Phiếu bài tập Hóa học cho kỳ thi đầu vào điều dưỡng có đáp án

Between which kinds of elements do ionic bonds usually form?

1. ATwo noble gases
2. BA metal and a nonmetal
3. CTwo nonmetals
4. DTwo identical metals

Sodium và potassium thuộc nhóm nào?

1. AHalogen (nhóm 17)
2. BKhí hiếm (nhóm 18)
3. CKim loại kiềm (nhóm 1)
4. DKim loại kiềm thổ (nhóm 2)

What are the building blocks of carbohydrates such as starch?

1. AMonosaccharides (simple sugars) such as glucose
2. BNucleotides
3. CFatty acids joined to a glycerol molecule
4. DAmino acids

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

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

In a closed container, 10 g of substance A reacts completely with 5 g of substance B. What is the total mass of the products?

1. A10 g
2. B50 g
3. C15 g
4. D5 g

What is the molar mass of calcium carbonate, CaCO₃ (Ca = 40, C = 12, O = 16 g/mol)?

1. A100 g/mol
2. B84 g/mol
3. C116 g/mol
4. D68 g/mol

Samples of hydrogen gas (H₂) and oxygen gas (O₂) are at the same temperature. Which statement is correct?

1. ABoth move at the same average speed
2. BO₂ molecules move faster because they are heavier
3. CThey have the same average kinetic energy, but H₂ molecules move faster
4. DH₂ molecules have more kinetic energy and move faster

Một dung dịch có nồng độ ion hydrogen là 1 × 10⁻⁹ mol/L. pH của nó là bao nhiêu, và nó có tính acid hay base?

1. ApH 5, acid
2. BpH 9, acid
3. CpH 9, base
4. DpH −9, acid