3. CIts particles lose energy in every collision
4. DIts particles are large, closely packed and strongly attracted

Which of these is a redox reaction?

1. ACaCO₃ → CaO + CO₂
2. BZn + CuSO₄ → ZnSO₄ + Cu
3. CAgNO₃ + NaCl → AgCl + NaNO₃
4. DNaOH + HCl → NaCl + H₂O

Why is gamma radiation used to sterilise sealed medical supplies such as syringes?

1. AIt is stopped by the packaging, so it only cleans the outside
2. BIt adds a protective chemical coating to the items
3. CIt passes through the packaging and kills microbes without making the items radioactive
4. DIt heats the items to very high temperatures, so the microbes are burned away inside the pack