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

What is an unsaturated solution?

1. AA solution that can still dissolve more solute
2. BA solution with undissolved solid at the bottom
3. CA solution that holds the maximum possible solute
4. DA solution with no solute at all

Những hạt hạ nguyên tử nào có trong hạt nhân?

1. AElectron và neutron
2. BProton và neutron
3. CProton và electron
4. DChỉ electron

What is an alloy?

1. AA pure metal in its natural state
2. BA compound formed when a metal reacts with oxygen
3. CA nonmetal that conducts electricity
4. DA mixture of a metal with one or more other elements

What colour is phenolphthalein indicator in a basic solution?

1. AYellow
2. BBlue
3. CPink
4. DColourless

What is the oxidation number of sulfur in H₂SO₄?

1. A+2
2. B−2
3. C+4
4. D+6

A plastic block has a density of 0,8 g/cm³. What happens when it is placed in water (density 1,0 g/cm³)?

1. AIt dissolves
2. BIt sinks
3. CIt stays suspended halfway down
4. DIt floats

Liên kết nào phân cực mạnh nhất?

1. AH–H
2. BC–H
3. CCl–Cl
4. DH–F

Haemoglobin binds oxygen reversibly: Hb + O₂ ⇌ HbO₂. How does this equilibrium help deliver oxygen to tissues?

1. AThe equilibrium does not change anywhere in the body
2. BHigh O₂ in tissues shifts it to the left, absorbing oxygen
3. CLow O₂ in tissues shifts it to the right, releasing oxygen
4. DLow O₂ in tissues shifts it to the left, releasing oxygen