Робочий аркуш «Хімія для вступних іспитів на медсестринство» з відповідями

Яка властивість типова для металів?

1. AБільшість із них — гази за кімнатної температури
2. BВони крихкі тверді речовини, що розколюються
3. CВони погано проводять тепло
4. DВони добре проводять електричний струм

In a chemical equation, what does the symbol (aq) after a formula mean?

1. AA solid
2. BA pure liquid
3. CA gas
4. DDissolved in water

What is plasma, as a state of matter?

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

Magnesium forms Mg²⁺ ions and oxygen forms O²⁻ ions. What is the formula of magnesium oxide?

1. AMg₂O₂
2. BMgO₂
3. CMgO
4. DMg₂O

A patient's arterial blood pH is 7,25. How is this described?

1. ANeutral
2. BAlkalosis
3. CNormal
4. DAcidosis

Potassium forms K⁺ ions and sulfur forms S²⁻ ions. What is the name and formula of their compound?

1. APotassium sulfite, KS
2. BPotassium sulfide, K₂S
3. CPotassium sulfate, K₂SO₄
4. DPotassium sulfide, KS₂

Equal masses of sand and water sit in the sun and absorb the same amount of heat. Which warms up more, and why?

1. ASand, because it has a lower specific heat capacity than water
2. BWater, because it has a higher specific heat capacity than sand
3. CBoth warm equally, because they absorbed the same heat
4. DSand, because it has a higher specific heat capacity than water

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

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