Lembaran kerja Kimia untuk peperiksaan kemasukan kejururawatan dengan jawapan

What does the octet rule state?

1. AEvery stable atom has exactly 8 protons in its nucleus
2. BAn atom can form a maximum of 8 covalent bonds
3. CEvery stable molecule contains exactly 8 atoms
4. DAtoms tend to gain, lose or share electrons to get 8 outer electrons

How many moles of oxygen atoms are in 1 mole of carbon dioxide, CO₂?

1. A1
2. B2
3. C0.5
4. D3

Yang manakah ialah perubahan kimia?

1. AKayu terbakar
2. BGula larut dalam teh
3. CAis mencair
4. DKaca pecah

Atom magnesium kehilangan dua elektron. Apakah ion yang terbentuk?

1. AMg⁺
2. BMg²⁻
3. CMg²⁺
4. DMg⁻

How does dissolving salt in water affect the water's boiling point?

1. AIt makes the water boil at room temperature
2. BIt has no effect on the boiling point
3. CIt lowers the boiling point slightly
4. DIt raises the boiling point slightly

Mengapakah gas adi jarang bertindak balas?

1. AIa tidak mempunyai elektron langsung
2. BPetala elektron luarnya sudah penuh
3. CSemuanya radioaktif
4. DAtomnya jauh lebih besar daripada atom lain

A scuba diver breathes compressed air deep underwater. Why must the diver breathe out while swimming up to the surface?

1. AThe air in the lungs expands as the outside pressure falls
2. BThe air in the lungs shrinks as the outside pressure falls
3. COxygen turns to liquid at the surface
4. DThe water gets warmer near the surface

Olive oil is liquid at room temperature, while butter is solid. Which explanation is correct?

1. AOlive oil molecules are ionic, while butter molecules are covalent
2. BOlive oil has more C=C double bonds, which kink the chains so they cannot pack closely
3. CButter contains more water, which freezes at room temperature
4. DOlive oil has no C=C double bonds, so its chains stay straight and pack tightly