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

Which unit is commonly used for the density of a liquid?

1. Ag·mL
2. BmL/g
3. Cg/mL
4. Dkg

What is an electrolyte?

1. AA metal that conducts electricity as a solid
2. BA gas that dissolves in blood
3. CA substance that dissolves as whole molecules without forming any ions
4. DA substance that forms ions and conducts electricity when dissolved in water

What is the maximum number of electrons the first electron shell can hold?

1. A1
2. B18
3. C2
4. D8

Nhiệt độ cao hơn thường ảnh hưởng thế nào đến lượng chất rắn hòa tan trong nước?

1. AHòa tan được ít chất rắn hơn
2. BChất rắn biến thành chất khí
3. CKhông ảnh hưởng đến chất rắn
4. DHòa tan được nhiều chất rắn hơn

An exothermic reaction is at equilibrium. What happens if the temperature is raised?

1. AThe reaction becomes endothermic
2. BThe equilibrium does not change
3. CThe equilibrium shifts toward the products, raising the yield
4. DThe equilibrium shifts toward the reactants

What is the molar mass of sulfuric acid, H₂SO₄ (H = 1, S = 32, O = 16 g/mol)?

1. A49 g/mol
2. B96 g/mol
3. C98 g/mol
4. D50 g/mol

A catalyst is added to an exothermic reaction. How does the energy diagram change?

1. AThe reaction becomes endothermic
2. BThe reactants start at a higher energy
3. CThe products end up at a lower energy, so more heat is released
4. DThe peak is lower, but the energy of reactants and products stays the same

In the reaction NaCl(aq) + AgNO₃(aq) → AgCl(s) + NaNO₃(aq), which ions are spectator ions?

1. ANa⁺ and Cl⁻
2. BNa⁺ and NO₃⁻
3. CAg⁺ and Cl⁻
4. DAg⁺ and NO₃⁻