Lembaran kerja Kimia untuk peperiksaan kemasukan kejururawatan dengan jawapan

What is activation energy?

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

What is the smallest particle of an element that still has the chemical properties of that element?

1. AA nucleus
2. BA proton
3. CAn electron
4. DAn atom

Elements in the same period of the periodic table have the same number of what?

1. AValence electrons
2. BProtons
3. COccupied electron shells
4. DNeutrons

What are isomers?

1. ACompounds with the same structure but different molecular formulas
2. BAtoms of the same element with different numbers of neutrons
3. CMolecules that contain the same number of bonds
4. DCompounds with the same molecular formula but different structures

Apakah yang dilakukan oleh larutan penimbal?

1. AIa mengekalkan suhu larutan malar
2. BIa mempercepat tindak balas peneutralan supaya pH cepat mencapai tepat 7
3. CIa menukarkan mana-mana asid menjadi bes kuat
4. DIa menentang perubahan pH apabila sedikit asid atau bes ditambah

Why does water boil at a lower temperature at the top of a high mountain?

1. AGravity is weaker, so the molecules escape more easily
2. BThe air pressure is lower, so less vapour pressure is needed to boil
3. CThere is less oxygen dissolved in the water up there
4. DThe air is colder, so the water loses heat and boils sooner

Suatu larutan mempunyai kepekatan ion hidrogen 1 × 10⁻⁹ mol/L. Apakah pHnya, dan adakah ia berasid atau bes?

1. ApH 5, berasid
2. BpH −9, berasid
3. CpH 9, berasid
4. DpH 9, bes

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 passes through the packaging and kills microbes without making the items radioactive
3. CIt heats the items to very high temperatures, so the microbes are burned away inside the pack
4. DIt adds a protective chemical coating to the items