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

Which element exists naturally as diatomic molecules (two atoms joined together)?

1. ASodium
2. BIron
3. CHelium
4. DOxygen

What does the rate of a reaction measure?

1. AHow hot the reaction gets
2. BHow much product forms in total by the end
3. CHow much energy the final products contain
4. DHow quickly reactants are used up or products are formed

Where are the transition metals located on the periodic table?

1. AIn group 1 on the far left
2. BAbove the noble gases
3. CIn group 18 on the far right
4. DIn the central block, groups 3 to 12

On an energy diagram, the products are at a lower energy than the reactants. What kind of reaction is shown?

1. AEndothermic
2. BReversible only
3. CNuclear
4. DExothermic

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. COxygen is heavier than carbon dioxide
4. DThe partial pressure of oxygen is higher in the alveoli than in the blood

Яка молярна маса води (H = 1 g/mol, O = 16 g/mol)?

1. A10 g/mol
2. B32 g/mol
3. C18 g/mol
4. D17 g/mol

A salt is dissolved in water in an insulated cup, and the water temperature falls from 25 °C to 20 °C. Which statement is correct?

1. ANo energy change occurred, because the temperature fell
2. BDissolving is endothermic; the dissolving salt took heat from the water
3. CDissolving is endothermic; the water took heat from the salt
4. DDissolving is exothermic; the dissolving salt released heat into the water

How does a rise in temperature affect how much carbon dioxide gas can dissolve in a soft drink?

1. AThe gas turns into a solid at higher temperature
2. BLess gas dissolves, so warm drinks go flat faster
3. CMore gas dissolves, so warm drinks stay fizzy for longer
4. DTemperature has no effect on gas solubility