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

What is an alloy?

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

According to collision theory, what must happen for particles to react?

1. AThey must stay completely still next to each other
2. BThey must collide with enough energy and the right orientation
3. CThey must both be in the solid state at the same time
4. DThey must have the same mass

What is plasma, as a state of matter?

1. AA liquid that has been cooled below its freezing point
2. BA solid that conducts electricity
3. CThe liquid part of blood
4. DA very hot gas in which atoms have lost electrons and become ions

Hợp chất nào được tạo thành giữa calcium (Ca²⁺) và chlorine (Cl⁻)?

1. ACa₂Cl₃
2. BCaCl
3. CCaCl₂
4. DCa₂Cl

Why does oxygen move from the alveoli of the lungs into the blood?

1. AThe partial pressure of oxygen is higher in the blood than in the alveoli
2. BOxygen is pumped actively into the blood
3. CThe partial pressure of oxygen is higher in the alveoli than in the blood
4. DOxygen is heavier than carbon dioxide

Điện tích của ion chloride là bao nhiêu?

1. A+1
2. B−2
3. C+7
4. D−1

For N₂ + 3H₂ → 2NH₃, 1 mol of N₂ is mixed with 2 mol of H₂. Which reactant is limiting?

1. AH₂, because 1 mol of N₂ would need 3 mol of H₂
2. BNeither, because both are used up exactly
3. CN₂, because there is less of it
4. DNH₃, because it is the product

In the Bohr model, what happens when an electron drops from a higher energy level to a lower one?

1. AEnergy is released, often as light
2. BThe atom gains a proton
3. CThe electron leaves the atom
4. DEnergy is absorbed from the surroundings